{"type": "FeatureCollection", "features": [{"id": "10.1007/s004420050375", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:14:50Z", "type": "Journal Article", "created": "2002-08-25", "title": "Response Of Soil Biota To Elevated Atmospheric Co 2 In Poplar Model Systems", "description": "We tested the hypotheses that increased belowground allocation of carbon by hybrid poplar saplings grown under elevated atmospheric CO2 would increase mass or turnover of soil biota in bulk but not in rhizosphere soil. Hybrid poplar saplings (Populus\u00d7euramericana cv. Eugenei) were grown for 5 months in open-bottom root boxes at the University of Michigan Biological Station in northern, lower Michigan. The experimental design was a randomized-block design with factorial combinations of high or low soil N and ambient (34 Pa) or elevated (69 Pa) CO2 in five blocks. Rhizosphere microbial biomass carbon was 1.7 times greater in high-than in low-N soil, and did not respond to elevated CO2. The density of protozoa did not respond to soil N but increased marginally (P\u2009<\u20090.06) under elevated CO2. Only in high-N soil did arbuscular mycorrhizal fungi and microarthropods respond to CO2. In high-N soil, arbuscular mycorrhizal root mass was twice as great, and extramatrical hyphae were 11% longer in elevated than in ambient CO2 treatments. Microarthropod density and activity were determined in situ using minirhizotrons. Microarthropod density did not change in response to elevated CO2, but in high-N soil, microarthropods were more strongly associated with fine roots under elevated than ambient treatments. Overall, in contrast to the hypotheses, the strongest response to elevated atmospheric CO2 was in the rhizosphere where (1) unchanged microbial biomass and greater numbers of protozoa (P\u2009<\u20090.06) suggested faster bacterial turnover, (2) arbuscular mycorrhizal root length increased, and (3) the number of microarthropods observed on fine roots rose.", "keywords": ["0106 biological sciences", "2. Zero hunger", "Arbuscular Mycorrhizas", "Microarthropods", "Science", "Ecology and Evolutionary Biology", "Natural Resources and Environment", "Molecular", "04 agricultural and veterinary sciences", "15. Life on land", "Roots", "01 natural sciences", "Microbial Biomass", "Legacy", "Health Sciences", "0401 agriculture", " forestry", " and fisheries", "Key Words Atmospheric CO2", "Cellular and Developmental Biology"], "contacts": [{"organization": "Treonis, Amy, Lussenhop, John, Teeri, James A., Curtis, Peter S., Vogel, Christoph S.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s004420050375"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s004420050375", "name": "item", "description": "10.1007/s004420050375", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s004420050375"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-01-09T00:00:00Z"}}, {"id": "10.1007/s10533-015-0159-3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:15:03Z", "type": "Journal Article", "created": "2015-12-17", "title": "Mediation Of Soil C Decomposition By Arbuscular Mycorrizhal Fungi In Grass Rhizospheres Under Elevated Co2", "description": "Arbuscular mycorrhizal (AMF) function has mostly been studied from the plant perspective, but there is a shortage of empirical assessments of their ecosystem level impacts on soil carbon (C). Our understanding of the role of AMF on C processing belowground has been restricted mostly to fresh plant residues, not stabilized soil organic matter. The mechanisms by which elevated CO2 (eCO2) alter soil C remain an open question but AMF likely play a role via C and nutrients, which could in turn, be plant species dependent. We assessed AMF as mediators of C processing in the rhizosphere of two grasses under eCO2. We exposed a C4 and a C3 grass to a combination of ambient and eCO2 with and without modification of the AMF communities and using stable isotopes quantified the respiration of native soil C (as rhizosphere priming), its contribution to dissolved and microbial C and the final remaining C pool. The AMF treatment impacted soil C respiration under the C3-plant and only under eCO2. eCO2 suppressed decomposition (negative priming) but this effect disappeared when the AMF community was reduced. In contrast to studies of fresh plant residues suggesting that AMF can enhance C loss, our observations indicate that AMF may promote C storage in the soil organic matter pool. Results support that AMF can mediate the effect of eCO2 on soil C in the rhizosphere of some plant species, a potential mechanism explaining variation in impacts of eCO2 on soil C storage and C balances across species and ecosystems.", "keywords": ["vesicular-arbuscular mycorrhizas", "580", "2. Zero hunger", "grasses", "13. Climate action", "XXXXXX - Unknown", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "rhizosphere", "biodegradation"]}, "links": [{"href": "https://doi.org/10.1007/s10533-015-0159-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Biogeochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10533-015-0159-3", "name": "item", "description": "10.1007/s10533-015-0159-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10533-015-0159-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-12-17T00:00:00Z"}}, {"id": "10.17863/cam.81466", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:19:58Z", "type": "Journal Article", "created": "2022-01-19", "title": "Multimodal correlative imaging and modelling of phosphorus uptake from soil by hyphae of mycorrhizal fungi", "description": "Summary

