CAB1 — Cucumis sativus

Summary

CsCAB1 (CSA_7G033300) on cucumber chromosome 7 encodes a protein with the Chloro_AB-bd_pln and Chloroa_b-bind domains, and is annotated with chlorophyll binding, xanthophyll binding, and multiple enzyme activities including chlorophyll b reductase activity and pheophytinase activity. The gene is associated with photosynthesis, light harvesting in photosystems I and II, and downregulation of photosynthesis. It localizes to the thylakoid membrane, photosystem II, and the light-harvesting complex II. CsCAB1 is linked to traits including leaf yellowing tolerance, bacterial blight disease resistance, net photosynthetic rate, quantum yield, chlorophyll ratio, leaf chlorosis, and responses to drought, high temperature, and low temperature stress. Related genes in other species are associated with photosystem II function, state transitions, non-photochemical quenching, and photoprotection.