RHS9 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0706090, also known as PPD-H1 or RHS9 on barley chromosome 7H, encodes a protein with an alpha/beta hydrolase fold and MES/HNL domain that exhibits pheophorbidase, MESA esterase, MEJA esterase, and MeIAA esterase activities, along with hormone activity and protein homodimerization. This gene is associated with photoperiod response in barley, and is linked to chlorophyll a breakdown, salicylic acid and jasmonic acid metabolism, leaf senescence, vernalization response, and responses to cold and UV-B. It localizes to the apoplast, extracellular space, plasma membrane, cytoplasm, and nucleus. PPD-H1 has been connected to agronomically important traits including grain yield, grain number, floret number per spikelet, spikelet fertility, spike length, plant height, and days to heading. Studies of related genes in other species link the family to reactive oxygen species and broad-spectrum disease resistance.