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Data from: Carbon allocation to root exudates is maintained in mature temperate tree species under drought

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dc.contributor.authorHafner, Benjamin D
dc.contributor.authorBrunn, Melanie
dc.contributor.authorZwetsloot, Marie J
dc.contributor.authorWeikl, Fabian
dc.contributor.authorPritsch, Karin
dc.contributor.authorHikino, Kyohsuke
dc.contributor.authorRuehr, Nadine K
dc.contributor.authorSayer, Emma J
dc.contributor.authorBauerle, Taryn L
dc.date.accessioned2022-04-08T13:12:40Z
dc.date.available2022-04-08T13:12:40Z
dc.date.issued2022-04-08
dc.descriptionPlease cite as: Benjamin D Hafner, Melanie Brunn, Marie J Zwetsloot, Fabian Weikl, Karin Pritsch, Kyohsuke Hikino, Nadine K Ruehr, Emma J Sayer, Taryn L Bauerle. (2022) Data from: Carbon allocation to root exudates is maintained in mature temperate tree species under drought. [dataset] Cornell University eCommons Repository. https://doi.org/10.7298/6r80-8a15en_US
dc.description.abstractData in support of the following research: Carbon (C) exuded via roots is proposed to increase under drought and facilitate important ecosystem functions. However, it is unknown how exudate quantities relate to the total C budget of a drought-stressed tree, i.e. how much of net-C assimilation is allocated to exudation at the tree level. We calculated the proportion of daily C assimilation allocated to root exudation during early summer by collecting root exudates from mature Fagus sylvatica L. and Picea abies (L.) Karst. exposed to experimental drought, and combining above- and belowground C fluxes with leaf, stem, and fine-root surface area. Exudation from individual roots increased exponentially with decreasing soil moisture, with the highest increase at the wilting point. Despite ~50 % reduced C assimilation under drought, exudation from fine-root systems was maintained and trees exuded 1.0 % (F. sylvatica) to 2.5 % (P. abies) of net C into the rhizosphere, increasing the proportion of C allocation to exudates two- to threefold. Water-limited P. abies released two-thirds of its exudate-C into the surface soil, whereas it was only one-third in droughted F. sylvatica. Across the entire root system, droughted trees maintained exudation similar to controls, suggesting drought-imposed belowground C investment, which could be beneficial for ecosystem resilience.en_US
dc.description.sponsorshipGerman Research Foundation (DFG), grant numbers: PR555/2-1, PR292/22-1, GR 1881/5-1, MA1763/7-1, MA1763/10-1 Bavarian State Ministry for Nutrition, Agriculture and Forestry and Bavarian State Ministry for Environment and Consumer Protection, grant number: W047/Kroof II.en_US
dc.identifier.doihttps://doi.org/10.7298/6r80-8a15
dc.identifier.urihttps://hdl.handle.net/1813/111206
dc.language.isoen_USen_US
dc.provenanceCHANGELOG Fixed 20230310 BrunnHafner_NewPhytologist2022_readme.txt >> METHODOLOGICAL INFORMATION >>2. Methods for processing the data: >> Exudates: Raw values in mg L-1 were multiplied by sample volume (40 mL) and normalised as per 24 hr (samples comprised of 48hrs of exudate collection). Blind control samples were then subtracted. The displayed exudation data are presented in ug C day-1. Replaces Exudates: Raw values in mg L-1 were multiplied by sample volume (40 mL) and normalised as per hr (samples comprised of 48hrs of exudate collection). Blind control samples were then subtracted. The displayed exudation data are presented in ug C hour-1. DATA-SPECIFIC INFORMATION FOR: BrunnHafner_Ex_Roots_Properties.csv >> Variable List >> Npoc - non-purgeable organic carbon, ug d-1 replaces Npoc - non-purgeable organic carbon, ug hr-1English
dc.relation.isreferencedbyMelanie Brunn, Benjamin D Hafner, Marie J Zwetsloot, Fabian Weikl, Karin Pritsch, Kyohsuke Hikino, Nadine K Ruehr, Emma J Sayer, Taryn L Bauerle. (2022) Carbon allocation to root exudates is maintained in mature temperate tree species under drought. New Phytologist, nph.18157. https://doi.org/10.1111/nph.18157
dc.relation.isreferencedbyurihttps://doi.org/10.1111/nph.18157
dc.rightsCC0 1.0 Universal*
dc.rights.urihttp://creativecommons.org/publicdomain/zero/1.0/*
dc.subjectBelowground carbon allocationen_US
dc.subjectcarbon partitioningen_US
dc.subjectexperimental droughten_US
dc.subjectfine-root exudationen_US
dc.subjectEuropean beechen_US
dc.subjectNorway spruceen_US
dc.subjectrhizosphereen_US
dc.subjecttemperate-forest C budgeten_US
dc.titleData from: Carbon allocation to root exudates is maintained in mature temperate tree species under droughten_US
dc.typedataseten_US
schema.accessibilityHazardnoneen_US

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