CKX1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0579910 (HvCKX1) on barley chromosome 6H encodes a cytokinin dehydrogenase (EC 1.5.99.12), a FAD-binding oxidoreductase. The gene is associated with cytokinin content, signalling, homeostasis, and breakdown, as well as root surface area, root hair number, root development, root length, adventitious root initiation, and primary root growth. It has been linked to tiller number, plant height, leaf morphology, leaf area, photosynthetic rate, chloroplast development, inflorescence and seed development, grain number per panicle, seed size, seed yield, flowering time, meristem and shoot apical meristem size, stomatal complex morphogenesis, and disease tolerance. The product localises to plastids, chloroplast envelope, ER, vacuole, cytosol, and nucleus. Studies of related genes in other species connect the family to grain yield, salinity tolerance, and photosynthesis.