BRI1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0473960, the barley BRI1 gene on chromosome 5H, encodes a leucine-rich repeat receptor-like serine/threonine kinase with steroid binding, signaling receptor, and protein kinase activities. In barley, BRI1 is associated with brassinosteroid detection and signaling, hormone-mediated signaling, regulation of cell growth, seedling development, skotomorphogenesis, heat acclimation, and defense responses to fungi and other organisms. It is linked to megasporogenesis, microsporogenesis, anther wall tapetum development, and microtubule bundling. The gene is associated with grain size and weight traits, including leaf angle and GRWT. BRI1 localizes to the plasma membrane, endosome, and plant-type vacuole. Studies of related genes in other species link the family to receptor kinase activity.