HD1 — Brachypodium distachyon

Summary

BdHD1 (BRADI_1G37290V3) on Brachypodium distachyon chromosome 1 encodes a histone deacetylase with NAD-independent activity, also annotated with histone demethylase, transcription corepressor, and calcium-dependent protein serine/threonine kinase activities. The gene is associated with regulation of seed maturation, fruit abscission, melatonin metabolism, and responses to biotic stimuli and diterpenes. It is linked to traits including floral organ length, fruit ripening and quality, leaf elongation rate, branch angle, plant size, shoot growth angle, vegetative-to-reproductive phase transition, temperature stress response, lignin biosynthesis, and total soluble sugar content. The product localizes to HDAC and PRC2 complexes, condensed chromosomes, nucleolus, and chloroplast envelope. Studies of related genes in other species link the family to salt tolerance, brassinosteroid signaling, and plant architecture, while related genes in other species are also associated with flower development, abscisic acid response, and systemic acquired resistance.