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Deciphering the molecular bases for drought tolerance in A rabidopsis autotetraploids
Author(s) -
POZO JUAN C.,
RAMIREZPARRA ELENA
Publication year - 2014
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.12344
Subject(s) - biology , abscisic acid , arabidopsis thaliana , transcriptome , arabidopsis , drought tolerance , limiting , adaptation (eye) , reactive oxygen species , gene duplication , microbiology and biotechnology , gene , transpiration , botany , gene expression , genetics , photosynthesis , mechanical engineering , neuroscience , mutant , engineering
Whole genome duplication (autopolyploidy) is common in many plant species and often leads to better adaptation to adverse environmental conditions. However, little is known about the physiological and molecular mechanisms underlying these adaptations. Drought is one of the major environmental conditions limiting plant growth and development. Here, we report that, in A rabidopsis thaliana , tetraploidy promotes alterations in cell proliferation and organ size in a tissue‐dependent manner. Furthermore, it potentiates plant tolerance to salt and drought stresses and decreases transpiration rate, likely through controlling stomata density and closure, abscisic acid ( ABA) signalling and reactive oxygen species ( ROS ) homeostasis. Our transcriptomic analyses revealed that tetraploidy mainly regulates the expression of genes involved in redox homeostasis and ABA and stress response. Taken together, our data have shed light on the molecular basis associated with stress tolerance in autopolyploid plants.