CS1 — Sorghum bicolor

Summary

SbCS1 (SORBI_3006G021100) on sorghum chromosome 6 encodes a haem peroxidase of the Ccp1-like family with L-ascorbate peroxidase activity (EC 1.11.1.11). The gene is associated with cellular oxidant detoxification, hydrogen peroxide-mediated signaling, water homeostasis, and auxin metabolism. It has been linked to numerous agronomic traits including water-use efficiency, photosynthetic rate, stomatal resistance, flowering time, seed viability, leaf senescence, and bacterial blight disease resistance. Localisation evidence connects the product to the chloroplast thylakoid, peroxisome membrane, and stress granules. Studies of related genes in other species link the family to drought stress tolerance, high light stress tolerance, cold memory, and bacterial blight resistance, though these associations are not yet established for SbCS1 itself.