Golgi-mediated synthesis and secretion of matrix polysaccharides of the primary cell wall of higher plants.
The Golgi apparatus of eukaryotic cells is known for its central role in the processing, sorting, and transport of proteins to intra- and extra-cellular compartments. In plants, it has the additional task of assembling and exporting the non-cellulosic polysaccharides of the cell wall matrix including pectin and hemicelluloses, which are important for plant development and protection. In this review, we focus on the biosynthesis of complex polysaccharides of the primary cell wall of eudicotyledonous plants. We present and discuss the compartmental organization of the Golgi stacks with regards to complex polysaccharide assembly and secretion using immuno-electron microscopy and specific antibodies recognizing various sugar epitopes. We also discuss the significance of the recently identified Golgi-localized glycosyltransferases responsible for the biosynthesis of xyloglucan (XyG) and pectin.
Laboratoire ‶Glycobiologie et Matrice Extracellulaire Végétale″, UPRES EA 4358, Institut Federatif de Recherche Multidisciplinaire sur les Peptides, Plate-forme de Recherche en Imagerie Cellulaire de Haute Normandie, Université de Rouen Mont Saint Aignan, France.
Azeddine
A
Driouich
Marie-Laure
ML
Follet-Gueye
Sophie
S
Bernard
Sumaira
S
Kousar
Laurence
L
Chevalier
Maïté
M
Vicré-Gibouin
Olivier
O
Lerouxel