MYB1 — Capsicum annuum

Summary

CaMYB90 (MYB1, T459_25692) on pepper chromosome 10 encodes a Myb-domain transcription factor with sequence-specific DNA binding and transcription cis-regulatory region binding activities. It is localized to the nucleus and is associated with the positive regulation of anthocyanin anabolism, flavonoid anabolism, lignin anabolism, green leaf volatile biosynthesis, and secondary metabolism. The gene has been connected to fruit development, placentation, pollen development, cell differentiation, and both up- and down-regulation of transcription. Traits linked to CaMYB90 include fruit color, anthocyanin content, photosynthetic rate, heterosis, and plant embryo cotyledon color. Phenotypic associations include purple pigmentation, antioxidant capacity, sugar and citric acid content, fruit storage life, trichome formation, sesquiterpene accumulation, and resistance to Botrytis cinerea. Studies of related genes in other species further connect the family to anthocyanin accumulation, shelf life, and drought tolerance.