PYR/PYL receptors play a major role for regulation of transcriptional response to abscisic acid

ABSTRACT: Abscisic acid (ABA) is a key hormone for plant growth, development and stress adaptation. Perception of ABA through four types of receptors has been reported. We show here that impairment of ABA perception through the PYR/PYL/RCAR branch reduces vegetative growth and seed production, and leads to a severely open stomata and dramatic ABA insensitive phenotype, even though other branches for ABA perception remain functional. Arabidopsis sextuple mutant impaired in 6 PYR/PYL receptors, namely PYR1, PYL1, PYL2, PYL4, PYL5 and PYL8, was able to germinate and grow even on 100 mM ABA. Whole-rosette stomatal conductance (Gst) measurements revealed that leaf transpiration in the sextuple pyr/pyl mutant was higher than in the ABA-deficient aba3-1 or ABA-insensitive snrk2.6 mutants. The gradually inc

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Francisco Vera-Sirera 

PROVIDER: E-GEOD-36692 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress