title: Xyloglucan endotransglucosylase action is high in the root elongation zone and in the trichoblasts of all vascular plants from Selaginella to Zea mays.
abstract: The endotransglucosylase action of the enzyme xyloglucan endotransglucosylase/hydrolase (XTH) was localized in the roots of diverse vascular plants: club-mosses (lycopodiophytes), ferns, gymnosperms, monocots, and dicots. High action was always found in the epidermis cell wall of the elongation zone and in trichoblasts in the differentiation zone. Clearly XTH and its action in root development evolved before the evolutionary divergence of ferns and seed plants and also of the lycopodiophytes and euphyllophytes.
authors.affiliation: Laboratory of Plant Physiology and Morphology, Department of Biology, University of Antwerp (UIA), Universiteitsplein 1, B-2610 Wilrijk, Belgium.
authors.forename: K
authors.initials: K
authors.lastname: Vissenberg
authors.forename: V
authors.initials: V
authors.lastname: Van Sandt
authors.forename: S C
authors.initials: SC
authors.lastname: Fry
authors.forename: J-P
authors.initials: JP
authors.lastname: Verbelen
mesh_terms: D032462:Cycadopsida / Q000201:enzymology; D016695:Glycosyltransferases / Q000378:metabolism*; D019684:Magnoliopsida / Q000201:enzymology; D059828:Plant Cells; D018517:Plant Roots / Q000201:enzymology*; D010944:Plants / Q000201:enzymology*; D032503:Selaginellaceae / Q000166:cytology / Q000201:enzymology*; D003313:Zea mays / Q000166:cytology / Q000201:enzymology*
chemical_list: D016695:Glycosyltransferases; C473049:xyloglucan - xyloglucosyltransferase