GUARD CELL HYDROGEN PEROXIDE-RESISTANT1 functions upstream of reactive carbonyl species production in Arabidopsis guard-cell abscisic acid signaling.

GUARD CELL HYDROGEN PEROXIDE-RESISTANT1 (GHR1), a leucine-rich repeat receptor-like kinase, is involved in abscisic acid (ABA)-induced stomatal closure. We investigated the role of GHR1 in reactive oxygen species (ROS) signaling for ABA-induced stomatal closure. ABA induced ROS production in wild type (WT) and the ghr1 of Arabidopsis thaliana.