RS4 — Solanum tuberosum

Summary

StRS4 (PGSC0003DMG400009017) on potato chromosome 1 encodes a glycosyl hydrolase 36 family protein with raffinose synthase and galactinol-raffinose galactosyltransferase activity. The gene is associated with stachyose and oligosaccharide anabolism, secondary metabolite biosynthesis, sucrose anabolism, and responses to heat and oxidative stress. It has been linked to seed size and photosynthetic rate. Studies of related genes in other species connect the family to fruit yield, fruit dry weight, fruit length, fruit size, sugar and sucrose content, seed longevity, seed growth and development, drought tolerance, low temperature stress tolerance, seed germination, stachyose biosynthesis, carbohydrate distribution, phloem loading, source-sink regulation, carbon partitioning, nematode infection response, cytokinin content, transpiration rate, stomatal resistance, leaf number, and starch mobilization.