Winter wheat (Triticum aestivum L.) monoculture is conventionally cultivated followed by two to three months of summer fallow in the Loess Plateau. To develop a sustainable cropping system, we conducted a six-year field experiment to investigate the effect of leguminous green manure (LGM) instead of bare fallow on the yield and water use efficiency (WUE) of winter wheat and the soil water balance (SWB) in different precipitation years in a semi-arid region of northwest China. Results confirmed that planting LGM crop consumes soil water in the fallow season can bring varied effects to the subsequent wheat. The effect is positive or neutral when the annual precipitation is adequate, so that there is no significant reduction in the soil water supplied to wheat. If this is not the case, the effect is negative. On average, the LGM crop increased wheat yield and WUE by 13% and 28%, respectively, and had considerable potential for maintaining the SWB (0\uffe2\uff80\uff93200\uffe2\uff80\uff89cm) compared with fallow management. In conclusion, cultivation of the LGM crop is a better option than fallow to improve the productivity and WUE of the next crop and maintain the soil water balance in the normal and wet years in the Loess Plateau.
", "keywords": ["2. Zero hunger", "China", "Glycine max", "Rain", "Vigna", "Water", "Agriculture", "Plant Transpiration", "15. Life on land", "Article", "6. Clean water", "Droughts", "Soil", "Biomass", "Seasons", "Fertilizers", "Triticum"], "contacts": [{"organization": "Yangyang Li, Pengwei Yao, Dabin Zhang, Weidong Cao, Suiqi Zhang, Zhao Na, Yajun Gao, Yajun Gao,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1038/srep26856"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep26856", "name": "item", "description": "10.1038/srep26856", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep26856"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-05-26T00:00:00Z"}}, {"id": "10.1111/j.1469-8137.2006.01732.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:46Z", "type": "Journal Article", "created": "2006-04-25", "title": "Antecedent Moisture And Seasonal Precipitation Influence The Response Of Canopy-Scale Carbon And Water Exchange To Rainfall Pulses In A Semi-Arid Grassland", "description": "The influences of prior monsoon-season drought (PMSD) and the seasonal timing of episodic rainfall ('pulses') on carbon and water exchange in water-limited ecosystems are poorly quantified. *In the present study, we estimated net ecosystem exchange of CO(2) (NEE) and evapotranspiration (ET) before, and for 15 d following, experimental irrigation in a semi-arid grassland during June and August 2003. Rainout shelters near Tucson, Arizona, USA, were positioned on contrasting soils (clay and sand) and planted with native (Heteropogon contortus) or non-native invasive (Eragrostis lehmanniana) C4 bunchgrasses. Plots received increased ('wet') or decreased ('dry') monsoon-season (July-September) rainfall during 2002 and 2003. Following a June 2003 39-mm pulse, species treatments had similar NEE and ET dynamics including 15-d integrated NEE (NEE(pulse)). Contrary to predictions, PMSD increased net C uptake during June in plots of both species. Greater flux rates after an August 2003 39-mm pulse reflected biotic activity associated with the North American Monsoon. Furthermore, August NEE(pulse) and ecosystem pulse-use efficiency (PUE(e) = NEE(pulse)/ET(pulse)) was greatest in Heteropogon plots. PMSD and rainfall seasonal timing may interact with bunchgrass invasions to alter NEE and ET dynamics with consequences for PUE(e) in water-limited ecosystems.", "keywords": ["0106 biological sciences", "Climate", "Rain", "Arizona", "Water", "Plant Transpiration", "Carbon Dioxide", "Eragrostis", "15. Life on land", "Poaceae", "01 natural sciences", "Carbon", "6. Clean water", "13. Climate action", "Data Interpretation", " Statistical", "Seasons", "Ecosystem", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1111/j.1469-8137.2006.01732.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/New%20Phytologist", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1469-8137.2006.01732.x", "name": "item", "description": "10.1111/j.1469-8137.2006.01732.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1469-8137.2006.01732.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-04-25T00:00:00Z"}}, {"id": "10.1093/treephys/tps133", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:19Z", "type": "Journal Article", "created": "2013-02-01", "title": "Nitrogen Nutrition And Drought Hardening Exert Opposite Effects On The Stress Tolerance Of Pinus Pinea L. Seedlings", "description": "Functional attributes determine the survival and growth of planted seedlings in reforestation projects. Nitrogen (N) and water are important resources in the cultivation of forest species, which have a strong effect on plant functional traits. We analyzed the influence of N nutrition on drought acclimation of Pinus pinea L. seedlings. Specifically, we addressed if high N fertilization reduces drought and frost tolerance of seedlings and whether drought hardening reverses the effect of high N fertilization on stress tolerance. Seedlings were grown under two N fertilization regimes (6 and 100 mg N per plant) and subjected to three drought-hardening levels (well-watered, moderate and strong hardening). Water relations, gas exchange, frost damage, N concentration and growth at the end of the drought-hardening period, and survival and growth of seedlings under controlled xeric and mesic outplanting conditions were measured. Relative to low-N plants, high-N plants were larger, had higher stomatal conductance (27%), residual transpiration (11%) and new root growth capacity and closed stomata at higher water potential. However, high N fertilization also increased frost damage (24%) and decreased plasmalemma stability to dehydration (9%). Drought