POR — Cucumis sativus

Summary

CSA_4G638340 (POR, also known as CsPOR1, CsPORA, CsPORB, CsPOR-C, PORC, PORB, PORA, CsPORC) in cucumber (Cucumis sativus) on chromosome 4 encodes a protochlorophyllide reductase with NADPH dehydrogenase activity, belonging to the short-chain dehydrogenase/reductase family. This gene is associated with chlorophyll and carotenoid metabolism, pigment accumulation, and chloroplast development. It has been linked to traits including leaf and fruit color, chlorophyll content, net photosynthetic rate, water use efficiency, plant height, and linolenic acid content. Associations also include stigma development, cytokinin metabolism, and responses to low-temperature and arsenic stress. The encoded protein localizes to plastid membranes, including the chloroplast thylakoid and envelope. Studies of related genes in other species connect the family to chlorophyll biosynthesis, photoprotection, drought tolerance, and chloroplast biogenesis.