SIS7 — Brassica napus

Summary

BnSIS7 (also known as SIS7, STO1, NCED3) on chromosome A03 of oilseed rape encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity and metal binding. The gene is associated with abscisic acid anabolism, carotene breakdown, starch breakdown, lycopene anabolism, beta-carotene anabolism, xanthophyll anabolism, auxin anabolism, proline metabolism, glutathione anabolism, phloem loading, phloem sucrose loading, sucrose transport, abscission, metabolic burst, detoxification, response to AOS, and the TCA cycle. Its product localises to the chloroplast thylakoid membrane and stroma. The gene is linked to leaf temperature, sucrose content, proline content, starch content, photosynthetic rate, ethylene sensitivity, chlorophyll content, seed dormancy, and numerous stress responses including drought, salt, osmotic, cold, high light and temperature stress, as well as branching, stomatal closure, disease susceptibility, callose deposition, hypocotyl growth, and germination traits. Related genes in other species are linked to drought tolerance, ABA accumulation, transpiration rate, lateral root development, and boron toxicity tolerance.