SIS7 — Oryza sativa Indica Group

Summary

BGIOSGA013214 (symbol SIS7, also known as OiNCED3 and OiNCED5) on chromosome 3 of Indica rice encodes a carotenoid dioxygenase with 9-cis-epoxycarotenoid dioxygenase activity and metal binding. The gene is associated with abscisic acid (ABA) biosynthesis and homeostasis, and has been linked to seed dormancy, grain size, and stress tolerance including salt, cold, drought, chilling, and aluminium toxicity. It is associated with biotic stress responses such as resistance to brown planthopper, as well as with senescence, plant development, and signal transduction. The product localises to the thylakoid and chloroplast compartments. Additional associations include grain length, chlorophyll content, photosynthetic rate, ethylene sensitivity, and chilling stress response. Related genes in other species are linked to drought tolerance and ABA accumulation under stress.