DM1 — Cucumis melo

Summary

MELO3C005616.2 (CmDM1) on melon chromosome 10 encodes a Staygreen family protein with multiple annotated enzymatic activities, including 7-hydroxymethyl chlorophyll a reductase, pheophytinase, chlorophyll b reductase, pheophorbide a oxygenase, and polyamine oxidase activities. The gene is associated with chlorophyll metabolism and breakdown, regulation of chlorophyll catabolic processes, fruit ripening and development, flower development, chloroplast organization, defense responses to bacteria and other organisms, and regulation of programmed cell death and the hypersensitive response. It localizes to plastid thylakoid membranes, chloroplast membranes, and thylakoids. Associations include leaf yellowing tolerance, chlorophyll content, yield traits, disease tolerance, salt tolerance, drought tolerance, cytokinin and abscisic acid sensitivity, root morphology, and hybrid incompatibility. Studies of related genes in other species link the family to chlorophyll degradation and leaf senescence.