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- Title
Requirement of borate cross-linking of cell wall rhamnogalacturonan II for Arabidopsis growth.
- Authors
O'Neill, M A; Eberhard, S; Albersheim, P; Darvill, A G
- Abstract
Turgor-driven plant cell growth depends on wall structure. Two allelic l-fucose-deficient Arabidopsis thaliana mutants (mur1-1 and 1-2) are dwarfed and their rosette leaves do not grow normally. mur1 leaf cell walls contain normal amounts of the cell wall pectic polysaccharide rhamnogalacturonan II (RG-II), but only half exists as a borate cross-linked dimer. The altered structure of mur1 RG-II reduces the rate of formation and stability of this cross-link. Exogenous aqueous borate rescues the defect. The reduced cross-linking of RG-II in dwarf mur1 plants indicates that plant growth depends on wall pectic polysaccharide organization.
- Publication
Science (New York, N.Y.), 2001, Vol 294, Issue 5543, p846
- ISSN
0036-8075
- Publication type
Journal Article
- DOI
10.1126/science.1062319