CKX1 — Oryza sativa Indica Group

Summary

BGIOSGA016782 (CKX1/CKX8) on chromosome 4 of Indica rice encodes a cytokinin dehydrogenase with FAD binding and redox activity, belonging to the cytokinin dehydrogenase FAD/cytokinin-binding domain family. The gene is associated with cytokinin breakdown and metabolism, meristem development, and phosphoglycerate transmembrane transport. It localizes to plastid inner membrane, chloroplast envelope, ER lumen, vacuole, and cytosol. In rice, CKX family members have been linked to grain yield, grain number, thousand grain weight, panicle and spikelet traits, root and shoot development, leaf senescence, photosynthesis, salt and drought tolerance, and abscisic acid responses. Additional associations include seed shattering, panicle number, grain shape and size, plant height, flowering time, disease tolerance, and heterosis. Related genes in other species have been linked to root growth, flowering, salinity tolerance, and cytokinin level regulation.