BACKGROUND: Drought is a major environmental stress limiting plant growth, productivity, and survival worldwide. Rootstocks are widely used to enhance plants resistance to drought stresses. This study determined influence of rootstock on drought responses in 1\uffe2\uff80\uff90year\uffe2\uff80\uff90old \uffe2\uff80\uff98Gale Gala\uffe2\uff80\uff99 apple trees grafted onto Malus sieversii or M. hupehensis.
RESULTS: Choice of rootstock resulted in differential response to drought stress. Specifically, M. sieversii caused less drought\uffe2\uff80\uff90induced reduction in relative growth rate, biomass accumulation, leaf area, leaf chlorophyll content, relative water content, photosynthesis rate and maximum chlorophyll fluorescence yield but greater increase in whole\uffe2\uff80\uff90plant water use efficiency compared to M. hupehensis. Secondly, compared with M. hupehensis, M. sieversii caused less drought\uffe2\uff80\uff90induced accumulation of reactive oxygen species but more increase in activities of antioxidant enzymes. In addition, xylem sap abscisic acid concentration was greater in trees grafted onto M. hupehensis than in those grafted onto M. sieversii under drought stress.
CONCLUSION: \uffe2\uff80\uff98Gale Gala\uffe2\uff80\uff99 trees' response to drought stress was associated with the rootstock's genotype onto which it was grafted. Trees with M. sieversii as rootstock are more drought resistant than trees with M. hupehensis as rootstock, which suggests that M. sieversii can be widely used as rootstock in arid and semi\uffe2\uff80\uff90arid regions. Copyright \uffc2\uffa9 2012 Society of Chemical Industry
", "keywords": ["Chlorophyll", "0301 basic medicine", "Plant Roots", "Antioxidants", "Fluorescence", "Trees", "03 medical and health sciences", "Species Specificity", "Stress", " Physiological", "Xylem", "Biomass", "Photosynthesis", "2. Zero hunger", "0402 animal and dairy science", "Water", "04 agricultural and veterinary sciences", "15. Life on land", "Adaptation", " Physiological", "6. Clean water", "Droughts", "Plant Leaves", "Malus", "0401 agriculture", " forestry", " and fisheries", "0405 other agricultural sciences", "Reactive Oxygen Species", "Abscisic Acid"], "contacts": [{"organization": "Binghua Liu, Fengwang Ma, Dong Liang, Yangjun Zou, Liang Cheng,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1002/jsfa.5647"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.5647", "name": "item", "description": "10.1002/jsfa.5647", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.5647"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-03-19T00:00:00Z"}}, {"id": "10.1016/j.envexpbot.2020.104095", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:15:49Z", "type": "Journal Article", "created": "2020-04-25", "title": "Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution", "description": "Soil drying increases endogenous ABA and ACC concentrations in planta, but how these compounds interact to regulate stomatal responses to soil drying and re-watering is still unclear. To determine the temporal dynamics and physiological significance of root, xylem and leaf ABA and ACC concentrations in response to deficit irrigation (DI) or partial rootzone drying (PRD-F) and re-watering, these variables were measured in plants exposed to similar whole pot soil water contents. Both DI and PRD-F plants received only a fraction of the irrigation supplied to well-watered (WW) plants, either to all (DI) or part (PRD-F) of the rootzone of plants grown in split-pots. Both DI and PRD-F induced partial stomatal closure, increased root ABA and ACC accumulation consistent with local soil water content, but did not affect xylem or leaf concentrations of these compounds compared to WW plants. Two hours after re-watering all (DI-RW) or part of the rootzone (PRD-A) to the same soil water content, stomatal conductance returned to WW values or further decreased respectively. Re-watering the whole rootzone had no effect on xylem and leaf ABA and ACC concentrations, while re-watering the dry side of the pot in PRD plants had no effect on xylem and leaf ABA concentrations but increased xylem and leaf ACC concentrations and leaf ethylene evolution. Leaf water potential was similar between all irrigation treatments, with stomatal conductance declining as xylem ABA concentrations and leaf ACC concentrations increased. Prior to re-watering PRD plants, accounting for the spatial differences in soil water uptake best explained variation in xylem ACC concentration suggesting root-to-shoot ACC signalling, but this model did not account for variation in xylem ACC concentration after re-watering the dry side of PRD plants. Thus local (foliar) and long-distance (root-to-shoot) variation in ACC status both seem important in regulating the temporal dynamics of foliar ethylene evolution in plants exposed to PRD.", "keywords": ["0106 biological sciences", "Irrigation", "Stomatal conductance", "Root-to-shoot signalling", "Ethylene", "Physiological significance", "Deficit irrigation", "Plant Science", "Leaf