EXT — Brassica napus

Summary

BnEXT (EXT, XTH4) on chromosome A03 of oilseed rape (Brassica napus) encodes a beta-glucanase/xyloglucan endotransglucosylase/hydrolase (XTH) family protein with endoxyloglucan transferase and O-glucosyl hydrolase activities, and polysaccharide binding. The product localises to the plant-type cell wall, apoplast, plasmodesma, and extracellular space. BnEXT is associated with cell wall biogenesis, xylem development, cell morphogenesis, xyloglucan metabolism, and responses to mechanical and low-light stimuli. It is linked to hormone, proline, inositol, and phenylpropanoid metabolism, as well as biological regulation and lateral inhibition. Trait associations include hybrid incompatibility, root length, plant height, and salt tolerance. Phenotypic connections involve secondary wall thickening, wood cell expansion, and internode elongation. Related genes in other species are linked to cell wall modification.