A11 — Brassica napus

Summary

BnA11 (A11, DARMORV10_C06P22640.1) on chromosome C06 of oilseed rape (Brassica napus) encodes a chalcone isomerase (CFI) with chalcone isomerase, naringenin-chalcone synthase, flavanone 4-reductase, dihydroflavanol 4-reductase, and flavanone 3-dioxygenase activities. The gene is associated with flavonoid, anthocyanin, proanthocyanidin, and phenylpropanoid biosynthesis, as well as pigment metabolism, seed development, embryogenesis, and responses to UV-B, karrikin, and gravity. It has been linked to seed color, anthocyanin content, photosynthetic ability, UV-B light sensitivity, herbicide sensitivity, insect damage response, flower development, abiotic stress tolerance (including drought, salt, and low temperature), root morphology, and stomatal closure. Localization evidence places the product in the cytosol, nucleus, endoplasmic reticulum, and tonoplast. Studies of related genes in other species connect the family to oxidative stress tolerance, proanthocyanidin biosynthesis, and UV-B sensitivity.