Physiological, hormonal and metabolic responses of two alfalfa cultivars with contrasting responses to drought

Soba Hidalgo, David; Zhou, Bangwei; Arrese-Igor Sánchez, César; Munné Bosch, Sergi; Aranjuelo Michelena, Iker

Physiological, hormonal and metabolic responses of two alfalfa cultivars with contrasting responses to drought

dc.contributor.author	Soba Hidalgo, David
dc.contributor.author	Zhou, Bangwei
dc.contributor.author	Arrese-Igor Sánchez, César
dc.contributor.author	Munné Bosch, Sergi
dc.contributor.author	Aranjuelo Michelena, Iker
dc.contributor.department	Zientziak	eu
dc.contributor.department	Institute for Multidisciplinary Research in Applied Biology - IMAB	en
dc.contributor.department	Ciencias	es_ES
dc.contributor.funder	Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa	es
dc.date.accessioned	2020-05-19T06:57:53Z
dc.date.available	2020-05-19T06:57:53Z
dc.date.issued	2019
dc.description.abstract	Alfalfa (Medicago sativa L.) is frequently constrained by environmental conditions such as drought. Within this context, it is crucial to identify the physiological and metabolic traits conferring a better performance under stressful conditions. In the current study, two alfalfa cultivars (San Isidro and Zhong Mu) with different physiological strategies were selected and subjected to water limitation conditions. Together with the physiological analyses, we proceeded to characterize the isotopic, hormone, and metabolic profiles of the different plants. According to physiological and isotopic data, Zhong Mu has a water-saver strategy, reducing water lost by closing its stomata but fixing less carbon by photosynthesis, and therefore limiting its growth under water-stressed conditions. In contrast, San Isidro has enhanced root growth to replace the water lost through transpiration due to its more open stomata, thus maintaining its biomass. Zhong Mu nodules were less able to maintain nodule N2 fixing activity (matching plant nitrogen (N) demand). Our data suggest that this cultivar-specific performance is linked to Asn accumulation and its consequent N-feedback nitrogenase inhibition. Additionally, we observed a hormonal reorchestration in both cultivars under drought. Therefore, our results showed an intra-specific response to drought at physiological and metabolic levels in the two alfalfa cultivars studied.	en
dc.description.sponsorship	This work was supported by the i-COOP-suelos y legumbres (2016SU0016) call funded by the National Research Council. David Soba is the recipient of a PhD grant supported by the Public University of Navarra	en
dc.format.extent	19 p.
dc.format.mimetype	application/pdf	en
dc.identifier.doi	10.3390/ijms20205099
dc.identifier.issn	1661-6596
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/36909
dc.language.iso	eng	en
dc.publisher	MDPI	en
dc.relation.ispartof	International Journal of Molecular Sciences, 2019, 20 (20), 5099	en
dc.relation.publisherversion	https://doi.org/10.3390/ijms20205099
dc.rights	© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY)	en
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	Alfalfa	en
dc.subject	Drought	en
dc.subject	Hormones	en
dc.subject	Metabolites	en
dc.subject	N/C metabolism	en
dc.subject	Nodule	en
dc.subject	Physiology	en
dc.title	Physiological, hormonal and metabolic responses of two alfalfa cultivars with contrasting responses to drought	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
dspace.entity.type	Publication
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