SGR — Cucumis sativus

Summary

CSA_5G156180, also known as SGR, DM1, or NYE1 in cucumber (Cucumis sativus) on chromosome 5, encodes a Staygreen family protein with multiple annotated molecular functions including 7-hydroxymethyl chlorophyll A reductase, pheophytinase, chlorophyll b reductase, and pheophorbide A oxygenase activities. The gene is associated with chlorophyll metabolism, the chlorophyll cycle, and regulation of chlorophyll catabolic processes, as well as polyamine breakdown and photosynthetic electron transport. It localizes to chloroplast thylakoid membranes and is linked to leaf senescence, fruit and flower development, defense responses to bacteria and other organisms, and regulation of programmed cell death. Associations include leaf yellowing tolerance, chlorophyll content, yield traits, and responses to abiotic stresses such as low temperature and salinity, as well as disease tolerance including powdery mildew resistance.