water", "F06 Irrigation", "01 natural sciences", "ACC", "Ecology", " Evolution", " Behavior and Systematics", "580", "2. Zero hunger", "Xylem", "15. Life on land", "F60 Plant physiology and biochemistry", "6. Clean water", "Horticulture", "13. Climate action", "Soil water", "Agronomy and Crop Science", "Soil moisture heterogeneity", "Partial rootzone drying"]}, "links": [{"href": "https://eprints.lancs.ac.uk/id/eprint/144510/1/Juan_EEB_Manuscript_final.pdf"}, {"href": "https://doi.org/10.1016/j.envexpbot.2020.104095"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20and%20Experimental%20Botany", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envexpbot.2020.104095", "name": "item", "description": "10.1016/j.envexpbot.2020.104095", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envexpbot.2020.104095"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-01T00:00:00Z"}}, {"id": "10.1016/j.agrformet.2020.108031", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:15:18Z", "type": "Journal Article", "created": "2020-05-29", "title": "Inter-individual variability in spring phenology of temperate deciduous trees depends on species, tree size and previous year autumn phenology", "description": "We explored the inter-individual variability in bud-burst and its potential drivers, in homogeneous mature stands of temperate deciduous trees. Phenological observations of leaves and wood formation were performed weekly from summer 2017 to summer 2018 for pedunculate oak, European beech and silver birch in Belgium. The variability of bud-burst was correlated to previous' year autumn phenology (i.e. the onset of leaf senescence and the cessation of wood formation) and tree size but with important differences among species. In fact, variability of bud-burst was primarily related to onset of leaf senescence, cessation of wood formation and tree height for oak, beech and birch, respectively. The inter-individual variability of onset of leaf senescence was not related to the tree characteristics considered and was much larger than the inter-individual variability in bud-burst. Multi-species multivariate models could explain up to 66% of the bud-burst variability. These findings represent an important advance in our fundamental understanding and modelling of phenology and tree functioning of deciduous tree species.", "keywords": ["Agriculture and Food Sciences", "0106 biological sciences", "Atmospheric Science", "polno olistanje", "Broadleaved forest", "Silver birch", "Edellauvskog", "coloration", "01 natural sciences", "fenologija", "navadna bukev", "Pedunculate oak", "FAGUS-SYLVATICA", "PHLOEM", "Global and Planetary Change", "LEAF PHENOLOGY", "CLIMATE-CHANGE", "VDP::\u00d8kologi: 488", "Physics", "Forestry", "VDP::Ecology: 488", "04 agricultural and veterinary sciences", "dob", "navadna breza", "Chemistry", "Phenology", "info:eu-repo/classification/udc/630*811", "rumenenje listov", "XYLEM", "MODELS", "Article", "leaf unfolding", "Fenologi", "Coloration", "nastanek lesa", "Biology", "Wood formation", "kambij", "Leaf unfolding", "RADIAL GROWTH", "15. Life on land", "listavci", "European beech", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "SENESCENCE", "13. Climate action", "wood formation", "0401 agriculture", " forestry", " and fisheries", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology", "Agronomy and Crop Science"]}, "links": [{"href": "https://doi.org/10.1016/j.agrformet.2020.108031"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agricultural%20and%20Forest%20Meteorology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agrformet.2020.108031", "name": "item", "description": "10.1016/j.agrformet.2020.108031", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agrformet.2020.108031"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-01T00:00:00Z"}}, {"id": "10.1016/j.cell.2021.04.024", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:35Z", "type": "Journal Article", "created": "2021-05-18", "title": "Innovation, conservation, and repurposing of gene function in root cell type development", "description": "Plant species have evolved myriads of solutions, including complex cell type development and regulation, to adapt to dynamic environments. To understand this cellular diversity, we profiled tomato root cell type translatomes. Using xylem differentiation in tomato, examples of functional innovation, repurposing, and conservation of transcription factors are described, relative to the model plant Arabidopsis. Repurposing and innovation of genes are further observed within an exodermis regulatory network and illustrate its function. Comparative translatome analyses of rice, tomato, and Arabidopsis cell populations suggest increased expression conservation of root meristems compared with other homologous populations. In addition, the functions of constitutively expressed genes are more conserved than those of cell type/tissue-enriched genes. These observations suggest that higher order properties of cell type and pan-cell type regulation are evolutionarily conserved between plants and animals.", "keywords": ["root development", "translatomes", "General Biochemistry", "Genetics and Molecular Biology", "Green Fluorescent Proteins", "Meristem", "Arabidopsis", "cell types; evolution; exodermis; gene regulation; rice; root development; tomato; translatomes; xylem", "tomato", "xylem", "Genes", " Plant", "Plant Roots", "Inventions", "Solanum lycopersicum", "Species Specificity", "Gene Expression Regulation", " Plant", "Xylem", "evolution", "Gene Regulatory Networks", "Promoter Regions", " Genetic", "Plant Proteins", "2. Zero hunger", "exodermis", "rice", "15. Life on land", "Protein Biosynthesis", "cell types", "gene regulation", "Transcription Factors"]}, "links": [{"href": "https://www.research.unipd.it/bitstream/11577/3392826/2/PIIS0092867421005043.pdf"}, {"href": "https://doi.org/10.1016/j.cell.2021.04.024"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Cell", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.cell.2021.04.024", "name": "item", "description": "10.1016/j.cell.2021.04.024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.cell.2021.04.024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-06-01T00:00:00Z"}}, {"id": "10.1016/j.jtbi.2024.111737", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:16:24Z", "type": "Journal Article", "created": "2024-01-25", "title": "A mathematical model of biofilm growth and spread within plant xylem: Case study of Xylella fastidiosa in olive trees", "description": "Xylem-limited bacterial pathogens cause some of the most destructive plant diseases. Though imposed measures to control these pathogens are generally ineffective, even among susceptible taxa, some hosts can limit bacterial loads and symptom expression. Mechanisms by which this resistance is achieved are poorly understood. In particular, it is still unknown how differences in vascular structure may influence biofilm growth and spread within a host. To address this, we developed a novel theoretical framework to describe biofilm behaviour within xylem vessels, adopting a polymer-based modelling approach. We then parameterised the model to investigate the relevance of xylem vessel diameters on Xylella fastidiosa resistance among olive cultivars. The functionality of all vessels was severely reduced under infection, with hydraulic flow reductions of 2-3 orders of magnitude. However, results suggest wider vessels act as biofilm incubators; allowing biofilms to develop over a long time while still transporting them through the vasculature. By contrast, thinner vessels become blocked much earlier, limiting biofilm spread. Using experimental data on vessel diameter distributions, we were able to determine that a mechanism of resistance in the olive cultivar Leccino is a relatively low abundance of the widest vessels, limiting X. fastidiosa spread.", "keywords": ["Xylella fastidiosa", "0301 basic medicine", "0303 health sciences", "Xylem-limited bacterial pathogen", "Olive", "Models", " Theoretical", "Xylella", "630", "olive", "03 medical and health sciences", "Xylem", "Olea", "Biofilms", "multiphase model", "biofilm formation", "Biofilm formation", "Multiphase model", "xylem-limited bacterial pathogen", "Plant Diseases"]}, "links": [{"href": "https://iris.cnr.it/bitstream/20.500.14243/516500/1/Walker%20et%20al.%2c%202024.pdf"}, {"href": "https://eprints.soton.ac.uk/490090/1/1-s2.0-S0022519324000183-main.pdf"}, {"href": "https://doi.org/10.1016/j.jtbi.2024.111737"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Theoretical%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jtbi.2024.111737", "name": "item", "description": "10.1016/j.jtbi.2024.111737", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jtbi.2024.111737"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-03-01T00:00:00Z"}}, {"id": "10.1093/aob/mcr082", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:11Z", "type": "Journal Article", "created": "2011-04-14", "title": "Leaf Traits, Shoot Growth And Seed Production In Mature Fagus Sylvatica Trees After 8 Years Of Co2 Enrichment", "description": "Masting, i.e. synchronous but highly variable interannual seed production, is a strong sink for carbon and nutrients. It may, therefore, compete with vegetative growth. It is currently unknown whether increased atmospheric CO(2) concentrations will affect the carbon balance (or that of other nutrients) between reproduction and vegetative growth of forest species. In this study, reproduction and vegetative growth of shoots of mature beech (Fagus sylvatica) trees grown at ambient and elevated atmospheric CO(2) concentrations were quantified. It was hypothesized that within a shoot, fruiting has a negative effect on vegetative growth, and that this effect is ameliorated at increased CO(2) concentrations.Reproduction and its competition with leaf and shoot production were examined during two masting events (in 2007 and 2009) in F. sylvatica trees that had been exposed to either ambient or elevated CO(2) concentrations (530 \u00b5mol mol(-1)) for eight consecutive years, between 2000 and 2008.The number of leaves per shoot and the length of terminal shoots was smaller or shorter in the two masting years compared with the one non-masting year (2008) investigated, but they were unaffected by elevated CO(2) concentrations. The dry mass of terminal shoots was approx. 