Titre du document / Document title

Cell wall xyloglucan incorporation by xyloglucan endotransglucosylase/hydrolase in pine hypocotyls

Auteur(s) / Author(s)

PEREZ LORENCES Ester ⁽¹⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Dpto Biología Vegetal, Facultad de Farmacia, Universidad de Valencia, Av. Vicente Andres Estellés s/n, 46100 Burjassot, Valencia, ESPAGNE

Résumé / Abstract

In the present study, we have examined the incorporation of labelled xyloglucan oligosaccharides into the cell wall xyloglucan of pine hypocotyl sections, and the effect of plant hormones on the incorporation and on XTH enzyme activity (EC 2.4.1.207). Xyloglucan heptasaccharide [³H]XXXGol was absorbed, transported and incorporated into the cell wall xyloglucan of de-rooted pine hypocotyls. Incorporation of [³H]XXXGol into soluble and cell wall xyloglucan was induced by IAA, brassinolides and XXXG in pine hypocotyl segments. A relationship between growth induction, by IAA, brassinolides and XXXG, and both soluble and cell wall-bound XTH was found. We suggest that IAA induced-growth might be related with an increase in the activity of an XTH with a preference for using xyloglucan oligosaccharides, instead polymeric xyloglucan, as acceptors of the endotransglucosylation reactions.

Revue / Journal Title

Plant science   ISSN 0168-9452   CODEN PLSCE4 

Source / Source

2004, vol. 166, n^o5, pp. 1269-1274 [6 page(s) (article)] (30 ref.)

Langue / Language

Anglais

Editeur / Publisher

Elsevier Science, Shannon, IRLANDE  (1985) (Revue)

Mots-clés anglais / English Keywords

Softwood forest tree ; Spermatophyta ; Gymnospermae ; Coniferales ; Enzyme ; Transferases ; Glycosyltransferases ; Hexosyltransferases ; Pinus ; Auxin ; Growth ; Xyloglucan:xyloglucosyl transferase ; Metabolism ; Glucan ; Hypocotyl ; Cell wall ;

Mots-clés français / French Keywords

Arbre forestier résineux ; Spermatophyta ; Gymnospermae ; Coniferales ; Enzyme ; Transferases ; Glycosyltransferases ; Hexosyltransferases ; Pinus ; Auxine ; Croissance ; Xyloglucan:xyloglucosyl transferase ; Métabolisme ; Glucane ; Hypocotyle ; Paroi cellulaire ;

Mots-clés espagnols / Spanish Keywords

Arbol forestal resinoso ; Spermatophyta ; Gymnospermae ; Coniferales ; Enzima ; Transferases ; Glycosyltransferases ; Hexosyltransferases ; Pinus ; Auxina ; Crecimiento ; Xyloglucan:xyloglucosyl transferase ; Metabolismo ; Glucano ; Hipocotilo ; Pared celular ;

Localisation / Location

INIST-CNRS, Cote INIST : 15982, 35400011704427.0180