ABA is required for the accumulation of APX1 and MBF1c during a combination of water deficit and heat stress.

ABSTRACT: Abscisic acid (ABA) plays a key role in plant acclimation to abiotic stress. Although recent studies suggested that ABA could also be important for plant acclimation to a combination of abiotic stresses, its role in this response is currently unknown. Here we studied the response of mutants impaired in ABA signalling (abi1-1) and biosynthesis (aba1-1) to a combination of water deficit and heat stress. Both mutants displayed reduced growth, biomass, and survival when subjected to stress combination. Focusing on abi1-1, we found that although its stomata had an impaired response to water deficit, remaining significantly more open than wild type, its stomatal aperture was surprisingly reduced when subjected to the stress combination. Stomatal closure during stress combination in abi1-1 was ac

SUBMITTER: Zandalinas SI 

PROVIDER: S-EPMC5049388 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature