PYL1 — Oryza sativa Indica Group

Summary

BGIOSGA017879 (symbol PYL1, also known as OiPYL1) on Indica rice chromosome 5 encodes a protein with abscisic acid (ABA) binding, protein phosphatase inhibitor, and kinase regulator activities, belonging to the plant hormone signal transduction and START-like domain superfamilies. The gene is associated with regulation of ABA-mediated signaling, stomatal opening and movement, seed dormancy release, seed germination, and defense responses to bacteria. It has been linked to traits including drought tolerance, grain yield, osmotic stress tolerance, flooding tolerance, salt stress tolerance, heat stress response, leaf senescence, root system architecture, spikelet fertility, seed yield, vegetative vigor, and transpiration rate. The protein localizes to the cytosol, tonoplast, Golgi, plastid, mitochondria, and plasma membrane. Studies of related genes in other species link the family to ABA sensitivity, stomatal response, heat tolerance, and pathogen susceptibility.