2-fold lower in the masting year (2007) than in the non-masting year in trees growing at ambient CO(2) concentrations, but this decline was not observed in trees exposed to elevated CO(2) concentrations. In both the CO(2) treatments, fruiting significantly decreased nitrogen concentration by 25 % in leaves and xylem tissue of 1- to 3-year-old branches in 2009.Our findings indicate that there is competition for resources between reproduction and shoot growth. Elevated CO(2) concentrations reduced this competition, indicating effects on the balance of resource allocation between reproduction and vegetative growth in shoots with rising atmospheric CO(2) concentrations.", "keywords": ["0106 biological sciences", "Time Factors", "Nitrogen", "Reproduction", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Carbon", "Trees", "Plant Leaves", "Xylem", "13. Climate action", "Fruit", "Seeds", "Fagus", "Plant Shoots", "Switzerland"], "contacts": [{"organization": "Han, Qingmin, Kabeya, Daisuke, Hoch, G\u00fcnter,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1093/aob/mcr082"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Annals%20of%20Botany", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1093/aob/mcr082", "name": "item", "description": "10.1093/aob/mcr082", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/aob/mcr082"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-04-14T00:00:00Z"}}, {"id": "10.1093/treephys/25.11.1419", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:18:16Z", "type": "Journal Article", "created": "2012-01-20", "title": "Differentiation And Functional Connection Of Vascular Elements In Compatible And Incompatible Pear/Quince Internode Micrografts", "description": "Micrografts of internodes excised from in vitro grown pear plants (Pyrus communis L. cv. 'Bosc' (B) and cv. 'Butirra Hardy' (BH)) and quince (Cydonia oblonga Mill. East Malling clone C (EMC)), were cultured aseptically to test the effectiveness of their functional vascular reconnection in relation to incompatibility-compatibility relationships that these genotypes exhibit in the field. The incompatible heterograft (B/EMC) showed a marked delay in internode cohesion compared with the autografts (both B/B and BH/BH) and the compatible heterograft (BH/EMC). Even when fused, the translocation of [14C]-sorbitol from upper to lower internode was lower in B/EMC micrografts than in the other combinations. Epifluorescence studies performed with carboxyfluorescin, a specific phloem probe, indicated that the limited translocation was caused by a delay in the establishment of functional phloem continuity between the two internodes. In the B/EMC combination, new differentiated tracheary elements (TE) in the parenchyma tissue at the graft interface between the two internodes were not detected until 30 days after grafting, whereas in the BH/EMC heterograft and both autografts, new xylem connections appeared to cross the interface 20 days after grafting. Immunohistochemical detection (terminal nick-end labeling assay) of the number of cells undergoing nuclear DNA fragmentation at the graft interface confirmed that the limited and delayed TE differentiation in B/EMC heterografts was associated with a decrease in the activity of programmed cell death processes involved in the differentiation of TE.", "keywords": ["Pyrus", "0106 biological sciences", "0301 basic medicine", "03 medical and health sciences", "DNA", " Plant", "Plant Stems", "Xylem", "Apoptosis", "Photosynthate translocation; Programmed cell death; Tracheary elements", "Phloem", "Rosaceae", "01 natural sciences", "Trees"], "contacts": [{"organization": "L. Espen, M. Cocucci, G.A. Sacchi,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1093/treephys/25.11.1419"}, {"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/25.11.1419", "name": "item", "description": "10.1093/treephys/25.11.1419", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/25.11.1419"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-11-01T00:00:00Z"}}, {"id": "10.1093/treephys/tpaa058", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:18:16Z", "type": "Journal Article", "created": "2020-04-24", "title": "Timeline of autumn phenology in temperate deciduous trees", "description": "AbstractCessation of xylem formation or wood growth (CWG) and onset of foliar senescence (OFS) are key autumn phenological events in temperate deciduous trees. Their timing is fundamental for the development and survival of trees, ecosystem nutrient cycling and the seasonal exchange of matter and energy between the biosphere and atmosphere, and affects the impact and feedback of forests to global change. A large-scale experimental effort and improved observational methods