SSA (TRAESCS2D02G175600) — triticum aestivum

Summary

TRAESCS2D02G175600 (symbol SSA, also known as SUS4) on bread wheat chromosome 2D encodes a sucrose synthase enzyme (EC 2.4.1.13) with sucrose synthase activity, and also possesses DNA binding and transcription factor activity. This gene is associated with sucrose and starch metabolism, endosperm development, callose deposition in phloem sieve plates, and responses to anoxia, hypoxia, flooding, and carbon dioxide. It has been linked to grain yield, grain filling period, starch content, seed protein content, ear number, grains per spike, total soluble sugar content, and photoperiod sensitivity. Additional associations include brassinosteroid and auxin sensitivity, carotenoid and anthocyanin content, root oxidative activity, and responses to high and low temperature stress. The protein localizes to the cytosol, vacuole, plasmodesmata, plastid, mitochondria, and cell wall. Studies of related genes in other species connect the sucrose synthase family to grain quality, seed weight, submergence tolerance, and drought and heat tolerance.