Phosphorus (P) is essential for plant growth. Arbuscular mycorrhizal fungi (AMF) aid its uptake by acquiring P from sources distant from roots in return for carbon. Little is known about how AMF colonise soil pore\uffe2\uff80\uff90space, and models of AMF\uffe2\uff80\uff90enhanced P\uffe2\uff80\uff90uptake are poorly validated.

We used synchrotron X\uffe2\uff80\uff90ray computed tomography to visualize mycorrhizas in soil and synchrotron X\uffe2\uff80\uff90ray fluorescence/X\uffe2\uff80\uff90ray absorption near edge structure (XRF/XANES) elemental mapping for P, sulphur (S) and aluminium (Al) in combination with modelling.

We found that AMF inoculation had a suppressive effect on colonisation by other soil fungi and identified differences in structure and growth rate between hyphae of AMF and nonmycorrhizal fungi. Our results showed that AMF co\uffe2\uff80\uff90locate with areas of high P and low Al, and preferentially associate with organic\uffe2\uff80\uff90type P species over Al\uffe2\uff80\uff90rich inorganic P.

We discovered that AMF avoid Al\uffe2\uff80\uff90rich areas as a source of P. Sulphur\uffe2\uff80\uff90rich regions were found to be correlated with higher hyphal density and an increased organic\uffe2\uff80\uff90associated P\uffe2\uff80\uff90pool, whilst oxidized S\uffe2\uff80\uff90species were found close to AMF hyphae. Increased S oxidation close to AMF suggested the observed changes were microbiome\uffe2\uff80\uff90related. Our experimentally\uffe2\uff80\uff90validated model led to an estimate of P\uffe2\uff80\uff90uptake by AMF hyphae that is an order of magnitude lower than rates previously estimated \uffe2\uff80\uff93 a result with significant implications for the modelling of plant\uffe2\uff80\uff93soil\uffe2\uff80\uff93AMF interactions.

