CS1 — Oryza sativa Japonica

Summary

OsCS1 (OS04G0434800) on rice chromosome 4 encodes a haem peroxidase of the Ccp1-like family with L-ascorbate peroxidase activity (EC 1.11.1.11). The gene is associated with diverse biological processes including the ascorbate-glutathione cycle, cellular oxidant detoxification, chloroplast-nucleus signaling, and aerenchyma formation. It has been linked to multiple stress responses observed in rice, particularly drought, cold, salt, and oxidative stress, as well as to photosynthesis, plant growth, and architecture traits including height, leaf morphology, and tiller angle. Associations also extend to blast resistance, gall midge resistance, bacterial blight disease resistance, and traits such as seed viability, amylopectin content, carotenoid content, and days to flowering. The encoded protein localizes to chloroplast thylakoid membranes, peroxisome membranes, and stress granules.