SIS7 — Brassica napus

Summary

BnSIS7 (also known as SIS7, STO1, and NCED3) on chromosome C01 of oilseed rape encodes a carotenoid oxygenase with 9-cis-epoxycarotenoid dioxygenase activity and carotenoid dioxygenase activity. The gene is associated with abscisic acid biosynthesis, accumulation, and production, as well as responses to drought, salt, osmotic, cold, and high light stress. It is linked to seed dormancy, germination under osmotic stress, sugar sensitivity, and ABA-, sucrose-, and paclobutrazol-insensitive germination. Associations also include leaf temperature, photosynthetic rate, chlorophyll content, sucrose content, proline content, starch content, ethylene sensitivity, stomatal closure, branching, axillary bud outgrowth, disease susceptibility, and resistance to Botrytis cinerea. The encoded protein localises to the chloroplast thylakoid membrane and stroma and is associated with phloem loading, sucrose transport, and abscission.