", "keywords": ["580", "X-ray computed tomography", "570", "Research", "X-ray fluorescence", "Fungi", "Hyphae", "500", "Phosphorus", "mycorrhizas", "04 agricultural and veterinary sciences", "15. Life on land", "plant phosphorus uptake", "Plant Roots", "Soil", "rhizosphere modelling", "Mycorrhizae", "synchrotron", "0401 agriculture", " forestry", " and fisheries", "Soil Microbiology"]}, "links": [{"href": "https://eprints.soton.ac.uk/454110/1/Keyes_et_al_Myco_Paper_TR_04_01_2022_unmarked.pdf"}, {"href": "https://eprints.soton.ac.uk/454110/2/Figures_TR_22_12_2021.pdf"}, {"href": "https://eprints.soton.ac.uk/454110/3/SI_1_TR_22_12_2021_no_markup.pdf"}, {"href": "https://eprints.soton.ac.uk/454110/4/SI_2_TR_22_12_2021.pdf"}, {"href": "https://doi.org/10.17863/cam.81466"}, {"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": "10.17863/cam.81466", "name": "item", "description": "10.17863/cam.81466", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.17863/cam.81466"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-02-15T00:00:00Z"}}, {"id": "10.1016/j.ejsobi.2010.04.003", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:16:10Z", "type": "Journal Article", "created": "2010-04-26", "title": "Seasonal Dynamics Of The Physicochemical And Biological Properties Of Soils In Naturally Regenerating, Unmanaged And Clear-Cut Beech Stands In Northern Spain", "description": "The physicochemical and biological properties of soils within an unmanaged beech stand and two stands clear-cut in 2001 or 1996 were studied and compared across the year 2008. The clear-cut stands were left to naturally regenerate and exhibited very different levels of tree density. Soil from the stand clear-cut in 2001 had the lowest contents of organic matter and nitrogen, showed high resistance to penetration and the pH varied throughout the seasons. Basal respiration achieved minimum values in summer in both the unmanaged stand and the stand clear-cut in 1996. However, basal respiration slightly fluctuated from spring to autumn in the stand clear-cut in 2001. The seasonal dynamics of protease and phosphatase activities were similar within the three stands: the maximum protease activity was detected in spring and the highest phophatase activity in winter. \u03b2-Glucosidase activity in autumn and dehydrogenase in winter were greater in the unmanaged than in the clear-cut stands. Moreover, dehydrogenase activity was extremely low in the stand clear-cut in 1996. Microclimatic parameters within the stands were significantly correlated with several biological properties of soils, with microclimate being strongly determined by the density of trees. Results also suggested that ectomycorrhizal fungi would be key components of the soil microflora in the beech forests.", "keywords": ["0106 biological sciences", "Clear-cutting", "Beech forests", "0401 agriculture", " forestry", " and fisheries", "Ectomycorrhizas", "Soil basal respiration", "04 agricultural and veterinary sciences", "Soil enzymatic activities", "15. Life on land", "01 natural sciences", "Soil physicochemical properties"]}, "links": [{"href": "https://doi.org/10.1016/j.ejsobi.2010.04.003"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/European%20Journal%20of%20Soil%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.ejsobi.2010.04.003", "name": "item", "description": "10.1016/j.ejsobi.2010.04.003", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.ejsobi.2010.04.003"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-05-01T00:00:00Z"}}, {"id": "10.1111/gcb.15277", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:18:46Z", "type": "Journal Article", "created": "2020-07-12", "title": "Low phosphorus supply constrains plant responses to elevated CO 2 : A meta\u2010analysis", "description": "Abstract

Phosphorus (P) is an essential macro\uffe2\uff80\uff90nutrient required for plant metabolism and growth. Low P availability could potentially limit plant responses to elevated carbon dioxide (eCO2), but consensus has yet to be reached on the extent of this limitation. Here, based on data from experiments that manipulated both CO2 and P for young individuals of woody and non\uffe2\uff80\uff90woody species, we present a meta\uffe2\uff80\uff90analysis of P limitation impacts on plant growth, physiological, and morphological response to eCO2. We show that low P availability attenuated plant photosynthetic response to eCO2 by approximately one\uffe2\uff80\uff90quarter, leading to a reduced, but still positive photosynthetic response to eCO2 compared to those under high P availability. Furthermore, low P limited plant aboveground, belowground, and total biomass responses to eCO2, by 14.7%, 14.3%, and 12.4%, respectively, equivalent to an approximate halving of the eCO2 responses observed under high P availability. In comparison, low P availability did not significantly alter the eCO2\uffe2\uff80\uff90induced changes in plant tissue nutrient concentration, suggesting tissue nutrient flexibility is an important mechanism allowing biomass response to eCO2 under low P availability. Low P significantly reduced the eCO2\uffe2\uff80\uff90induced increase in leaf area by 14.3%, mirroring the aboveground biomass response, but low P did not affect the eCO2\uffe2\uff80\uff90induced increase in root length. Woody plants exhibited stronger attenuation effect of low P on aboveground biomass response to eCO2 than non\uffe2\uff80\uff90woody plants, while plants with different mycorrhizal associations showed similar responses to low P and eCO2 interaction. This meta\uffe2\uff80\uff90analysis highlights crucial data gaps in capturing plant responses to eCO2 and low P availability. Field\uffe2\uff80\uff90based experiments with longer\uffe2\uff80\uff90term exposure of both CO2 and P manipulations are critically needed to provide ecosystem\uffe2\uff80\uff90scale understanding. Taken together, our results provide a quantitative baseline to constrain model\uffe2\uff80\uff90based hypotheses of plant responses to eCO2 under P limitation, thereby improving projections of future global change impacts.

