CAB1 — Capsicum annuum

Summary

CaCAB1 (T459_08724) on pepper chromosome 3 encodes a chlorophyll a-b binding protein, a component of the light-harvesting complexes. The gene is associated with photosynthesis, specifically light harvesting in photosystems I and II, and with chlorophyll binding, xanthophyll binding, and chlorophyll b synthesis activity. It is linked to chlorophyll breakdown, pigmentation, and responses to low light, desiccation, herbicide, and drought. Localisation evidence places the product in the thylakoid membrane, photosystem II, and the light-harvesting complex II. The gene has been connected to numerous agronomic traits including chlorophyll content, net photosynthetic rate, fruit color, leaf yellowing tolerance, bacterial blight disease resistance, and responses to high and low temperature stress. Studies of related genes in other species link the family to photosystem II function, non-photochemical quenching, and chloroplast biogenesis.