have allowed us to compare the timing of CWG and OFS for different deciduous tree species in Western Europe, particularly in silver birch, a pioneer species, and European beech, a late-succession species, at stands of different latitudes, of different levels of site fertility, for 2 years with contrasting meteorological and drought conditions, i.e., the low moderately dry 2017 and the extremely dry 2018. Specifically, we tested whether foliar senescence started before, after or concurrently with CWG. Onset of foliar senescence and CWG occurred generally between late September and early November, with larger differences across species and sites for OFS. Foliar senescence started concurrently with CWG in most cases, except for the drier 2018 and, for beech, at the coldest site, where OFS occurred significantly later than CWG. The behavior of beech in Spain, the southern edge of its European distribution, was unclear, with no CWG, but very low wood growth at the time of OFS. Our study suggests that OFS is generally triggered by the same drivers of CWG or when wood growth decreases in late summer, indicating an overarching mechanism of sink limitation as a possible regulator of the timing of foliar senescence.
", "keywords": ["0106 biological sciences", "listna senescenca", "nastajanje lesa", "cambium", "info:eu-repo/classification/udc/630*18:630*8", "autumn phenology", " xylem formation", " foliar senescence", " cambium", " chlorophyll", " radial growth", " wood", " decidiuous trees", " common aspen", " common beech", " pedunculate oak", " silver birch", "01 natural sciences", "jesenska fenologija", " nastajanje lesa", " listna senescenca", " kambij", " klorofil", " debelinska rast", " les", " listavci", " trepetlika", " navadna bukev", " dob", " navadna breza", "trepetlika", "Trees", "navadna bukev", "klorofil", "les", "chlorophyll", "pedunculate oak", "Biology", "info:eu-repo/classification/udc/630*1", "Ecosystem", "xylem formation", "kambij", "silver birch", "Temperature", "sink limitation", "04 agricultural and veterinary sciences", "dob", "navadna breza", "15. Life on land", "debelinska rast", "common beech", "listavci", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "Europe", "Plant Leaves", "radial growth", "jesenska fenologija", "common aspen", "Spain", "13. Climate action", "foliar senescence", "wood growth", "0401 agriculture", " forestry", " and fisheries", "Seasons", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology", "autumn phenology", "decidiuous trees", "wood"]}, "links": [{"href": "https://doi.org/10.1093/treephys/tpaa058"}, {"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/tpaa058", "name": "item", "description": "10.1093/treephys/tpaa058", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/tpaa058"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-04-27T00:00:00Z"}}, {"id": "10.1093/treephys/tpaa175", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:18:16Z", "type": "Journal Article", "created": "2020-12-22", "title": "Drought elicits contrasting responses on the autumn dynamics of wood formation in late successional deciduous tree species", "description": "AbstractResearch on wood phenology has mainly focused on reactivation of the cambium in spring. In this study we investigated if summer drought advances cessation of wood formation and if it has any influence on wood structure in late successional forest trees of the temperate zone. The end of xylogenesis was monitored between August and November in stands of European beech and pedunculate oak in Belgium for two consecutive years, 2017 and 2018, with the latter year having experienced an exceptional summer drought. Wood formation in oak was affected by the drought, with oak trees ceasing cambial activity and wood maturation about 3\uffc2\uffa0weeks earlier in 2018 compared with 2017. Beech ceased wood formation before oak, but its wood phenology did not differ between years. Furthermore, between the 2\uffc2\uffa0years, no significant difference was found in ring width, percentage of mature fibers in the late season, vessel size and density. In 2018, beech did show thinner fiber walls, whereas oak showed thicker walls. In this paper, we showed that summer drought can have an important impact on late season wood phenology xylem development. This will help to better understand forest ecosystems and improve forest models.
