CS1 — Oryza sativa Indica Group

Summary

BGIOSGA036533 (CS1, also known as OiCS1) in indica rice encodes a haem peroxidase with L-ascorbate peroxidase activity (EC 1.11.1.11), placing it in the ascorbate peroxidase family. The gene is associated with diverse biological processes including cellular oxidant detoxification, H2O2-mediated signaling, ROS metabolism, chloroplast-nucleus signaling, and auxin metabolism. It is linked to agronomically important traits such as bacterial blight disease resistance, drought stress, photosynthesis, plant growth and architecture, seed viability, flowering time, leaf senescence, and root development. The encoded protein localizes to multiple cellular compartments including the chloroplast thylakoid membrane, peroxisome membrane, and vacuole. Studies of related ascorbate peroxidase genes in other species connect the family to oxidative stress tolerance, heat and cold stress responses, and pathogen resistance.