CS1 — Sorghum bicolor

Summary

SbCS1 (SORBI_3006G084400) 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, H₂O₂-mediated signaling, water homeostasis, and auxin metabolism. It has been linked to chloroplast-nucleus signaling, stomatal complex development, and leaf patterning. Associations include bacterial blight disease resistance, viral disease response, aphid response, and traits such as water-use efficiency, photosynthetic rate, flowering time, seed viability, leaf senescence, and low-temperature stress tolerance. The product localises to the peroxisome membrane, chloroplast thylakoid, and stress granules. Studies of related genes in other species connect the family to drought stress, high-light tolerance, thermomemory, and bacterial blight resistance.