", "keywords": ["580", "0106 biological sciences", "xylogenesis", "beech cessation of wood formation drought oak xylogenesis", "634", "drought", "15. Life on land", "cessation of wood formation", "Wood", "01 natural sciences", "6. Clean water", "Droughts", "Trees", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "Xylem", "13. Climate action", "oak", "Seasons", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology", "beech", "Biology", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1093/treephys/tpaa175"}, {"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/tpaa175", "name": "item", "description": "10.1093/treephys/tpaa175", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/tpaa175"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-02-22T00:00:00Z"}}, {"id": "10.1111/ppa.13835", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:18:58Z", "type": "Journal Article", "created": "2023-11-28", "title": "A high\u2010throughput analysis of high\u2010resolution X\u2010ray CT images of stems of olive and citrus plants resistant and susceptible to Xylella fastidiosa", "description": "AbstractThe bacterial plant pathogen Xylella fastidiosa causes disease in several globally important crops. However, some cultivars harbour reduced bacterial loads and express few symptoms. Evidence considering plant species in isolation suggests xylem structure influences cultivar susceptibility to X. fastidiosa. We test this theory more broadly by analysing high\uffe2\uff80\uff90resolution synchrotron X\uffe2\uff80\uff90ray computed tomography of healthy and infected plant vasculature from two taxonomic groups containing susceptible and resistant varieties: two citrus cultivars (sweet orange cv. Pera, tangor cv. Murcott) and two olive cultivars (Koroneiki, Leccino). Results found the susceptible plants had more vessels than resistant ones, which could promote within\uffe2\uff80\uff90host pathogen spread. However, features associated with resistance were not shared by citrus and olive. While xylem vessels in resistant citrus stems had comparable diameters to those in susceptible plants, resistant olives had narrower vessels that could limit biofilm spread. And while differences among olive cultivars were not detected, results suggest greater vascular connectivity in resistant compared to susceptible citrus plants. We hypothesize that this provides alternate flow paths for sustaining hydraulic functionality under infection. In summary, this work elucidates different physiological resistance mechanisms between two taxonomic groups, while supporting the existence of an intertaxonomical metric that could speed up the identification of candidate\uffe2\uff80\uff90resistant plants.Different phytohormones can act as root\uffe2\uff80\uff90to\uffe2\uff80\uff90shoot signalling molecules in response to soil drying. Recent findings suggest that root ABA levels are predominantly leaf\uffe2\uff80\uff90sourced and not locally synthesized, thus, ABA exported from the roots in the xylem is mostly recycled from the shoot. To explain the differential root hormone accumulation observed under partial rootzone drying (PRD) that imposes distinct dry and wet parts of the root zone, we grafted \uffe2\uff80\uff9ctwo\uffe2\uff80\uff90root, one\uffe2\uff80\uff90shoot\uffe2\uff80\uff9d soybean plants to independently assess xylem export of different phytohormones from either part of the root zone. Grafts were subjected to a combination of girdling (either part, all, or none of the rootzone) and irrigation (homogenously well\uffe2\uff80\uff90watered (WW) and PRD). PRD did not increase foliar ABA but decreased stomatal conductance, attributed to decreased leaf water potential and/or increased xylem sap ABA, JA, or ACC concentrations. In contrast, the foliar ABA increments that accompanied girdling\uffe2\uff80\uff90induced stomatal closure were proportional to the root fraction to which phloem transport was interrupted. Irrespective of girdling, root ABA accumulation (and xylem ABA export from) was highest in the dry PRD rootzone, xylem jasmonic acid (JA) in the wet PRD rootzone, and xylem ACC in both rootzones of PRD plants. Thus, soil drying of the dry root zone and transient overwatering of the wet root zone enhanced ACC export in PRD plants. We conclude that root water status during PRD enhances root ABA, JA and ACC synthesis and xylem export, independent of shoot\uffe2\uff80\uff90to\uffe2\uff80\uff90root transport.Understanding tree growth and carbon sequestration are of crucial interest to forecast the feedback of forests to climate change. To have a global understanding of the wood formation, it is necessary to develop new methodologies for xylogenesis measurements, valid across diverse wood structures and applicable to both angiosperms and gymnosperms. In this study, the authors present a new workflow to study xylogenesis using high-resolution X-ray computed tomography (HRXCT), which is generic and offers high potential for automatization. The HXRCT-based approach was benchmarked with the current classical approach (microtomy) on three tree species with contrasted wood anatomy (Pinus nigra, Fagus sylvatica, and Quercus robur). HRXCT proved to estimate the relevant xylogenesis parameters (timing, duration, and growth rates) across species with high accuracy. HRXCT showed to be an efficient avenue to investigate tree xylogenesis for a wide range of wood anatomies, structures, and species. HRXCT also showed its potential to provide quantification of intra-annual dynamics of biomass production through high-resolution 3D mapping of wood biomass within the forming growth ring.
