RBOHB — Oryza sativa Japonica

Summary

Os01g0360200 (RBOHB) encodes a respiratory burst oxidase homolog, a NADPH oxidase that produces hydrogen peroxide and contains EF-hand calcium-binding domains. The enzyme is localized to the plasma membrane and is associated with immune response, response to chitin, innate immunity, and appressorium formation. RBOHB is linked to ferroptosis, cell death, actin polymerization, and metabolic burst, as well as ABA signaling, protein phosphorylation, and response to heat. In rice, the gene is associated with grain traits including chalky endosperm, seed weight, grain weight, and grain yield, along with hydrogen peroxide content, ethylene sensitivity, and germination rate. Phenotypic associations include drought tolerance, thermotolerance, blast disease resistance, nematode resistance, and stomatal aperture. Related genes in other species are linked to seed after-ripening and germination, and to abiotic stress response.