CKX1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.6HG0579880 (HvCKX1) on barley chromosome 6H encodes a cytokinin dehydrogenase (EC 1.5.99.12), an FAD-binding oxidoreductase. The gene is associated with cytokinin content, signalling and homeostasis, as well as with meristem, inflorescence and seed development. Observed in barley, HvCKX1 is linked to root surface area and root hair number. It has also been connected to tiller number, plant height, root length, leaf morphology, photosynthetic rate, flowering time, chloroplast development, and disease tolerance. Additional associations include grain number per panicle, seed size, seed yield, biomass production, leaf area, heat and drought tolerance, osmotic stress tolerance, and root system architecture. Studies of related genes in other species link the family to grain yield, grain number, root growth, salinity tolerance, and photosynthesis.