PAP1 — Brassica oleracea var. botrytis

Summary

BoPAP1 (also known as BoMYB113, BoPAP2, BoMYB90, BoMYB75) on cauliflower chromosome 2 encodes a Myb-domain transcription factor with DNA-binding, protein-dimerization, ubiquitin-ligase and protein-kinase activities. It is associated with the regulation of flavonoid, proanthocyanidin, anthocyanin and mucilage biosynthesis, pigmentation, seed growth, trichome spacing, epidermal cell fate specification, sucrose-mediated signaling, circadian rhythm and superoxide removal. The gene is linked to numerous traits including flavonoid content, seed coat color, leaf trichome density, root epidermal cell length, light-quality responses, cadmium and iron concentration, phosphorus uptake, seed longevity, lignin biosynthesis, starch grain synthesis, viral disease response, brassinosteroid content, photoperiod-sensitive flowering time, and root system morphology. Studies of related genes in other species connect the family to anthocyanin pigmentation, trichome and root-hair differentiation, light responsiveness, salt stress tolerance, iron accumulation, and insect resistance.