", "keywords": ["0106 biological sciences", "[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics", "XYLEM", "tree growth", "secondary growth phenology", "Plant Science", "01 natural sciences", "7. Clean energy", "[SDV.BV.BOT] Life Sciences [q-bio]/Vegetal Biology/Botanics", "SB1-1110", "Tree growth", "Secondary growth phenology", "microtomy", "PHENOLOGY", "[SDV.BID.SPT] Life Sciences [q-bio]/Biodiversity/Systematics", " Phylogenetics and taxonomy", "FAGUS-SYLVATICA", "[SDV.EE.ECO] Life Sciences [q-bio]/Ecology", " environment/Ecosystems", "Biology", "TREE", "Xylogenesis", "580", "xylogenesis", "high-resolution X-ray computed tomography", "Biology and Life Sciences", "Plant culture", "Phylogenetics and taxonomy", "Microtomy", "[SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics", "15. Life on land", "BEECH", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "13. Climate action", "[SDV.EE.ECO]Life Sciences [q-bio]/Ecology", "PLANT STRUCTURE", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology", "environment/Ecosystems", "Engineering sciences. Technology"]}, "links": [{"href": "https://doi.org/10.3389/fpls.2021.698640"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Frontiers%20in%20Plant%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3389/fpls.2021.698640", "name": "item", "description": "10.3389/fpls.2021.698640", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3389/fpls.2021.698640"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-06T00:00:00Z"}}, {"id": "10261/276560", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:24:36Z", "type": "Journal Article", "created": "2020-04-24", "title": "Alternation of wet and dry sides during partial rootzone drying irrigation enhances leaf ethylene evolution", "description": "Soil drying increases endogenous ABA and ACC concentrations in planta, but how these compounds interact to regulate stomatal responses to soil drying and re-watering is still unclear. To determine the temporal dynamics and physiological significance of root, xylem and leaf ABA and ACC concentrations in response to deficit irrigation (DI) or partial rootzone drying (PRD-F) and re-watering, these variables were measured in plants exposed to similar whole pot soil water contents. Both DI and PRD-F plants received only a fraction of the irrigation supplied to well-watered (WW) plants, either to all (DI) or part (PRD-F) of the rootzone of plants grown in split-pots. Both DI and PRD-F induced partial stomatal closure, increased root ABA and ACC accumulation consistent with local soil water content, but did not affect xylem or leaf concentrations of these compounds compared to WW plants. Two hours after re-watering all (DI-RW) or part of the rootzone (PRD-A) to the same soil water content, stomatal conductance returned to WW values or further decreased respectively. Re-watering the whole rootzone had no effect on xylem and leaf ABA and ACC concentrations, while re-watering the dry side of the pot in PRD plants had no effect on xylem and leaf ABA concentrations but increased xylem and leaf ACC concentrations and leaf ethylene evolution. Leaf water potential was similar between all irrigation treatments, with stomatal conductance declining as xylem ABA concentrations and leaf ACC concentrations increased. Prior to re-watering PRD plants, accounting for the spatial differences in soil water uptake best explained variation in xylem ACC concentration suggesting root-to-shoot ACC signalling, but this model did not account for variation in xylem ACC concentration after re-watering the dry side of PRD plants. Thus local (foliar) and long-distance (root-to-shoot) variation in ACC status both seem important in regulating the temporal dynamics of foliar ethylene evolution in plants exposed to PRD.", "keywords": ["0106 biological sciences", "Irrigation", "Stomatal conductance", "Root-to-shoot signalling", "Ethylene", "Physiological significance", "Deficit irrigation", "Plant Science", "Leaf water", "F06 Irrigation", "01 natural sciences", "ACC", "Ecology", " Evolution", " Behavior and Systematics", "580", "2. Zero hunger", "Xylem", "15. Life on land", "F60 Plant physiology and biochemistry", "6. Clean water", "Horticulture", "13. Climate action", "Soil water", "Agronomy and Crop Science", "Soil moisture heterogeneity", "Partial rootzone drying"]}, "links": [{"href": "https://eprints.lancs.ac.uk/id/eprint/144510/1/Juan_EEB_Manuscript_final.pdf"}, {"href": "https://doi.org/10261/276560"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20and%20Experimental%20Botany", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10261/276560", "name": "item", "description": "10261/276560", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/276560"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-01T00:00:00Z"}}, {"id": "10261/355209", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:24:39Z", "type": "Journal Article", "created": "2023-11-27", "title": "A high\u2010throughput analysis of high\u2010resolution X\u2010ray CT images of stems of olive and citrus plants resistant and susceptible to Xylella fastidiosa", "description": "AbstractThe bacterial plant