RBOHB — Oryza sativa Japonica

Summary

Os12g0541300, designated RBOHB (also known as RBOHH), encodes a respiratory burst oxidase homolog protein in rice (Oryza sativa Japonica) on chromosome 12. The product contains NADPH oxidase, FAD-binding, and EF-hand calcium-binding domains and exhibits NAD(P)H oxidase H2O2-forming activity, peroxidase activity, and calcium ion binding. This gene is associated with immune response, response to chitin, programmed cell death, ferroptosis, appressorium formation, aerenchyma formation, actin polymerization, metabolic burst, and ABA signaling, and localizes to the plasmalemma. It is linked to grain weight, grain yield, seed weight, starch content, germination rate, ethylene sensitivity, thermotolerance, disease resistance, nematode resistance, and hydrogen peroxide production. Studies of related genes in other species link the family to seed after-ripening and germination, and to rice blast disease response.