CS1 — Sorghum bicolor

Summary

SbCS1 (SORBI_3008G057900) on sorghum 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 cellular oxidant detoxification, hydrogen peroxide-mediated signalling, 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. Associations also extend to chloroplast development, adventitious root development, and responses to low temperature, aphids, and viral disease. The encoded protein localises to the peroxisome membrane, chloroplast thylakoid and envelope, and stress granules. Studies of related genes in other species connect the family to drought stress tolerance, high light stress tolerance, thermomemory, and chloroplast retrograde signalling.