", "keywords": ["0106 biological sciences", "910", "01 natural sciences", "XXXXXX - Unknown", "soil phosphorus", "Humans", "phosphorus", "Photosynthesis", "mycorrhizae", "soils", "Ecosystem", "0105 earth and related environmental sciences", "580", "nutrient concentration", "2. Zero hunger", "plant morphology", "biomass", "plants", "carbon dioxide", "Phosphorus", "mycorrhizas", "04 agricultural and veterinary sciences", "Carbon Dioxide", "Plants", "15. Life on land", "leaf gas exchange", "meta-analysis", "plant nutrient uptake", "0401 agriculture", " forestry", " and fisheries"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15277"}, {"href": "https://doi.org/10.1111/gcb.15277"}, {"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.15277", "name": "item", "description": "10.1111/gcb.15277", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.15277"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-07-31T00:00:00Z"}}, {"id": "10.1111/j.1469-8137.2011.03776.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:18:59Z", "type": "Journal Article", "created": "2011-06-08", "title": "Seven Years Of Carbon Dioxide Enrichment, Nitrogen Fertilization And Plant Diversity Influence Arbuscular Mycorrhizal Fungi In A Grassland Ecosystem", "description": "\u2022 We tested the prediction that the abundance and diversity of arbuscular mycorrhizal (AM) fungi are influenced by resource availability and plant community composition by examining the joint effects of carbon dioxide (CO(2) ) enrichment, nitrogen (N) fertilization and plant diversity on AM fungi. \u2022 We quantified AM fungal spores and extramatrical hyphae in 176 plots after 7 yr of treatment with all combinations of ambient or elevated CO(2) (368 or 560 ppm), with or without N fertilization (0 or 4 g Nm(-2) ), and one (monoculture) or 16 host plant species (polyculture) in the BioCON field experiment at Cedar Creek Ecosystem Science Reserve, Minnesota, USA. \u2022 Extramatrical hyphal lengths were increased by CO(2) enrichment, whereas AM spore abundance decreased with N fertilization. Spore abundance, morphotype richness and extramatrical hyphal lengths were all greater in monoculture plots. A structural equation model showed AM fungal biovolume was most influenced by CO(2) enrichment, plant community composition and plant richness, whereas spore richness was most influenced by fungal biovolume, plant community composition and plant richness. \u2022 Arbuscular mycorrhizal fungi responded to differences in host community and resource availability, suggesting that mycorrhizal functions, such as carbon sequestration and soil stability, will be affected by global change.", "keywords": ["0106 biological sciences", "Nitrogen", "Minnesota", "Hyphae", "Poaceae", "Models", " Biological", "01 natural sciences", "nitrogen", "Soil", "Mycorrhizae", "Biomass", "Fertilizers", "Ecosystem", "Soil Microbiology", "vesicular-arbuscular mycorrhizas", "580", "2. Zero hunger", "grassland ecology", "grasslands", "carbon dioxide", "Biodiversity", "04 agricultural and veterinary sciences", "Carbon Dioxide", "Spores", " Fungal", "15. Life on land", "plant diversity", "0401 agriculture", " forestry", " and fisheries", "Plant Shoots"]}, "links": [{"href": "https://doi.org/10.1111/j.1469-8137.2011.03776.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.1469-8137.2011.03776.x", "name": "item", "description": "10.1111/j.1469-8137.2011.03776.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1469-8137.2011.03776.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-06-08T00:00:00Z"}}, {"id": "10.1111/nph.17980", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:19:06Z", "type": "Journal Article", "created": "2022-01-19", "title": "Multimodal correlative imaging and modelling of phosphorus uptake from soil by hyphae of mycorrhizal fungi", "description": "Summary

Phosphorus (P) is essential for plant growth. Arbuscular mycorrhizal fungi (AMF) aid its uptake by acquiring P from sources distant from roots in return for carbon. Little is known about how AMF colonise soil pore\uffe2\uff80\uff90space, and models of AMF\uffe2\uff80\uff90enhanced P\uffe2\uff80\uff90uptake are poorly validated.

