{"type": "FeatureCollection", "features": [{"id": "10.1016/j.soilbio.2023.109259", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:17:08Z", "type": "Journal Article", "created": "2023-12-01", "title": "A pulse of simulated root exudation alters the composition and temporal dynamics of microbial metabolites in its immediate vicinity", "description": "Root exudation increases the concentration of readily available carbon (C) compounds in its immediate environment. This creates \u2018hotspots\u2019 of microbial activity characterized by accelerated soil organic matter turnover with direct implications for nutrient availability for plants. However, our knowledge of the microbial metabolic processes occurring in the immediate vicinity of roots during and after a root exudation event is still limited.<br/><br/>Using reverse microdialysis, we simulated root exudation by releasing a13C-labelled mix of low-molecular-weight organic C compounds at mm-sized locations in undisturbed soil. Combined with stable isotope tracing, we investigated the fine-scale temporal and spatial response of microbial metabolism, soil chemistry, and traced microbial respiration and uptake of exuded compounds.<br/><br/>Our results show that a 9-h simulated root exudation pulse leads to i) a large local respiration event and ii) alteration of the temporal dynamics of soil metabolites over the following 12\u202fday\u202fat the exudation spot. Notably, we observed a threefold increase in ammonium concentrations at 12\u202fh and increased nitrate concentrations five days after the pulse. Moreover, various short-chain fatty acids (acetate, propionate, formate) increased over the following days, indicating altered microbial metabolic pathways and activity. Phospholipid and neutral lipid fatty acids (PLFAs, NLFAs) of all major microbial groups were significantly 13C-enriched within a 5\u202fmm radius around the microdialysis probes, but not beyond. The highest relative 13C enrichment was observed in fungal NLFAs, indicating that a significant proportion of the exuded compounds had been incorporated into fungal storage compounds.<br/><br/>Our findings indicate that the punctual release of low-molecular-weight organic C compounds into intact soil significantly changes microbial metabolism and activity in its immediate surroundings, enhancing mineralization of native organic nitrogen. This highlights the versatility of microbial metabolic pathways in response to rapidly changing C availability and their effectiveness in increasing nutrient availability near plant roots.", "keywords": ["Oxygen depletion", "2. Zero hunger", "570", "106022 Mikrobiologie", "Root exudation", "short-chain fatty acids", "Reverse microdialysis", "reverse microdialysis", "[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study", "15. Life on land", "root exudation", "6. Clean water", "Short-chain fatty acids", "Sugar metabolism", "106026 \u00d6kosystemforschung", "thizosphere priming effect", "crabtree effect", "sugar metabolism", "106022 Microbiology", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study", "106026 Ecosystem research", "Rhizosphere priming effect"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2023.109259"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2023.109259", "name": "item", "description": "10.1016/j.soilbio.2023.109259", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2023.109259"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-02-01T00:00:00Z"}}, {"id": "10.5061/dryad.040jp22", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:21:37Z", "type": "Dataset", "title": "Data from: Plant economic strategies of grassland species control soil carbon dynamics through rhizodeposition", "description": "unspecified1. The plant economics spectrum is increasingly recognized as a major  determinant of plant species effects on terrestrial ecosystem functioning  related to carbon cycling. However, the role of plant economic strategies  in the effects of living root activity on soil organic carbon (SOC)  dynamics through rhizodeposition remains unexplored, despite SOC being the  largest terrestrial carbon pool. 2. Using a continuous 13C-labeling method  allowing partitioning of plant and soil sources to carbon fluxes and  pools, we studied here the linkages between plant economic strategies and  SOC cycling processes in a \u2018common garden\u2019 greenhouse experiment. It  includes a panel of 12 grassland species selected along a gradient of  economic traits and belonging to three functionnal groups (C3 grasses,  forbs and legumes). 3. All species induced an acceleration of native SOC  mineralization but this rhizosphere priming effect (RPE) substantially  differed across species and varied eleven-fold by the end of the  experiment (from +26 to +295 % relative to unplanted soil). Interspecific  variation in RPE was primarily linked to plant photosynthetic activity  associated to species economic strategies of light and CO2 resource  acquisition and processing. Fast-growing acquisitive species, such as  legumes, featured large RPE, in relation with their high canopy  photosynthesis coupled to high leaf photosynthetic capacity and large net  primary productivity allocated aboveground. This large RPE was further  associated with high root metabolic activity, rhizodeposition and soil  microbial activity. In contrast, fine-root growth and economic traits  related to soil resource foraging ability were poor predictors of RPE. 4.  