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Interaction between ABA signaling and copper homeostasis in Arabidopsis thaliana

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Interaction between ABA signaling and copper homeostasis in Arabidopsis thaliana

dc.contributor.author	Carrió Seguí, Ángela
dc.contributor.author	Romero, Paco
dc.contributor.author	Sanz Grau, Amparo
dc.contributor.author	Peñarrubia Blasco, Lola
dc.date.accessioned	2018-12-21T14:24:04Z
dc.date.available	2018-12-21T14:24:04Z
dc.date.issued	2016
dc.identifier.uri	http://hdl.handle.net/10550/68334
dc.description.abstract	ABA is involved in plant responses to non-optimal environmental conditions, including nutrient availability. Since copper (Cu) is a very important micronutrient, unraveling how ABA affects Cu uptake and distribution is relevant to ensure adequate Cu nutrition in plants subjected to stress conditions. Inversely, knowledge about how the plant nutritional status can interfere with ABA biosynthesis and signaling mechanisms is necessary to optimize stress tolerance in horticultural crops. Here the reciprocal influence between ABA and Cu content was addressed by using knockout mutants and overexpressing transgenic plants of high affinity plasma membrane Cu transporters (pmCOPT) with altered Cu uptake. Exogenous ABA inhibited pmCOPT expression and drastically modified COPT2-driven localization in roots. ABA regulated SPL7, the main transcription factor responsive for Cu deficiency responses, and subsequently affected expression of its targets. ABA biosynthesis (aba2) and signaling (hab1-1 abi1-2) mutants differentially responded to ABA according to Cu levels. Alteration of Cu homeostasis in the pmCOPT mutants affected ABA biosynthesis, transport and signaling as genes such as NCED3, WRKY40, HY5 and ABI5 were differentially modulated by Cu status, and also in the pmCOPT and ABA mutants. Altered Cu uptake resulted in modified plant sensitivity to salt-mediated increases in endogenous ABA. The overall results provide evidence for reciprocal cross-talk between Cu status and ABA metabolism and signaling.
dc.language.iso	eng
dc.relation.ispartof	Plant and Cell Physiology, 2016, vol. 57, num. 7, p. 1568-1582
dc.source	Carrió Seguí, Ángela Romero, Paco Sanz Grau, Amparo Peñarrubia Blasco, Lola 2016 Interaction between ABA signaling and copper homeostasis in Arabidopsis thaliana Plant and Cell Physiology 57 7 1568 1582
dc.subject	Plantes Cèl·lules i teixits
dc.subject	Biologia
dc.title	Interaction between ABA signaling and copper homeostasis in Arabidopsis thaliana
dc.type	journal article	es_ES
dc.date.updated	2018-12-21T14:24:04Z
dc.identifier.doi	https://doi.org/10.1093/pcp/pcw087
dc.identifier.idgrec	114081
dc.rights.accessRights	open access	es_ES