STA (PSAT4G033960) — Pisum sativum

Summary

PsCOP1 (STA, PSAT4G033960) on garden pea chromosome 4LG4 encodes a sugar transport protein 7 with monosaccharide transmembrane transporter activity and a ubiquitin ligase substrate adaptor function. It is associated with regulation of phytochrome signaling, response to red or far-red light, upregulation of photosynthesis, leaf formation, and lateral root development. The gene is linked to traits including grain yield, leaf area, flower diameter, inflorescence number, root system morphology, plant growth hormone response, and sensitivity to UV-A, far-red light, copper, glyphosate, and nitrogen. Phenotypic associations include seed longevity, salinity stress tolerance, seed development, pollen germination, cell wall integrity, early flowering, altered light response, and chlorophyll content. Studies of related genes in other species link the family to photomorphogenesis, anthocyanin pigmentation, shade avoidance, and pathogen defense.