We used synchrotron X\uffe2\uff80\uff90ray computed tomography to visualize mycorrhizas in soil and synchrotron X\uffe2\uff80\uff90ray fluorescence/X\uffe2\uff80\uff90ray absorption near edge structure (XRF/XANES) elemental mapping for P, sulphur (S) and aluminium (Al) in combination with modelling.

We found that AMF inoculation had a suppressive effect on colonisation by other soil fungi and identified differences in structure and growth rate between hyphae of AMF and nonmycorrhizal fungi. Our results showed that AMF co\uffe2\uff80\uff90locate with areas of high P and low Al, and preferentially associate with organic\uffe2\uff80\uff90type P species over Al\uffe2\uff80\uff90rich inorganic P.

We discovered that AMF avoid Al\uffe2\uff80\uff90rich areas as a source of P. Sulphur\uffe2\uff80\uff90rich regions were found to be correlated with higher hyphal density and an increased organic\uffe2\uff80\uff90associated P\uffe2\uff80\uff90pool, whilst oxidized S\uffe2\uff80\uff90species were found close to AMF hyphae. Increased S oxidation close to AMF suggested the observed changes were microbiome\uffe2\uff80\uff90related. Our experimentally\uffe2\uff80\uff90validated model led to an estimate of P\uffe2\uff80\uff90uptake by AMF hyphae that is an order of magnitude lower than rates previously estimated \uffe2\uff80\uff93 a result with significant implications for the modelling of plant\uffe2\uff80\uff93soil\uffe2\uff80\uff93AMF interactions.

Contents Summary 507 I. Introduction 507 II. The return on investment approach 508 III. CO2 response spectrum 510 IV. Discussion 516 Acknowledgements 518 References 518

Summary

Land ecosystems sequester on average about a quarter of anthropogenic CO2 emissions. It has been proposed that nitrogen (N) availability will exert an increasingly limiting effect on plants\uffe2\uff80\uff99 ability to store additional carbon (C) under rising CO2, but these mechanisms are not well understood. Here, we review findings from elevated CO2 experiments using a plant economics framework, highlighting how ecosystem responses to elevated CO2 may depend on the costs and benefits of plant interactions with mycorrhizal fungi and symbiotic N\uffe2\uff80\uff90fixing microbes. We found that N\uffe2\uff80\uff90acquisition efficiency is positively correlated with leaf\uffe2\uff80\uff90level photosynthetic capacity and plant growth, and negatively with soil C storage. Plants that associate with ectomycorrhizal fungi and N\uffe2\uff80\uff90fixers may acquire N at a lower cost than plants associated with arbuscular mycorrhizal fungi. However, the additional growth in ectomycorrhizal plants is partly offset by decreases in soil C pools via priming. Collectively, our results indicate that predictive models aimed at quantifying C cycle feedbacks to global change may be improved by treating N as a resource that can be acquired by plants in exchange for energy, with different costs depending on plant interactions with microbial symbionts.

", "keywords": ["plant-soil relationships", "0106 biological sciences", "570", "Nitrogen", "Plant Biology & Botany", "01 natural sciences", "nitrogen", "Soil", "XXXXXX - Unknown", "soil organic matter (SOM)", "Biomass", "soil carbon", "N2-fixation", "Free-Air CO2 enrichment (FACE)", "Ecosystem", "580", "2. Zero hunger", "photosynthesis", "500", "carbon dioxide", "mycorrhizas", "04 agricultural and veterinary sciences", "humus", "06 Biological Sciences", "Carbon Dioxide", "15. Life on land", "Carbon", "13. Climate action", "CO 2", "0401 agriculture", " forestry", " and fisheries", "07 Agricultural And Veterinary Sciences"]}, "links": [{"href": "https://nph.onlinelibrary.wiley.com/doi/pdf/10.1111/nph.14872"}, {"href": "https://doi.org/10.1111/nph.14872"}, {"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.14872", "name": "item", "description": "10.1111/nph.14872", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/nph.14872"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-11-06T00:00:00Z"}}, {"id": "10.1111/nph.20145", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:19:07Z", "type": "Journal Article", "created": "2024-10-01", "title": "What determines transfer of carbon from plants to mycorrhizal fungi?", "description": "Summary

