CS1 — Oryza sativa Japonica

Summary

OsCS1 (OS08G0549100) on rice chromosome 8 encodes a haem peroxidase of the Ccp1-like family with L-ascorbate peroxidase activity (EC 1.11.1.11). The gene is associated with chloroplast function, plant growth, shoot architecture, leaf morphology, height, seed traits including thousand kernel weight, and responses to salt, cold, and abiotic stress. It is linked to blast resistance, gall midge resistance, immunity, and phytohormone signalling including salicylic acid. Associations also include amylopectin and carotenoid content, tiller angle, bacterial blight disease resistance, aluminum tolerance, leaf relative water content, and vegetative-to-reproductive phase transition. The product localises to the peroxisome membrane, chloroplast outer membrane, thylakoid, and stress granules, and is linked to the ascorbate-glutathione cycle, hydrogen peroxide-mediated signalling, and chloroplast-nucleus signalling.