SIS7 — Oryza sativa Indica Group

Summary

BGIOSGA025169 (symbol SIS7) on chromosome 7 of Indica rice encodes a 9-cis-epoxycarotenoid dioxygenase, a carotenoid-cleaving enzyme with carotenoid dioxygenase activity that binds metal ions. The gene is associated with abscisic acid (ABA) biosynthesis and homeostasis, and has been linked to seed dormancy, grain size, and embryo development. It is associated with tolerance of multiple abiotic stresses, including salt, cold, drought, chilling, and aluminium toxicity, as well as with biotic stress responses such as resistance to brown planthopper. Additional associations include stomatal movement, anther development, fruit ripening, and responses to red or far-red light. The encoded protein localises to the thylakoid and chloroplast stroma. Studies of related genes in other species link the family to drought tolerance and ABA accumulation under stress.