PYL1 — Oryza sativa Indica Group

Summary

BGIOSGA033490 (PYL1, also known as ABAR9) on chromosome 10 of Indica rice encodes a protein with abscisic acid binding, protein phosphatase inhibitor, and protein kinase activator activities, and belongs to the polyketide cyclase/dehydrase and START-like domain superfamilies. It is associated with regulation of ABA-mediated signaling, stomatal movement, seed dormancy release, and germination. The gene has been linked to root length, seedling growth, and plant development in rice. Associations also include drought tolerance, grain yield, osmotic stress sensitivity, vegetative vigor, spikelet fertility, shoot branching, transpiration rate, and responses to high temperature, salinity, and flooding. The protein localizes to the cytosol, tonoplast, plastid, mitochondria, Golgi, and plasma membrane. Studies of related genes in other species connect the family to ABA sensitivity, heat tolerance, and pathogen resistance.