CKX1 — Oryza sativa Indica Group

Summary

BGIOSGA002233 (CKX1) on chromosome 1 of Indica rice encodes a cytokinin dehydrogenase enzyme (EC 1.5.99.12) with FAD binding and oxidoreductase activity, belonging to the cytokinin dehydrogenase FAD/cytokinin-binding domain family. The gene is associated with cytokinin breakdown and signaling, meristem and inflorescence development, and phosphoglycerate transport. In rice, CKX1 is linked to grain yield, grain number, thousand grain weight, panicle and spikelet traits, root and shoot development, leaf senescence, photosynthesis, and responses to salt, drought, and abscisic acid. Additional associations include seed shattering, panicle number, grain shape and size, plant height, flowering time, heterosis, disease tolerance, and chloroplast development. Related genes in other species are linked to root growth, salinity tolerance, fruit ripening, and disease resistance.