PAP1 — Brassica oleracea var. botrytis

Summary

BoPAP1 (also known as BoMYB113, BoPAP2, BoMYB90, and BoMYB75) on cauliflower chromosome 6 encodes a Myb-domain transcription factor that binds DNA and regulates transcription. In cauliflower, it is associated with the regulation of flavonoid, proanthocyanidin, and anthocyanin biosynthesis, pigmentation, seed growth, mucilage anabolism and extrusion from the seed coat, trichome spacing, epidermal cell fate specification, and sucrose-mediated signaling. The gene is linked to numerous traits including flavonoid content, seed coat color, leaf trichome density, root system morphology, light quality responses, seed longevity, cadmium and iron concentration, phosphorus uptake, lignin biosynthesis, and viral disease response. It localizes to the nucleus and nuclear ubiquitin ligase complexes. Studies of related genes in other species link the family to anthocyanin pigmentation, flavonol accumulation, trichome and root hair differentiation, salt stress tolerance, and phosphate deficiency tolerance.