The formation of new root-derived SOC varied nine-fold across species and  was similarly positively related to the net primary productivity allocated  aboveground. Fast-growing acquisitive species with a high photosynthetic  activity induced a disproportionately large RPE relative to SOC formation.  5. Synthesis. Overall, our study demonstrates that rhizodeposition is a  major mechanism through which plant economic strategies of grassland  species control soil carbon dynamics. Acquisitive versus conservative  species were associated with high versus low rates of photosynthesis and  rhizodeposition, in turn leading to fast versus slow SOC turnover. This  emphasizes the importance of considering rhizosphere processes for  understanding plant species effects on soil biogeochemistry.", "keywords": ["2. Zero hunger", "Chamerion angustifolium", "Nardus stricta", "plant-soil (below-ground) interactions", "Festuca rubra", "Melilotus albus", "15. Life on land", "Rumex acetosa", "rhizosphere processes", "plant economics spectrum", "leaf and root traits", "Vicia cracca", "Lotus corniculatus", "Plantago lanceolata", "Taraxacum officinale", "Poa trivialis", "Photosynthesis", "Anthoxanthum odoratum", "Rhizosphere priming effect"], "contacts": [{"organization": "Henneron, Ludovic, Cros, Camille, Picon-Cochard, Catherine, Rahimian, Vida, Fontaine, S\u00e9bastien,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.040jp22"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.040jp22", "name": "item", "description": "10.5061/dryad.040jp22", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.040jp22"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-12-01T00:00:00Z"}}, {"id": "10.5061/dryad.sbcc2frbh", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:21:47Z", "type": "Dataset", "title": "Root functional traits determine the magnitude of the rhizosphere priming effect among eight tree species", "description": "Rhizosphere priming effect\u00a0can accelerate or decelerate the  decomposition of soil organic matter.\u00a0Using a natural abundance  13C tracer method allowing partitioning of native soil organic carbon  (SOC) decomposition and plant rhizosphere respiration, we studied the  effects of eight tree species on the strength of the rhizosphere priming.  All tree species enhanced the rate of SOC decomposition, by 82% on  average.\u00a0Mean diameter of first-order roots and root  exudate-derived respiration were positively correlated with the RPE,  together explaining a large part of the observed variation in the RPE (R2  = 0.72), whereas root branching density was negatively associated with the  RPE. Path analyses further suggested that mean diameter of first-order  roots was the main driver of the RPE owing to its positive direct effect  on the RPE and its indirect effects via root exudate-derived respiration  and root branching density. These results demonstrate that the magnitude  of the RPE is regulated by complementary aspects of root morphology,  architecture and physiology, implying that comprehensive approaches are  needed to reveal the multiple mechanisms driving plant effects on the RPE.", "keywords": ["13C natural abundance", "Plant functional traits", "rhizosphere priming effect", "Fine roots", "15. Life on land", "FOS: Natural sciences"], "contacts": [{"organization": "Chao, Lin, Liu, Yanyan, Zhang, Weidong, Wang, Qingkui, Guan, Xin, Yang, Qingpeng, Chen, Longchi, Zhang, Jianbing, Hu, Baoqing, Liu, Zhanfeng, Wang, Silong, Freschet, Gr\u00e9goire T.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.sbcc2frbh"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.sbcc2frbh", "name": "item", "description": "10.5061/dryad.sbcc2frbh", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.sbcc2frbh"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-02-20T00:00:00Z"}}, {"id": "10779/rcsi.24421873.v1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:25:05Z", "type": "Report", "title": "Root litter decomposition is suppressed in species mixtures and in the presence of living roots", "keywords": ["biotic interactions", "Plant biology", "plant species", "mixed-species litter", "living roots", "rhizosphere priming effect", "Plant biochemistry", "home-field advantage", "root litter decomposition", "interactions between species", "litter mixture", "root exudates", "plant diversity"]}, "links": [{"href": "https://doi.org/10779/rcsi.24421873.v1"}, {"rel": "self", "type": "application/geo+json", "title": "10779/rcsi.24421873.v1", "name": "item", "description": "10779/rcsi.24421873.v1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10779/rcsi.24421873.v1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-11-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=rhizosphere+priming+effect&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=rhizosphere+priming+effect&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=rhizosphere+priming+effect&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=rhizosphere+priming+effect&offset=4", "hreflang": "en-US"}], "numberMatched": 4, "numberReturned": 4, "distributedFeatures": [], "timeStamp": "2026-05-30T09:10:04.487504Z"}