psaD — Pisum sativum

Summary

PSAT4G210680 (symbol psaD, preferred name PsPSAD1) encodes a protein of the PsaD_sf family in garden pea (Pisum sativum) on chromosome 4LG4. The product exhibits oxidoreductase activity acting on iron-sulfur proteins as donors, chlorophyll binding, and protein domain-specific binding. It localizes to the photosystem I reaction center, chloroplast thylakoid membrane, and thylakoid. The gene is associated with photosynthetic electron transport in photosystem I, light harvesting in photosystem I, response to high and low light intensity, chlorophyll fluorescence, leaf development, response to cold, and acquisition of seed longevity. Associations with photosynthetic rate, seed dormancy, plant growth and development, root morphology, and organ identity have been noted. Phenotypic connections include reduced chloroplast grana stacks, dwarfism, pale green leaves, reduced seed longevity, impaired photosynthesis, altered silique and leaf curvature, and organ size. Studies of related genes in other species link the family to photosystem I stability and photoinhibition resistance.