PYL1 — Oryza sativa Indica Group

Summary

BGIOSGA004727 (PYL1, also known as ABAR8) on chromosome 1 of Indica rice encodes a protein with abscisic acid binding, protein phosphatase inhibitor activity, and kinase regulator activity, belonging to the START-like domain superfamily and polyketide cyclase/dehydrase family. The gene is associated with regulation of abscisic acid mediated signaling, stomatal movement, seed dormancy release, and germination upregulation. It has been linked to root length, seedling growth, and plant development in this species. Associations include drought tolerance, grain yield, spikelet fertility, vegetative vigor, transpiration rate, and heat stress response. The gene is also connected to nitrate sensitivity, auxin sensitivity, brassinosteroid sensitivity, anthocyanin content, and heterosis. Studies of related genes in other species link the family to transpiration, biomass, heat tolerance, and ABA-regulated gene expression.