XTH — Solanum lycopersicum

Summary

SOLYC11G065600.2 (SlXTH) on tomato chromosome 11 encodes a xyloglucan endotransglucosylase/hydrolase (XTH) family protein with endoxyloglucan transferase and O-glucosyl hydrolase activities, and polysaccharide binding. It is localized to the apoplast and plant-type cell wall. The gene is associated with cell wall disassembly and assembly, cellulose and arabinan metabolism, fruit abscission and dehiscence, carpel formation, and responses to ultrasound. It is linked to fruit traits including fruit type, length, shape, size, weight, firmness, softening, and shelf life, as well as sugar content, cellulose content, stem diameter, leaf number, plant height, and water use efficiency. Additional associations include cytokinin and fatty acid breakdown, lycopene and sucrose anabolism, the GABA shunt, TOR signaling, and pH reduction. Related genes in other species confirm the family's xyloglucan endotransglucosylase activity (EC 2.4.1.207).