hardening reversed to a great extent the reduction in stress tolerance caused by high N fertilization as it decreased frost damage, stomatal conductance and residual transpiration by 21, 31 and 24%, respectively, and increased plasmalemma stability to dehydration (8%). Drought hardening increased tissue non-structural carbohydrates and N concentration, especially in high-fertilized plants. Frost damage was positively related to the stability of plasmalemma to dehydration (r\u2009=\u20090.92) and both traits were negatively related to the concentration of reducing soluble sugars. No differences existed between moderate and strong drought-hardening treatments. Neither N nutrition nor drought hardening had any clear effect on seedling performance under xeric outplanting conditions. However, fertilization increased growth under mesic conditions, whereas drought hardening decreased growth. We conclude that drought hardening and N fertilization applied under typical container nursery operational conditions exert opposite effects on the physiological stress tolerance of P. pinea seedlings. While drought hardening increases overall stress tolerance, N nutrition reduces it and yet has no effect on the drought acclimation capacity of seedlings.", "keywords": ["0106 biological sciences", "2. Zero hunger", "Nitrogen", "Acclimatization", "Water", "Plant Transpiration", "15. Life on land", "Pinus", "Plant Roots", "01 natural sciences", "6. Clean water", "Droughts", "Trees", "Cold Temperature", "Plant Leaves", "Seedlings", "Stress", " Physiological", "Plant Stomata", "Photosynthesis", "Fertilizers", "Plant Shoots"]}, "links": [{"href": "https://doi.org/10.1093/treephys/tps133"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Tree%20Physiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1093/treephys/tps133", "name": "item", "description": "10.1093/treephys/tps133", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/tps133"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-01-30T00:00:00Z"}}, {"id": "10.1093/treephys/tpt019", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:19Z", "type": "Journal Article", "created": "2013-03-23", "title": "Synergistic, Additive And Antagonistic Impacts Of Drought And Herbivory On Pinus Sylvestris: Leaf, Tissue And Whole-Plant Responses And Recovery", "description": "Forests typically experience a mix of anthropogenic, natural and climate-induced stressors of different intensities, creating a mosaic of stressor combinations across the landscape. When multiple stressors co-occur, their combined impact on plant growth is often greater than expected based on single-factor studies (i.e., synergistic), potentially causing catastrophic dysfunction of physiological processes from an otherwise recoverable situation. Drought and herbivory are two stressors that commonly co-occur in forested ecosystems, and have the potential to 'overlap' in their impacts on various plant traits and processes. However, the combined impacts from these two stressors may not be predictable based on additive models from single-stressor studies. Moreover, the impacts and subsequent recovery may be strongly influenced by the relative intensities of each stressor. Here, we applied drought stress and simulated bark-feeding herbivory at three levels of intensity (control, moderate and severe) in a full factorial design on young Pinus sylvestris L. seedlings. We assessed if the combined effects from two stressors were additive (responses were equal to the sum of the single-factor effects), synergistic (greater than expected) or antagonistic (less than expected) on a suite of morphological and physiological traits at the leaf-, tissue- and whole-plant level. We additionally investigated whether recovery from herbivory was dependent on relief from drought. The two stressors had synergistic impacts on specific leaf area and water-use efficiency, additive effects on height and root-to-shoot ratios, but antagonistic effects on photosynthesis, conductance and, most notably, on root, shoot and whole-plant biomass. Nevertheless, the magnitude and direction of the combined impacts were often dependent on the relative intensities of each stressor, leading to many additive or synergistic responses from specific stressor combinations. Also, seedling recovery was far more dependent on the previous year's drought compared with the previous year's herbivory, demonstrating the influence of one stressor over another during recovery. Our study reveals for the first time, the importance of not only the presence or absence of drought and herbivory stressors, but also shows that their relative intensities are critical in determining the direction and magnitude of their impacts on establishing seedlings.", "keywords": ["0106 biological sciences", "Water", "Pinus sylvestris", "Plant Transpiration", "15. Life on land", "Plant Roots", "01 natural sciences", "6. Clean water", "Droughts", "Trees", "Plant Leaves", "Seedlings", "Stress", " Physiological", "Biomass", "Herbivory", "Photosynthesis", "Ecosystem", "Plant Shoots"]}, "links": [{"href": "https://doi.org/10.1093/treephys/tpt019"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Tree%20Physiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1093/treephys/tpt019", "name": "item", "description": "10.1093/treephys/tpt019", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/tpt019"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-03-21T00:00:00Z"}}, {"id": "10.1093/treephys/tpt077", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:19Z", "type": "Journal Article", "created": "2013-10-22", "title": "Photosynthesis of Quercus suber is affected by atmospheric NH3 generated by multifunctional agrosystems", "description": "Montados are evergreen oak woodlands dominated by Quercus species, which are considered to be key to biodiversity conservation and ecosystem services. This