DM1 — Solanum lycopersicum

Summary

SlDM1 (SOLYC08G080090.3) on tomato chromosome 8 encodes a Staygreen family protein with multiple enzyme activities, including 7-hydroxymethyl chlorophyll A reductase, pheophytinase, chlorophyll b reductase, RCC reductase, pheophorbide A oxygenase, and polyamine oxidase activities. The protein localizes to plastid thylakoid membranes and chloroplast envelopes. SlDM1 is associated with regulation of chlorophyll catabolism, chlorophyll a breakdown, the chlorophyll cycle, carotenoid and isoprenoid metabolism, lycopene and vitamin E biosynthesis, polyamine breakdown, and hydrogen sulfide metabolism. It has been linked to fruit color, lycopene and carotenoid content, chlorophyll content, leaf yellowing tolerance, leaf senescence, yield, sugar content, anthocyanin content, quantum yield, photochemical quenching, disease tolerance, salt tolerance, drought tolerance, abscisic acid sensitivity, cytokinin sensitivity, seed maturation, and root morphology.