PYL1 — Oryza sativa Japonica

Summary

OsPYL1, encoded by rice gene OS05G0473000 on chromosome 5, is a protein with abscisic acid binding, protein phosphatase inhibitor activity, protein kinase activator activity, and signaling receptor activity, belonging to the START-like domain superfamily and polyketide cyclase/dehydrase family. It is associated with the downregulation of seed dormancy, upregulation of seed germination and growth, ABA and auxin metabolism, protein dephosphorylation, and carbohydrate breakdown. The gene has been linked to root length, seedling growth, and ABA signalling in rice. It is also associated with numerous traits including seed yield, grain yield, seed longevity and viability, vegetative vigor, leaf length, shoot branching, root architecture, stomatal closure, transpiration rate, and responses to drought, high temperature, osmotic stress, nitrate, and wheat powdery mildew. Related genes in other species link it to ABA sensitivity, stomatal response, heat tolerance, and pathogen susceptibility.