SIS7 — Oryza sativa Japonica

Summary

OsSIS7 (also known as OsNCED3, OsNCED5, OsNCED6, and OsSTO1) on rice chromosome 7 encodes a 9-cis-epoxycarotenoid dioxygenase (NCED4 family) with carotenoid dioxygenase activity, a key enzyme in abscisic acid (ABA) biosynthesis. The gene is associated with a wide range of stress responses and developmental processes in rice. It has been linked to salt, cold, drought, chilling, and aluminium toxicity tolerance, as well as biotic stress resistance, including defense against brown planthopper. Associations with grain size, seed dormancy, embryo development, senescence, and plant growth have also been observed. The encoded protein localizes to the thylakoid and chloroplast stroma. Additionally, OsSIS7 is associated with traits such as grain length, spikelet fertility, photosynthetic rate, grain yield, and specific leaf weight, and with processes including ABA anabolism, seed maturation, and response to red or far-red light.