MYB4 — Brassica juncea

Summary

BjMYB4 (BJUB03G46080S) on Indian mustard chromosome B03 encodes a Myb-family transcription factor with sequence-specific DNA binding and protein dimerization activities. It is associated with the regulation of phenylpropanoid, flavonoid, proanthocyanidin, anthocyanin, and lignin metabolism, as well as sinapate ester downregulation, trichome spacing and differentiation, seed coat development, the shikimate pathway, green leaf volatile biosynthesis, UV-B response, circadian rhythm, jasmonic acid signaling, and wounding response. The gene is linked to traits including flavonoid and anthocyanin content, leaf trichome density, brassinosteroid and jasmonic acid content, iron concentration, nitrate uptake, UV-B light sensitivity, disease tolerance, abiotic stress response, seed growth, flowering time, and root meristem development. Studies of related genes in other species connect the family to UV-B tolerance, flavonol biosynthesis, lignin content, trichome density, and pathogen resistance.