SIS7 — Brassica napus

Summary

BnSIS7 (also known as SIS7, STO1, NCED3, and BnNCED3) on chromosome C05 of oilseed rape encodes a carotenoid oxygenase with 9-cis-epoxycarotenoid dioxygenase and carotenoid dioxygenase activities. The gene is associated with abscisic acid biosynthesis and accumulation, proline metabolism, carotenoid breakdown, and xanthophyll and beta-carotene anabolism. It is linked to phloem sucrose loading, sucrose transport, starch breakdown, and the TCA cycle. Associations with traits include leaf temperature, sucrose, proline, and starch content, photosynthetic rate, chlorophyll content, seed dormancy, and ethylene sensitivity. The gene is also linked to drought, salt, osmotic, cold, and high light stress responses, stomatal closure, branching, abscission, disease susceptibility, and resistance to Botrytis cinerea. The protein localises to the chloroplast thylakoid membrane and stroma.