CKX1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.1HG0059670 (HvCKX1) on barley chromosome 1H encodes a cytokinin dehydrogenase (EC 1.5.99.12) with FAD binding and oxidoreductase activity, placing it in the cytokinin dehydrogenase family. The gene is associated with cytokinin breakdown, signaling, and metabolism, as well as meristem, inflorescence, and seed development. Observed phenotypes include effects on root surface area and root hair number. The gene has been linked to traits such as cytokinin content, tiller number, plant height, root length, photosynthetic rate, flowering time, and disease tolerance. Additional associations include chloroplast development, leaf morphology, and heat and drought tolerance. Studies of related genes in other species connect the family to grain number, yield, root growth, and salinity tolerance.