CS1 — Sorghum bicolor

Summary

SbCS1 (SORBI_3004G175500) on sorghum chromosome 4 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, and water homeostasis. It has been linked to chloroplast-nucleus signalling, stomatal complex development, auxin metabolism, and pigmentation. The product localises to the peroxisome membrane, chloroplast thylakoid and envelope, and stress granules. Associations with agronomic traits include water-use efficiency, photosynthetic rate, bacterial blight disease resistance, seed viability, flowering time, leaf senescence, and responses to low temperature, aphids, and viral disease. The gene is also connected to heat stress memory, photoprotection, aluminium toxicity tolerance, and abscisic acid response. Studies of related genes in other species link the family to drought, cold, high light, and bacterial blight responses, as well as chloroplast retrograde signalling.