ecosystem is often used for cattle breeding in most regions of the Iberian Peninsula, which causes plants to receive extra nitrogen as ammonia (NH(3)) through the atmosphere. The effect of this atmospheric NH(3) (NH(3atm)) on ecosystems is still under discussion. This study aimed to evaluate the effects of an NH(3atm) concentration gradient downwind of a cattle barn in a Montado area. Leaves from the selected Quercus suber L. trees along the gradient showed a clear influence of the NH(3) on \u03b4(13)C, as a consequence of a strong limitation on the photosynthetic machinery by a reduction of both stomatal and mesophyll conductance. A detailed study of the impact of NH(3atm) on the photosynthetic performance of Q. suber trees is presented, and new mechanisms by which NH(3) affects photosynthesis at the leaf level are suggested.", "keywords": ["0106 biological sciences", "0301 basic medicine", "Carbon Isotopes", "Agriculture", "Plant Transpiration", "15. Life on land", "01 natural sciences", "Trees", "Plant Leaves", "Quercus", "03 medical and health sciences", "Ammonia", "Plant Stomata", "Photosynthesis", "Mesophyll Cells", "Ecosystem"]}, "links": [{"href": "http://academic.oup.com/treephys/article-pdf/33/12/1328/4675950/tpt077.pdf"}, {"href": "https://doi.org/10.1093/treephys/tpt077"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Tree%20Physiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1093/treephys/tpt077", "name": "item", "description": "10.1093/treephys/tpt077", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/tpt077"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-10-21T00:00:00Z"}}, {"id": "10.1093/plcell/koac263", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:18Z", "type": "Journal Article", "created": "2022-08-26", "title": "Burning questions for a warming and changing world: 15 unknowns in plant abiotic stress", "description": "AbstractWe present unresolved questions in plant abiotic stress biology as posed by 15 research groups with expertise spanning eco-physiology to cell and molecular biology. Common themes of these questions include the need to better understand how plants detect water availability, temperature, salinity, and rising carbon dioxide (CO2) levels; how environmental signals interface with endogenous signaling and development (e.g. circadian clock and flowering time); and how this integrated signaling controls downstream responses (e.g. stomatal regulation, proline metabolism, and growth versus defense balance). The plasma membrane comes up frequently as a site of key signaling and transport events (e.g. mechanosensing and lipid-derived signaling, aquaporins). Adaptation to water extremes and rising CO2 affects hydraulic architecture and transpiration, as well as root and shoot growth and morphology, in ways not fully understood. Environmental adaptation involves tradeoffs that limit ecological distribution and crop resilience in the face of changing and increasingly unpredictable environments. Exploration of plant diversity within and among species can help us know which of these tradeoffs represent fundamental limits and which ones can be circumvented by bringing new trait combinations together. Better defining what constitutes beneficial stress resistance in different contexts and making connections between genes and phenotypes, and between laboratory and field observations, are overarching challenges.Intrinsic water\uffe2\uff80\uff90use efficiency (iWUE) characterizes the physiological control on the simultaneous exchange of water and carbon dioxide in terrestrial ecosystems. Knowledge of iWUE is commonly gained from leaf\uffe2\uff80\uff90level gas exchange measurements, which are inevitably restricted in their spatial and temporal coverage. Flux measurements based on the eddy covariance (EC) technique can overcome these limitations, as they provide continuous and long\uffe2\uff80\uff90term records of carbon and water fluxes at the ecosystem scale. However, vegetation gas exchange parameters derived from EC data are subject to scale\uffe2\uff80\uff90dependent and method\uffe2\uff80\uff90specific uncertainties that compromise their ecophysiological interpretation as well as their comparability among ecosystems and across spatial scales. Here, we use estimates of canopy conductance and gross primary productivity (GPP) derived from EC data to calculate a measure of iWUE (G1, \uffe2\uff80\uff9cstomatal slope\uffe2\uff80\uff9d) at the ecosystem level at six sites comprising tropical, Mediterranean, temperate, and boreal forests. We assess the following six mechanisms potentially causing discrepancies between leaf and ecosystem\uffe2\uff80\uff90level estimates of G1: (i) non\uffe2\uff80\uff90transpirational water fluxes; (ii) aerodynamic conductance; (iii) meteorological deviations between measurement height and canopy surface; (iv) energy balance non\uffe2\uff80\uff90closure; (v) uncertainties in net ecosystem exchange partitioning; and (vi) physiological within\uffe2\uff80\uff90canopy gradients. Our results demonstrate that an unclosed energy balance caused the largest uncertainties, in particular if it was associated with erroneous latent heat flux estimates. The effect of aerodynamic conductance on G1 was sufficiently captured with a simple representation. G1 was found to be less sensitive to meteorological deviations between canopy surface and measurement height and, given that data are appropriately filtered, to non\uffe2\uff80\uff90transpirational water fluxes. Uncertainties in the derived GPP and physiological within\uffe2\uff80\uff90canopy gradients and their implications for parameter estimates at leaf and ecosystem level are discussed. Our results highlight the importance of adequately considering the sources of uncertainty outlined here when EC\uffe2\uff80\uff90derived water\uffe2\uff80\uff90use efficiency is interpreted in an ecophysiological context.
