CKX1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.7HG0747720, designated HvCKX1 on barley chromosome 7H, encodes a cytokinin dehydrogenase (EC 1.5.99.12) with FAD binding and redox activity, placing it in the cytokinin dehydrogenase family. The gene is associated with cytokinin metabolism, tRNA processing, immune and defense responses, amino acid anabolism, seed development, and homeostasis. Its product localises to the endoplasmic reticulum, extracellular space, cytosol, and nucleus. HvCKX1 is associated with cytokinin content, tiller number, root length, plant height, and grain yield. Studies of related genes in other species further link this family to cytokinin regulation and plant development.