Biological Market Models are common evolutionary frameworks to understand the maintenance of mutualism in mycorrhizas. \uffe2\uff80\uff98Surplus C\uffe2\uff80\uff99 hypotheses provide an alternative framework where stoichiometry and source\uffe2\uff80\uff93sink dynamics govern mycorrhizal function. A critical difference between these frameworks is whether carbon transfer from plants is regulated by nutrient transfer from fungi or through source\uffe2\uff80\uff93sink dynamics. In this review, we: provide a historical perspective; summarize studies that asked whether plants transfer more carbon to fungi that transfer more nutrients; conduct a meta\uffe2\uff80\uff90analysis to assess whether mycorrhizal plant growth suppressions are related to carbon transfer; and review literature on cellular mechanisms for carbon transfer. In sum, current knowledge does not indicate that carbon transfer from plants is directly regulated by nutrient delivery from fungi. Further, mycorrhizal plant growth responses were linked to nutrient uptake rather than carbon transfer. These findings are more consistent with \uffe2\uff80\uff98Surplus C\uffe2\uff80\uff99 hypotheses than Biological Market Models. However, we also identify research gaps, and future research may uncover a mechanism directly linking carbon and nutrient transfer. Until then, we urge caution when applying economic terminology to describe mycorrhizas. We present a synthesis of ideas, consider knowledge gaps, and suggest experiments to advance the field.", "keywords": ["2. Zero hunger", "host specifity", "Ecology", "plant-soil feedback", "FOS: Biological sciences", "mycorrhizas", "15. Life on land", "ecology", "microbial interactions", "plant pathogens", "saprotrophs"], "contacts": [{"organization": "Semchenko, Marina, Barry, Kathryn E., de Vries, Franciska T., Mommer, Liesje, Moora, Mari, Maci\u00e1-Vicente, Jose G.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.6084/m9.figshare.19169609"}, {"rel": "self", "type": "application/geo+json", "title": "10.6084/m9.figshare.19169609", "name": "item", "description": "10.6084/m9.figshare.19169609", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.6084/m9.figshare.19169609"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-01T00:00:00Z"}}, {"id": "10.6084/m9.figshare.19169609.v1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:24:21Z", "type": "Dataset", "created": "2022-05-16", "title": "Data and code from Semchenko et al. (2022) New Phytologist 10.1111/nph.18118", "description": "Open AccessData and code used in Semchenko M, Barry KE, de Vries FT, Mommer L, Maci\u00e1-Vicente JG (2022) Deciphering the role of specialist and generalist plant\u2013microbial interactions as drivers of plant\u2013soil feedback. New Phytologist, 10.1111/nph.18118 for the analysis of host ranges across plant-associated fungal and oomycete guilds.
", "keywords": ["2. Zero hunger", "host specifity", "Ecology", "plant-soil feedback", "FOS: Biological sciences", "mycorrhizas", "15. Life on land", "ecology", "microbial interactions", "plant pathogens", "saprotrophs"], "contacts": [{"organization": "Semchenko, Marina, Barry, Kathryn E., de Vries, Franciska T., Mommer, Liesje, Moora, Mari, Maci\u00e1-Vicente, Jose G.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.6084/m9.figshare.19169609.v1"}, {"rel": "self", "type": "application/geo+json", "title": "10.6084/m9.figshare.19169609.v1", "name": "item", "description": "10.6084/m9.figshare.19169609.v1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.6084/m9.figshare.19169609.v1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-01T00:00:00Z"}}, {"id": "10044/1/54311", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-25T16:24:34Z", "type": "Journal Article", "created": "2017-11-06", "title": "Ecosystem responses to elevated CO2 governed by plant\u2013soil interactions and the cost of nitrogen acquisition", "description": "

Contents Summary 507 I. Introduction 507 II. The return on investment approach 508 III. CO2 response spectrum 510 IV. Discussion 516 Acknowledgements 518 References 518

