Drought stress modifies the source-sink dynamics of nitrogen-fixing soybean plants prioritizing roots and nodules

Rubia Galiano, María Isabel; Larrainzar Rodríguez, Estíbaliz; Arrese-Igor Sánchez, César

Drought stress modifies the source-sink dynamics of nitrogen-fixing soybean plants prioritizing roots and nodules

dc.contributor.author	Rubia Galiano, María Isabel
dc.contributor.author	Larrainzar Rodríguez, Estíbaliz
dc.contributor.author	Arrese-Igor Sánchez, César
dc.contributor.department	Ciencias	es_ES
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Multidisciplinary Research in Applied Biology - IMAB	en
dc.contributor.funder	Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa
dc.date.accessioned	2025-06-25T09:34:08Z
dc.date.available	2025-06-25T09:34:08Z
dc.date.issued	2025-05-26
dc.date.updated	2025-06-25T09:28:17Z
dc.description.abstract	Soybean plants are one of the most cultivated legume crops worldwide. Their ability to establish nitrogen-fixing symbiosis with rhizobium bacteria allows the reduction of molecular nitrogen to ammonium, contributing to a reduction in the dependence on nitrogen fertilizers. However, nitrogen fixation is highly sensitive to environmental stresses, such as water deficit, and the regulatory mechanisms underlying this inhibition remain debatable. In the current study, we analyzed carbon (C) allocation dynamics in drought-stressed soybean plants following the application of [U-C-13]-sucrose to source leaves. Three sets of plants were analyzed: well-watered plants, mild drought, and severe drought-stressed plants. C-13 distribution was monitored for up to 6 h post-application. Under optimal water conditions, C-13 was mainly allocated to young (sink) leaves. During drought stress, transport trends changed, prioritizing C allocation primarily to the roots and nodules to a lesser extent. Metabolite profiling identified drought- and tissue-specific variations in the levels of the major C and N compounds.	en
dc.description.sponsorship	This work was supported by grants PID2021-122740OB-I00 funded by MCIN/AEI/10.13039/501100011033, ERDF: A way of making Europe and TED2021-130111B-I00, Next Generation funding. Open access funding was provided by the Public University of Navarra.
dc.format.mimetype	application/pdf
dc.identifier.citation	Rubia, M. I., Larrainzar, E., Arrese-Igor, C. (2025). Drought stress modifies the source-sink dynamics of nitrogen-fixing soybean plants prioritizing roots and nodules. Physiologia Plantarum, 177(3), 1-11. https://doi.org/10.1111/ppl.70276.
dc.identifier.doi	10.1111/ppl.70276
dc.identifier.issn	0031-9317
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/54313
dc.language.iso	eng
dc.publisher	Wiley
dc.relation.ispartof	Physiologia Plantarum (2025), vol. 177, núm. 3, e70276
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/PID2021-122740OB-I00/ES/
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023/TED2021-130111B-I00/
dc.relation.publisherversion	https://doi.org/10.1111/ppl.70276
dc.rights	© 2025 The Author(s). Physiologia Plantarum published by John Wiley & Sons Ltd on behalf of Scandinavian Plant Physiology Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in anymedium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	C-13 labeling	en
dc.subject	C-13 transport	en
dc.subject	Drought stress	en
dc.subject	Source-sink relationships	en
dc.subject	Symbiotic nitrogen fixation	en
dc.title	Drought stress modifies the source-sink dynamics of nitrogen-fixing soybean plants prioritizing roots and nodules	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
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