CS1 — Sorghum bicolor

Summary

SbCS1 (SORBI_3001G410200) on sorghum chromosome 1 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, and reactive oxygen species homeostasis, as well as water transport, auxin metabolism, and chloroplast-nucleus signaling. It has been linked to traits including water use efficiency, photosynthetic rate, stomatal resistance, leaf senescence, flowering time, seed viability, and bacterial blight disease resistance. Associations also extend to adventitious root development, inflorescence morphology, and responses to abiotic stresses such as low temperature, high light, and aluminum toxicity. The encoded protein localizes to the peroxisome membrane, chloroplast thylakoid, and stress granules, and is connected to pathways in gravitropism, root angle formation, and detoxification.