CS1 — Sorghum bicolor

Summary

SbCS1 (SORBI_3007G177000) on sorghum chromosome 7 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, H2O2-mediated signalling, and reactive oxygen species homeostasis. It has been linked to water-use efficiency, photosynthetic rate, stomatal resistance, leaf senescence, flowering time, seed viability, and bacterial blight disease resistance. Localisation evidence connects the product to the chloroplast thylakoid, peroxisome membrane, and stress granules. Associations also include heat stress memory, thermotolerance, photoprotection, and responses to high light, cold, and aluminium toxicity. Studies of related genes in other species link the family to drought stress, bacterial blight, chloroplast retrograde signalling, and cold stress memory.