", "keywords": ["550", "ecophysiology", "Penman\u2013Monteith equation", "0207 environmental engineering", "577", "slope parameter", "02 engineering and technology", "Forests", "Models", " Biological", "01 natural sciences", "Trees", "Water Cycle", "XXXXXX - Unknown", "eddy covariance", "energy imbalance", "analysis of covariance", "0105 earth and related environmental sciences", "intrinsic water-use efficiency", "Water", "eddy flux", "Plant Transpiration", "Carbon Dioxide", "15. Life on land", "aerodynamic conductance", "water efficiency", "Carbon", "6. Clean water", "canopy gradients", "surface conductance", "Plant Leaves", "13. Climate action", "ecosystems"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.13893"}, {"href": "https://doi.org/10.1111/gcb.13893"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcb.13893", "name": "item", "description": "10.1111/gcb.13893", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.13893"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-10-11T00:00:00Z"}}, {"id": "10.1111/gcb.14139", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:34Z", "type": "Journal Article", "created": "2018-03-23", "title": "Elevated CO 2 did not affect the hydrological balance of a mature native Eucalyptus woodland", "description": "AbstractElevated atmospheric CO2 concentration (eCa) might reduce forest water\uffe2\uff80\uff90use, due to decreased transpiration, following partial stomatal closure, thus enhancing water\uffe2\uff80\uff90use efficiency and productivity at low water availability. If evapotranspiration (Et) is reduced, it may subsequently increase soil water storage (\uffce\uff94S) or surface runoff (R) and drainage (Dg), although these could be offset or even reversed by changes in vegetation structure, mainly increased leaf area index (L). To understand the effect of eCa in a water\uffe2\uff80\uff90limited ecosystem, we tested whether 2\uffc2\uffa0years of eCa (~40% increase) affected the hydrological partitioning in a mature water\uffe2\uff80\uff90limited Eucalyptus woodland exposed to Free\uffe2\uff80\uff90Air CO2 Enrichment (FACE). This timeframe allowed us to evaluate whether physiological effects of eCa reduced stand water\uffe2\uff80\uff90use irrespective of L, which was unaffected by eCa in this timeframe. We hypothesized that eCa would reduce tree\uffe2\uff80\uff90canopy transpiration (Etree), but excess water from reduced Etree would be lost via increased soil evaporation and understory transpiration (Efloor) with no increase in \uffce\uff94S, R or Dg. We computed Et, \uffce\uff94S, R and Dg from measurements of sapflow velocity, L, soil water content (\uffce\uffb8), understory micrometeorology, throughfall and stemflow. We found that eCa did not affect Etree, Efloor, \uffce\uff94S or \uffce\uffb8 at any depth (to 4.5\uffc2\uffa0m) over the experimental period. We closed the water balance for dry seasons with no differences in the partitioning to R and Dg between Ca levels. Soil temperature and \uffce\uffb8 were the main drivers of Efloor while vapour pressure deficit\uffe2\uff80\uff90controlled Etree, though eCa did not significantly affect any of these relationships. Our results suggest that in the short\uffe2\uff80\uff90term, eCa does not significantly affect ecosystem water\uffe2\uff80\uff90use at this site. We conclude that water\uffe2\uff80\uff90savings under eCa mediated by either direct effects on plant transpiration or by indirect effects via changes in L or soil moisture availability are unlikely in water\uffe2\uff80\uff90limited mature eucalypt woodlands.
", "keywords": ["plant-water relationships", "[SDE] Environmental Sciences", "0106 biological sciences", "0301 basic medicine", "Vapor Pressure", "[SDV]Life Sciences [q-bio]", "interception", "Forests", "01 natural sciences", "free-air CO2 enrichment", "Soil", "03 medical and health sciences", "XXXXXX - Unknown", "water-use efficiency", "0105 earth and related environmental sciences", "580", "tree water", "Eucalyptus", "Temperature", "carbon dioxide", "Water", "Plant Transpiration", "Carbon Dioxide", "15. Life on land", "Eucalyptus tereticornis", "6. Clean water", "[SDV] Life Sciences [q-bio]", "Plant Leaves", "climate change", "stomatal conductance", "13. Climate action", "[SDE]Environmental Sciences", "Seasons", "Hydrology"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14139"}, {"href": "https://doi.org/10.1111/gcb.14139"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcb.14139", "name": "item", "description": "10.1111/gcb.14139", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.14139"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-17T00:00:00Z"}}, {"id": "10.1111/j.1365-3040.2011.02465.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:44Z", "type": "Journal Article", "created": "2011-11-17", "title": "Light Inhibition Of Leaf Respiration In Field-Grown Eucalyptus Saligna In Whole-Tree Chambers Under Elevated Atmospheric Co2 And Summer Drought", "description": "SUMMARYWe investigated whether the degree of light inhibition of leaf respiration (R) differs among large Eucalyptus saligna grown in whole\uffe2\uff80\uff90tree chambers and exposed to present and future atmospheric [CO2] and summer drought. Associated with month\uffe2\uff80\uff90to\uffe2\uff80\uff90month changes in temperature were concomitant changes in R in the light (Rlight) and darkness (Rdark), with both processes being more temperature dependent in well\uffe2\uff80\uff90watered trees than under drought. Overall rates of Rlight and Rdark were not significantly affected by [CO2]. By contrast, overall rates of Rdark (averaged across both [CO2]) were ca. 25% lower under drought than in well\uffe2\uff80\uff90watered trees. During summer, the degree of light inhibition of leaf R was greater in droughted (ca. 80% inhibition) than well\uffe2\uff80\uff90watered trees (ca. 50% inhibition). Notwithstanding these treatment differences, an overall positive relationship was observed between Rlight and Rdark when data from all months/treatments were combined (R2\uffe2\uff80\uff83=\uffe2\uff80\uff830.8). Variations in Rlight were also positively correlated with rates of Rubisco activity and nitrogen concentration. Light inhibition resulted in a marked decrease in the proportion of light\uffe2\uff80\uff90saturated photosynthesis respired (i.e. reduced R/Asat). Collectively, these results highlight the need to account for light inhibition when assessing impacts of global change drivers on the carbon economy of tree canopies.
