GL1 — Brassica juncea

Summary

BJUB01G28690S (symbol GL1, preferred name BjMYB23) on Indian mustard chromosome B01 encodes a plant Myb transcription factor with DNA-binding, transcription factor activity, protein dimerization, kinase binding, and lipid binding functions. It is associated with the regulation of trichome spacing, morphogenesis, and cell fate specification, as well as plant epidermis development, defense response to insects, positive regulation of anthocyanin biosynthesis, indole glucosinolate metabolism, and secondary cell wall biogenesis. The gene is linked to numerous traits including leaf trichome density, root hair length, seed protein and oil content, flavonoid and anthocyanin content, iron concentration, oleic acid content, shoot growth angle, branch angle, and responses to phosphorus, jasmonic acid, aphids, insects, osmotic stress, and submergence. It localizes to the nucleus and root hair and is linked to MYC1, GL2, TRY, GL3, and EGL1. Related genes in other species connect the family to root epidermal patterning, trichome differentiation, seed coat mucilage accumulation, and resistance to herbivory and fungal pathogens.