pathogen Xylella fastidiosa causes disease in several globally important crops. However, some cultivars harbour reduced bacterial loads and express few symptoms. Evidence considering plant species in isolation suggests xylem structure influences cultivar susceptibility to X . fastidiosa . We test this theory more broadly by analysing high\uffe2\uff80\uff90resolution synchrotron X\uffe2\uff80\uff90ray computed tomography of healthy and infected plant vasculature from two taxonomic groups containing susceptible and resistant varieties: two citrus cultivars (sweet orange cv. Pera, tangor cv. Murcott) and two olive cultivars (Koroneiki, Leccino). Results found the susceptible plants had more vessels than resistant ones, which could promote within\uffe2\uff80\uff90host pathogen spread. However, features associated with resistance were not shared by citrus and olive. While xylem vessels in resistant citrus stems had comparable diameters to those in susceptible plants, resistant olives had narrower vessels that could limit biofilm spread. And while differences among olive cultivars were not detected, results suggest greater vascular connectivity in resistant compared to susceptible citrus plants. We hypothesize that this provides alternate flow paths for sustaining hydraulic functionality under infection. In summary, this work elucidates different physiological resistance mechanisms between two taxonomic groups, while supporting the existence of an intertaxonomical metric that could speed up the identification of candidate\uffe2\uff80\uff90resistant plants. Different phytohormones can act as root\uffe2\uff80\uff90to\uffe2\uff80\uff90shoot signalling molecules in response to soil drying. Recent findings suggest that root ABA levels are predominantly leaf\uffe2\uff80\uff90sourced and not locally synthesized, thus, ABA exported from the roots in the xylem is mostly recycled from the shoot. To explain the differential root hormone accumulation observed under partial rootzone drying (PRD) that imposes distinct dry and wet parts of the root zone, we grafted \uffe2\uff80\uff9ctwo\uffe2\uff80\uff90root, one\uffe2\uff80\uff90shoot\uffe2\uff80\uff9d soybean plants to independently assess xylem export of different phytohormones from either part of the root zone. Grafts were subjected to a combination of girdling (either part, all, or none of the rootzone) and irrigation (homogenously well\uffe2\uff80\uff90watered (WW) and PRD). PRD did not increase foliar ABA but decreased stomatal conductance, attributed to decreased leaf water potential and/or increased xylem sap ABA, JA, or ACC concentrations. In contrast, the foliar ABA increments that accompanied girdling\uffe2\uff80\uff90induced stomatal closure were proportional to the root fraction to which phloem transport was interrupted. Irrespective of girdling, root ABA accumulation (and xylem ABA export from) was highest in the dry PRD rootzone, xylem jasmonic acid (JA) in the wet PRD rootzone, and xylem ACC in both rootzones of PRD plants. Thus, soil drying of the dry root zone and transient overwatering of the wet root zone enhanced ACC export in PRD plants. We conclude that root water status during PRD enhances root ABA, JA and ACC synthesis and xylem export, independent of shoot\uffe2\uff80\uff90to\uffe2\uff80\uff90root transport.Different phytohormones can act as root\uffe2\uff80\uff90to\uffe2\uff80\uff90shoot signalling molecules in response to soil drying. Recent findings suggest that root ABA levels are predominantly leaf\uffe2\uff80\uff90sourced and not locally synthesized, thus, ABA exported from the roots in the xylem is mostly recycled from the shoot. To explain the differential root hormone accumulation observed under partial rootzone drying (PRD) that imposes distinct dry and wet parts of the root zone, we grafted \uffe2\uff80\uff9ctwo\uffe2\uff80\uff90root, one\uffe2\uff80\uff90shoot\uffe2\uff80\uff9d soybean plants to independently assess xylem export of different phytohormones from either part of the root zone. Grafts were subjected to a combination of girdling (either part, all, or none of the rootzone) and irrigation (homogenously well\uffe2\uff80\uff90watered (WW) and PRD). PRD did not increase foliar ABA but decreased stomatal conductance, attributed to decreased leaf water potential and/or increased xylem sap ABA, JA, or ACC concentrations. In contrast, the foliar ABA increments that accompanied girdling\uffe2\uff80\uff90induced stomatal closure were proportional to the root fraction to which phloem transport was interrupted. Irrespective of girdling, root ABA accumulation (and xylem ABA export from) was highest in the dry PRD rootzone, xylem jasmonic acid (JA) in the wet PRD rootzone, and xylem ACC in both rootzones of PRD plants. Thus, soil drying of the dry root zone and transient overwatering of the wet root zone enhanced ACC export in PRD plants. We conclude that root water status during PRD enhances root ABA, JA and ACC synthesis and xylem export, independent of shoot\uffe2\uff80\uff90to\uffe2\uff80\uff90root transport.