CKX1 — Oryza sativa Indica Group

Summary

BGIOSGA002195 (CKX1) on chromosome 1 of Indica rice encodes a cytokinin dehydrogenase (EC 1.5.99.12) with FAD-binding and oxidoreductase domains, and is also annotated with primary methylamine oxidase activity, phosphoglycerate transmembrane transporter activity, and antiporter activity. The gene is associated with cytokinin breakdown and signaling, meristem and inflorescence development, and grain yield, grain number, thousand grain weight, and panicle traits. It has been linked to root and shoot development, leaf senescence, photosynthesis, salt and drought tolerance, and abscisic acid responses. Additional associations include seed shattering, panicle number, grain shape, amylose content, plant height, flowering time, and disease tolerance. The protein is localized to the plastid inner membrane, chloroplast envelope, ER lumen, vacuole, cytosol, and nucleus. Related genes in other species link the gene to root growth, flowering, salinity tolerance, and disease resistance.