Summary

Land ecosystems sequester on average about a quarter of anthropogenic CO2 emissions. It has been proposed that nitrogen (N) availability will exert an increasingly limiting effect on plants\uffe2\uff80\uff99 ability to store additional carbon (C) under rising CO2, but these mechanisms are not well understood. Here, we review findings from elevated CO2 experiments using a plant economics framework, highlighting how ecosystem responses to elevated CO2 may depend on the costs and benefits of plant interactions with mycorrhizal fungi and symbiotic N\uffe2\uff80\uff90fixing microbes. We found that N\uffe2\uff80\uff90acquisition efficiency is positively correlated with leaf\uffe2\uff80\uff90level photosynthetic capacity and plant growth, and negatively with soil C storage. Plants that associate with ectomycorrhizal fungi and N\uffe2\uff80\uff90fixers may acquire N at a lower cost than plants associated with arbuscular mycorrhizal fungi. However, the additional growth in ectomycorrhizal plants is partly offset by decreases in soil C pools via priming. Collectively, our results indicate that predictive models aimed at quantifying C cycle feedbacks to global change may be improved by treating N as a resource that can be acquired by plants in exchange for energy, with different costs depending on plant interactions with microbial symbionts.Biological Market Models are common evolutionary frameworks to understand the maintenance of mutualism in mycorrhizas. \uffe2\uff80\uff98Surplus C\uffe2\uff80\uff99 hypotheses provide an alternative framework where stoichiometry and source\uffe2\uff80\uff93sink dynamics govern mycorrhizal function. A critical difference between these frameworks is whether carbon transfer from plants is regulated by nutrient transfer from fungi or through source\uffe2\uff80\uff93sink dynamics. In this review, we: provide a historical perspective; summarize studies that asked whether plants transfer more carbon to fungi that transfer more nutrients; conduct a meta\uffe2\uff80\uff90analysis to assess whether mycorrhizal plant growth suppressions are related to carbon transfer; and review literature on cellular mechanisms for carbon transfer. In sum, current knowledge does not indicate that carbon transfer from plants is directly regulated by nutrient delivery from fungi. Further, mycorrhizal plant growth responses were linked to nutrient uptake rather than carbon transfer. These findings are more consistent with \uffe2\uff80\uff98Surplus C\uffe2\uff80\uff99 hypotheses than Biological Market Models. However, we also identify research gaps, and future research may uncover a mechanism directly linking carbon and nutrient transfer. Until then, we urge caution when applying economic terminology to describe mycorrhizas. We present a synthesis of ideas, consider knowledge gaps, and suggest experiments to advance the field.

Phosphorus (P) is essential for plant growth. Arbuscular mycorrhizal fungi (AMF) aid its uptake by acquiring P from sources distant from roots in return for carbon. Little is known about how AMF colonise soil pore\uffe2\uff80\uff90space, and models of AMF\uffe2\uff80\uff90enhanced P\uffe2\uff80\uff90uptake are poorly validated.

We used synchrotron X\uffe2\uff80\uff90ray computed tomography to visualize mycorrhizas in soil and synchrotron X\uffe2\uff80\uff90ray fluorescence/X\uffe2\uff80\uff90ray absorption near edge structure (XRF/XANES) elemental mapping for P, sulphur (S) and aluminium (Al) in combination with modelling.

We found that AMF inoculation had a suppressive effect on colonisation by other soil fungi and identified differences in structure and growth rate between hyphae of AMF and nonmycorrhizal fungi. Our results showed that AMF co\uffe2\uff80\uff90locate with areas of high P and low Al, and preferentially associate with organic\uffe2\uff80\uff90type P species over Al\uffe2\uff80\uff90rich inorganic P.

We discovered that AMF avoid Al\uffe2\uff80\uff90rich areas as a source of P. Sulphur\uffe2\uff80\uff90rich regions were found to be correlated with higher hyphal density and an increased organic\uffe2\uff80\uff90associated P\uffe2\uff80\uff90pool, whilst oxidized S\uffe2\uff80\uff90species were found close to AMF hyphae. Increased S oxidation close to AMF suggested the observed changes were microbiome\uffe2\uff80\uff90related. Our experimentally\uffe2\uff80\uff90validated model led to an estimate of P\uffe2\uff80\uff90uptake by AMF hyphae that is an order of magnitude lower than rates previously estimated \uffe2\uff80\uff93 a result with significant implications for the modelling of plant\uffe2\uff80\uff93soil\uffe2\uff80\uff93AMF interactions.