", "keywords": ["0301 basic medicine", "0106 biological sciences", "Light", "01 natural sciences", "nitrogen", "ribulosebisphosphate carboxylase", "Trees", "Keywords: carbon", "leaf respiration", "Photosynthesis", "Eucalyptus", "concentration (composition)", "droughts", "drought stress", "Photorespiration", "Temperature", "Rlight", "Darkness", "Photochemical Processes", "6. Clean water", "inhibition", "Droughts", "assessment method", "Elevated CO2", "Seasons", "photorespiration", "Nitrogen", "light effect", "Ribulose-Bisphosphate Carboxylase", "water", "Cell Respiration", "evergreen tree", "03 medical and health sciences", "Stress", " Physiological", "XXXXXX - Unknown", "temp Carbon balance", "global change", "580", "photosynthesis", "Drought", "Australia", "carbon dioxide", "temperature", "Water", "Plant Transpiration", "15. Life on land", "Carbon Dioxide", "Carbon", "Plant Leaves", "13. Climate action", "Plant Stomata", "Leaf respiration", "respiration"]}, "links": [{"href": "https://openresearch-repository.anu.edu.au/bitstream/1885/51083/5/Light_inhibition_of_leaf_respiration_in_field-grown.pdf.jpg"}, {"href": "https://openresearch-repository.anu.edu.au/bitstream/1885/51083/7/01_Crous_Light_inhibition_of_leaf_2012.pdf.jpg"}, {"href": "https://doi.org/10.1111/j.1365-3040.2011.02465.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%2C%20Cell%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-3040.2011.02465.x", "name": "item", "description": "10.1111/j.1365-3040.2011.02465.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-3040.2011.02465.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-12-14T00:00:00Z"}}, {"id": "10.1111/j.1438-8677.2011.00552.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:45Z", "type": "Journal Article", "created": "2012-01-30", "title": "Water Regime And Growth Of Young Oak Stands Subjected To Air-Warming And Drought On Two Different Forest Soils In A Model Ecosystem Experiment", "description": "AbstractGlobal climate change is expected to increase annual temperatures and decrease summer precipitation in Central Europe. Little is known of how forests respond to the interaction of these climate factors and if their responses depend on soil conditions. In a 3\uffe2\uff80\uff90year lysimeter experiment, we investigated the growth response of young mixed oak stands, on either acidic or calcareous soil, to soil water regime, air\uffe2\uff80\uff90warming and drought treatments corresponding to an intermediate climate change scenario. The air\uffe2\uff80\uff90warming and drought treatments were applied separately as well as in combination. The air\uffe2\uff80\uff90warming treatment had no effect on soil water availability, evapotranspiration or stand biomass. Decreased evapotranspiration from the drought\uffe2\uff80\uff90exposed stands led to significantly higher air and soil temperatures, which were attributed to impaired transpirational cooling. Water limitation significantly reduced the stand foliage, shoot and root biomass as droughts were severe, as shown in low leaf water potentials. Additional air warming did not enhance the drought effects on evapotranspiration and biomass, although more negative leaf water potentials were observed. After re\uffe2\uff80\uff90watering, evapotranspiration increased within a few days to pre\uffe2\uff80\uff90drought levels. Stands not subjected to the drought treatment produced significantly less biomass on the calcareous soil than on the acidic soil, probably due to P or Mn limitation. There was no difference in biomass and water regime between the two soils under drought conditions, indicating that nutrient availability was governed by water availability under these conditions. The results demonstrate that young oak stands can cope with severe drought and therefore can be considered for future forestry.
