psbA — Capsicum annuum

Summary

T459_08658 (psbA) on pepper chromosome 3 encodes the Photosystem II D1 protein, a core component of the photosynthetic reaction centre. The gene product possesses oxidoreductase activity acting on diphenols with oxygen as acceptor, oxygen-evolving activity, chlorophyll binding, electron transfer activity, and iron binding. It localises to the photosystem II complex in the chloroplast thylakoid membrane and is associated with photosynthetic electron transport in photosystem II. The gene is associated with response to herbicide and regeneration. In pepper, psbA is linked to photosynthetic rate (CO2-based) and photosystem II function. Studies of related genes in other species connect the family to traits including leaf chlorophyll content, net photosynthetic rate, quantum yield, photochemical quenching, fruit colour and weight, specific leaf weight, carbohydrate, starch, sugar and protein content, and salt tolerance.