NCED expression is related to increased ABA biosynthesis and stomatal closure under aluminum stress

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dc.contributor.authorGavassi, Marina Alves
dc.contributor.authorSilva, Giselle Schwab
dc.contributor.authorda Silva, Carolina de Marchi Santiago
dc.contributor.authorThompson, Andrew J.
dc.contributor.authorMacleod, Kyle
dc.contributor.authorOliveira, Paulo Marcelo Rayner
dc.contributor.authorCavalheiro, Mariana Feitosa
dc.contributor.authorDomingues, Douglas Silva
dc.contributor.authorHabermann, Gustavo
dc.date.accessioned2021-02-10T17:00:23Z
dc.date.available2021-02-10T17:00:23Z
dc.date.issued2021-01-30
dc.description.abstractAluminum (Al)-induced decrease in leaf hydration has been associated with low gas exchange, especially stomatal conductance (gs). However, the mechanisms explaining these responses are unclear. Citrus limonia was exposed to 0 and 1480 μM Al in nutrient solution for 90 days to test whether the low gs and leaf hydration in plants exposed to Al is associated with increased 9-cis-epoxycarotenoid dioxygenase (NCED) gene expression and abscisic acid (ABA) biosynthesis. Relative leaf water content (RWC), water potential (Ψw) and gas exchange in the leaves, as well as leaf and root ClNCED3, ClNCED1 and ClNCED5 expression and accumulation of ABA and its metabolites (phaseic acid, dihydrophaseic acid, (+)-7′-hydroxy-ABA and ABA-β-d-glucosyl ester) were measured. Aluminum up-regulated ClNCED3 and induced ABA accumulation in the roots before impairments in leaf water status (low Ψw, RWC and gs) could be observed. Leaf ABA concentration increased from 7 to 90 days and this could be partially explained by the up-regulation of ClNCED3, ClNCED1 and ClNCED5 in this organ. Stomatal closure occurred concomitantly with the increase of ABA concentration, and this result provides further evidence of the role of ABA modulation of plant hydration under Al stress.en_UK
dc.identifier.citationGavassi MA, Silva GS, da Silva CD, et al., (2021) NCED expression is related to increased ABA biosynthesis and stomatal closure under aluminum stress. Environmental and Experimental Botany, Volume 185, May 2021, Article number 104404en_UK
dc.identifier.issn0098-8472
dc.identifier.urihttps://doi.org/10.1016/j.envexpbot.2021.104404
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/16334
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectABAen_UK
dc.subjectAluminumen_UK
dc.subjectCitrusen_UK
dc.subjectPlant signallingen_UK
dc.subjectWater relationsen_UK
dc.subjectNCED genesen_UK
dc.titleNCED expression is related to increased ABA biosynthesis and stomatal closure under aluminum stressen_UK
dc.typeArticleen_UK

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