", "keywords": ["0301 basic medicine", "0106 biological sciences", "Hot Temperature", "Global Warming", "01 natural sciences", "Trees", "03 medical and health sciences", "Quercus", "Soil", "Stress", " Physiological", "Root: shoot ratio", "Soil temperature", "Biomass", "Ecosystem", "Manganese", "Evapotranspiration", "Air", "Water use efficiency", "Water", "Phosphorus", "Plant Transpiration", "04 agricultural and veterinary sciences", "15. Life on land", "Adaptation", " Physiological", "6. Clean water", "Droughts", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Plant Structures", "Soil-plant interactions"]}, "links": [{"href": "https://doi.org/10.1111/j.1438-8677.2011.00552.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1438-8677.2011.00552.x", "name": "item", "description": "10.1111/j.1438-8677.2011.00552.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1438-8677.2011.00552.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-01-30T00:00:00Z"}}, {"id": "10.1111/j.1399-3054.2008.01138.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:45Z", "type": "Journal Article", "created": "2008-05-26", "title": "Adjustments Of Water Use Efficiency By Stomatal Regulation During Drought And Recovery In The Drought-Adaptedvitishybrid Richter-110 (V.\u2003Berlandieri\u2003\u00d7\u2003V.\u2003Rupestris)", "description": "The hybrid Richter\uffe2\uff80\uff90110 (Vitis berlandieri\uffe2\uff80\uff83\uffc3\uff97\uffe2\uff80\uff83Vitis rupestris) (R\uffe2\uff80\uff90110) has the reputation of being a genotype strongly adapted to drought. A study was performed with plants of R\uffe2\uff80\uff90110 subjected to water withholding followed by re\uffe2\uff80\uff90watering. The goal was to analyze how stomatal conductance (gs) is regulated with respect to different physiological variables under water stress and recovery, as well as how water stress affects adjustments of water use efficiency (WUE) at the leaf level. Water stress induced a substantial stomatal closure and an increase in WUE, which persisted many days after re\uffe2\uff80\uff90watering. The gs during water stress was mainly related to the content of ABA in the xylem and partly related to plant hydraulic conductivity but not to leaf water potential. By contrast, low gs during re\uffe2\uff80\uff90watering did not correlate with ABA contents and was only related to a sustained decreased hydraulic conductivity. In addition to a complex physiological regulation of stomatal closure, gs and rate of transpiration (E) were strongly affected by leaf\uffe2\uff80\uff90to\uffe2\uff80\uff90air vapor pressure deficit (VPD) in a way dependent of the treatment. Interestingly, E increased with increasing VPD in control plants, but decreased with increasing VPD in severely stressed plants. All together, the fine stomatal regulation in R\uffe2\uff80\uff90110 resulted in very high WUE at the leaf level. This genotype is revealed to be very interesting for further studies on the physiological mechanisms leading to regulation of stomatal responsiveness and WUE in response to drought.
", "keywords": ["0106 biological sciences", "Picea abies", "Stomatal conductance; water use efficiency; water stress; drought; water potential; water relations; plant hydraulics; abscisic acid; vapour pressure deficit", "Water", "Plant Transpiration", "svinec", "info:eu-repo/classification/udc/581", "15. Life on land", "sadike", "Adaptation", " Physiological", "01 natural sciences", "6. Clean water", "Droughts", "Plant Leaves", "Plant Stomata", "Hybridization", " Genetic", "Vitis", "citokinin"]}, "links": [{"href": "https://doi.org/10.1111/j.1399-3054.2008.01138.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Physiologia%20Plantarum", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1399-3054.2008.01138.x", "name": "item", "description": "10.1111/j.1399-3054.2008.01138.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1399-3054.2008.01138.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-09-15T00:00:00Z"}}, {"id": "10.3390/rs10101601", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:29Z", "type": "Journal Article", "created": "2018-10-09", "title": "Sensitivity of Evapotranspiration Components in Remote Sensing-Based Models", "description": "Accurately estimating evapotranspiration (ET) at large spatial scales is essential to our understanding of land-atmosphere coupling and the surface balance of water and energy. Comparisons between remote sensing-based ET models are difficult due to diversity in model formulation, parametrization and data requirements. The constituent components of ET have been shown to deviate substantially among models as well as between models and field estimates. This study analyses the sensitivity of three global ET remote sensing models in an attempt to isolate the error associated with forcing uncertainty and reveal the underlying variables driving the model components. We examine the transpiration, soil evaporation, interception and total ET estimates of the Penman-Monteith model from the Moderate Resolution Imaging Spectroradiometer (PM-MOD), the Priestley-Taylor Jet Propulsion Laboratory model (PT-JPL) and the Global Land Evaporation Amsterdam Model (GLEAM) at 42 sites where ET components have been measured using field techniques. We analyse the sensitivity of the models based on the uncertainty of the input variables and as a function of the raw value of the variables themselves. We find that, at 10% added uncertainty levels, the total ET estimates from PT-JPL, PM-MOD and GLEAM are most sensitive to Normalized Difference Vegetation Index (NDVI) (%RMSD = 100.0), relative humidity (%RMSD = 122.3) and net radiation (%RMSD = 7.49), respectively. Consistently, systemic bias introduced by forcing uncertainty in the component estimates is mitigated when components are aggregated to a total ET estimate. These results suggest that slight changes to forcing may result in outsized variation in ET partitioning and relatively smaller changes to the total ET estimates. Our results help to explain why model estimates of total ET perform relatively well despite large inter-model divergence in the individual ET component estimates.
