Molecular and physiological changes in response to salt stress in Citrus macrophylla W plants overexpressing Arabidopsis CBF3/DREB1A

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dc.contributor.authorAlvarez-Gerding, Ximena
dc.contributor.authorEspinoza, Carmen
dc.contributor.authorInostroza Blancheteau, Claudio
dc.contributor.authorArce-Johnson, Patricio
dc.date2015
dc.date.accessioned2021-04-30T16:35:22Z
dc.date.available2021-04-30T16:35:22Z
dc.description.abstractPlant stress induced by high salinity has leading to an important reduction in crop, yields. Due to their tropical origin, citrus fruits are highly sensitive to salts. Rootstocks are the root system of fruit trees, regulating ion uptake and transport to the canopy. Therefore,, increasing their salt tolerance could improve the salt tolerance of the fruit tree. For this, we genetically-transformed an important rootstock for lemon, Citrus macrophylla W, to constitutively express the CBF3/DREB1A gene from Arabidopsis, a well-studied salinity tolerance transcription factor. Transgenic lines showed normal size, with no dwarfism. Under salt stress, some transgenic lines showed greater growth, similar accumulation of chloride and sodium in the leaves and better stomatal conductance, in comparison to wild-type plants. Quantitative real-time analyses showed a similar expression of several CBF3/DREB1A target genes, such as COR15A, LEA 4/5, INV, SIP1, P5CS, GOLS, ADC2 and LKR/SDH, in transgenic lines and wild type plants, with the exception of INV that shows increased expression in line 4C15. Under salt stress, all measured transcript increased in both wild type and transgenics lines, with the exception of INV. Altogether, these results suggest a higher salt tolerance of transgenic C macrophylla plants induced by the overexpression of AtCBF3/DREB1A. (C) 2015 Published by Elsevier Masson SAS.
dc.identifier.citationPLANT PHYSIOLOGY AND BIOCHEMISTRY,Vol.92,71-80,2015
dc.identifier.doi10.1016/j.plaphy.2015.04.005
dc.identifier.urihttp://repositoriodigital.uct.cl/handle/10925/3156
dc.language.isoen
dc.publisherELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
dc.sourcePLANT PHYSIOLOGY AND BIOCHEMISTRY
dc.subject.englishSalt tolerance
dc.subject.englishAbiotic stress
dc.subject.englishGenetic transformation
dc.subject.englishCBF3 transcription factor
dc.titleMolecular and physiological changes in response to salt stress in Citrus macrophylla W plants overexpressing Arabidopsis CBF3/DREB1A
dc.typeArticle
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