PPC — Sorghum bicolor

Summary

SORBI_3004G106900 (SbPPC) encodes a phosphoenolpyruvate carboxylase (EC 4.1.1.31). This sorghum gene on chromosome 4 is associated with C4 photosynthesis, phloem sucrose loading, stomatal opening, seed germination, leaf development, cell division, and the TCA cycle. It has been linked to grain filling period, anthesis time, photosynthetic rate, stomatal resistance, leaf chlorosis, nitrate uptake, root morphology, and seedling growth traits. The encoded protein shows phosphoenolpyruvate carboxylase activity and protein binding, localizes to the cytosol, chloroplast stroma, plasmalemma, and other compartments, and is associated with brassinosteroid-mediated signalling, phosphate starvation response, and hypersensitivity. Studies of related genes in other species link the family to salt stress tolerance, phosphate deficiency response, and anaplerotic metabolism.