", "keywords": ["550", "Science", "TROPICAL RAIN-FOREST", "0208 environmental biotechnology", "evapotranspiration", "0207 environmental engineering", "02 engineering and technology", "interception", "SOIL-MOISTURE", "transpiration", "modelling", "partitioning", "soil evaporation", "uncertainty", "DROUGHT", "evapotranspiration; modelling; sensitivity; uncertainty; transpiration; soil evaporation; interception; partitioning", "CLIMATE-CHANGE", "Q", "Biology and Life Sciences", "PLANT TRANSPIRATION", "sensitivity", "6. Clean water", "CHIHUAHUAN DESERT", "GLOBAL TERRESTRIAL EVAPOTRANSPIRATION", "13. Climate action", "Earth and Environmental Sciences", "LAND EVAPORATION", "WATER-BALANCE", "FEEDBACKS", "[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]", "[PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph]"]}, "links": [{"href": "http://www.mdpi.com/2072-4292/10/10/1601/pdf"}, {"href": "https://doi.org/10.3390/rs10101601"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Remote%20Sensing", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/rs10101601", "name": "item", "description": "10.3390/rs10101601", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/rs10101601"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-10-09T00:00:00Z"}}, {"id": "10.1111/nph.15123", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:17:53Z", "type": "Journal Article", "created": "2018-03-31", "title": "Quantifying soil moisture impacts on light use efficiency across biomes", "description": "Summary
Terrestrial primary productivity and carbon cycle impacts of droughts are commonly quantified using vapour pressure deficit (VPD) data and remotely sensed greenness, without accounting for soil moisture. However, soil moisture limitation is known to strongly affect plant physiology.
Here, we investigate light use efficiency, the ratio of gross primary productivity (GPP) to absorbed light. We derive its fractional reduction due to soil moisture (fLUE), separated from VPD and greenness changes, using artificial neural networks trained on eddy covariance data, multiple soil moisture datasets and remotely sensed greenness.
This reveals substantial impacts of soil moisture alone that reduce GPP by up to 40% at sites located in sub\uffe2\uff80\uff90humid, semi\uffe2\uff80\uff90arid or arid regions. For sites in relatively moist climates, we find, paradoxically, a muted fLUE response to drying soil, but reduced fLUE under wet conditions.
fLUE identifies substantial drought impacts that are not captured when relying solely on VPD and greenness changes and, when seasonally recurring, are missed by traditional, anomaly\uffe2\uff80\uff90based drought indices. Counter to common assumptions, fLUE reductions are largest in drought\uffe2\uff80\uff90deciduous vegetation, including grasslands. Our results highlight the necessity to account for soil moisture limitation in terrestrial primary productivity data products, especially for drought\uffe2\uff80\uff90related assessments.
", "keywords": ["Time Factors", "550", "vapour pressure deficit", "Light", "Vapor Pressure", "Rain", "Eddy covariance", "02 engineering and technology", "01 natural sciences", "630", "Ecological applications", "Soil", "drought impacts", "Vapour pressure deficit", "Photosynthesis", "drought impacts; eddy covariance; gross primary productivity (GPP); light use efficiency; photosynthesis; soil moisture; standardized precipitation index; vapour pressure deficit (VPD)", "Plant biology", "2. Zero hunger", "Light use efficiency", "Ecology", "gross primary productivity (GPP)", "Biological Sciences", "6. Clean water", "Droughts", "Climate change impacts and adaptation", "gross primary productivity", "Neural Networks", "Plant Biology & Botany", "Drought impacts", "vapour pressure deficit (VPD)", "0207 environmental engineering", "Computer", "eddy covariance", "light use efficiency", "Ecosystem", "0105 earth and related environmental sciences", "photosynthesis", "Agricultural and Veterinary Sciences", "Research", "Gross primary productivity ()", "Water", "Humidity", "Plant Transpiration", "06 Biological Sciences", "15. Life on land", "standardized precipitation index", "13. Climate action", "vapour pressure deficit (VPD", "Standardized precipitation index", "07 Agricultural And Veterinary Sciences", "Soil moisture", "Neural Networks", " Computer", "soil moisture", "Climate Change Impacts and Adaptation", "Environmental Sciences"]}, "links": [{"href": "https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.15123"}, {"href": "https://escholarship.org/content/qt3sb2745c/qt3sb2745c.pdf"}, {"href": "https://doi.org/10.1111/nph.15123"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/New%20Phytologist", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/nph.15123", "name": "item", "description": "10.1111/nph.15123", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/nph.15123"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-03-31T00:00:00Z"}}, {"id": "10.1890/09-0934.1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:18:39Z", "type": "Journal Article", "created": "2010-04-09", "title": "Carbon And Water Fluxes From Ponderosa Pine Forests Disturbed By Wildfire And Thinning", "description": "Disturbances alter ecosystem carbon dynamics, often by reducing carbon uptake and stocks. We compared the impact of two types of disturbances that represent the most likely future conditions of currently dense ponderosa pine forests of the southwestern United States: (1) high\uffe2\uff80\uff90intensity fire and (2) thinning, designed to reduce fire