PAO — Capsicum annuum

Summary

CaPAO (T459_28715) on pepper chromosome 11 encodes a pheophorbide a oxygenase, chloroplastic, a Rieske 2Fe-2S domain-containing enzyme with pheophorbide a oxygenase, 7-hydroxymethyl chlorophyll a reductase, pheophytinase, RCC reductase, and chlorophyll b synthesis activities, along with iron, Fe/S, and chlorophyll binding. The gene is associated with chlorophyll metabolism and breakdown, the chlorophyll cycle, carotenoid and flavonoid metabolism, leaf formation, pigmentation, regulation of programmed cell death and the hypersensitive response, and protein-chloroplast targeting. It localizes to chloroplast membranes, thylakoids, and the apoplast. Associations include leaf yellowing tolerance, stem senescence, fruit color, yield, chlorophyll content, disease tolerance, salt tolerance, photosynthetic efficiency, seed maturation, and root morphology. Related genes in other species link the family to cell death, leaf yellowing, chlorophyll catabolism, and stay-green phenotypes.