SGR — Brassica oleracea

Summary

BoSGR (BOLC102_C07P057180.1) on cabbage chromosome 7 encodes a Staygreen family protein with pheophytinase, RCC reductase, Chl b reductase, 7-hydroxymethyl chlorophyll a reductase, pheophorbide a oxygenase, and polyamine oxidase activities, along with chlorophyll and mRNA binding. It is associated with the chlorophyll cycle, regulation of chlorophyll catabolism, polyamine breakdown, programmed cell death, the hypersensitive response, and PSII light-harvesting complex II catabolism. Localized to chloroplast membranes, thylakoids, and the apoplast, BoSGR is linked to the stay-green trait, leaf yellowing tolerance, chlorophyll content, leaf senescence, yield, flavonoid content, disease tolerance, salt tolerance, drought tolerance, abscisic acid and cytokinin sensitivity, root and cotyledon morphology, and light intensity response. Studies of related genes in other species connect the family to chlorophyll degradation, leaf senescence, and the stay-green phenotype.