intensity. High\uffe2\uff80\uff90severity fire had a larger impact on ecosystem carbon uptake and storage than thinning. Total ecosystem carbon was 42% lower at the intensely burned site, 10 years after burning, than at the undisturbed site. Eddy covariance measurements over two years showed that the burned site was a net annual source of carbon to the atmosphere whereas the undisturbed site was a sink. Net primary production (NPP), evapotranspiration (ET), and water use efficiency were lower at the burned site than at the undisturbed site. In contrast, thinning decreased total ecosystem carbon by 18%, and changed the site from a carbon sink to a source in the first post\uffe2\uff80\uff90treatment year. Thinning also decreased ET, reduced the limitation of drought on carbon uptake during summer, and did not change water use efficiency. Both disturbances reduced ecosystem carbon uptake by decreasing gross primary production (55% by burning, 30% by thinning) more than total ecosystem respiration (TER; 33\uffe2\uff80\uff9347% by burning, 18% by thinning), and increased the contribution of soil carbon dioxide efflux to TER. The relationship between TER and temperature was not affected by either disturbance. Efforts to accurately estimate regional carbon budgets should consider impacts on carbon dynamics of both large disturbances, such as high\uffe2\uff80\uff90intensity fire, and the partial disturbance of thinning that is often used to prevent intense burning. Our results show that thinned forests of ponderosa pine in the southwestern United States are a desirable alternative to intensively burned forests to maintain carbon stocks and primary production.
", "keywords": ["Biometry", "QH301 Biology", "Cell Respiration", "Arizona", "Water", "Forestry", "Plant Transpiration", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Carbon", "Fires", "6. Clean water", "Pinus ponderosa", "Soil", "13. Climate action", "Biomass", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1890/09-0934.1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecological%20Applications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1890/09-0934.1", "name": "item", "description": "10.1890/09-0934.1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1890/09-0934.1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-04-01T00:00:00Z"}}, {"id": "10044/1/59029", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:21:59Z", "type": "Journal Article", "created": "2018-03-31", "title": "Quantifying soil moisture impacts on light use efficiency across biomes", "description": "Summary
Terrestrial primary productivity and carbon cycle impacts of droughts are commonly quantified using vapour pressure deficit (VPD) data and remotely sensed greenness, without accounting for soil moisture. However, soil moisture limitation is known to strongly affect plant physiology.
Here, we investigate light use efficiency, the ratio of gross primary productivity (GPP) to absorbed light. We derive its fractional reduction due to soil moisture (fLUE), separated from VPD and greenness changes, using artificial neural networks trained on eddy covariance data, multiple soil moisture datasets and remotely sensed greenness.
This reveals substantial impacts of soil moisture alone that reduce GPP by up to 40% at sites located in sub\uffe2\uff80\uff90humid, semi\uffe2\uff80\uff90arid or arid regions. For sites in relatively moist climates, we find, paradoxically, a muted fLUE response to drying soil, but reduced fLUE under wet conditions.
fLUE identifies substantial drought impacts that are not captured when relying solely on VPD and greenness changes and, when seasonally recurring, are missed by traditional, anomaly\uffe2\uff80\uff90based drought indices. Counter to common assumptions, fLUE reductions are largest in drought\uffe2\uff80\uff90deciduous vegetation, including grasslands. Our results highlight the necessity to account for soil moisture limitation in terrestrial primary productivity data products, especially for drought\uffe2\uff80\uff90related assessments.
We present unresolved questions in plant abiotic stress biology as posed by 15 research groups with expertise spanning eco-physiology to cell and molecular biology. Common themes of these questions include the need to better understand how plants detect water availability, temperature, salinity, and rising carbon dioxide (CO2) levels; how environmental signals interface with endogenous signaling and development (e.g. circadian clock and flowering time); and how this integrated signaling controls downstream responses (e.g. stomatal regulation, proline metabolism, and growth versus defense balance). The plasma membrane comes up frequently as a site of key signaling and transport events (e.g. mechanosensing and lipid-derived signaling, aquaporins). Adaptation to water extremes and rising CO2 affects hydraulic architecture and transpiration, as well as root and shoot growth and morphology, in ways not fully understood. Environmental adaptation involves tradeoffs that limit ecological distribution and crop resilience in the face of changing and increasingly unpredictable environments. Exploration of plant diversity within and among species can help us know which of these tradeoffs represent fundamental limits and which ones can be circumvented by bringing new trait combinations together. Better defining what constitutes beneficial stress resistance in different contexts and making connections between genes and phenotypes, and between laboratory and field observations, are overarching challenges.