SIS7 — Brassica napus

Summary

BnSIS7 (also known as NCED3, STO1) on chromosome A01 of oilseed rape (Brassica napus) encodes a carotenoid oxygenase with 9-cis-epoxycarotenoid dioxygenase and carotenoid dioxygenase activities. The gene is associated with abscisic acid biosynthesis and accumulation, as well as responses to drought, salt, osmotic, cold, and high light stress. It has been linked to stomatal closure, seed dormancy, germination under osmotic stress, and sugar sensitivity. Associations also include leaf temperature, photosynthetic rate, chlorophyll content, and sucrose, proline, and starch content. The product localises to the chloroplast thylakoid membrane and stroma. Studies of related genes in other species link the family to drought tolerance, ABA accumulation, transpiration rate, and lateral root development.