Publication Date:
2001-10-27
Description:
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.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉O'Neill, M A -- Eberhard, S -- Albersheim, P -- Darvill, A G -- New York, N.Y. -- Science. 2001 Oct 26;294(5543):846-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Complex Carbohydrate Research Center and Department of Biochemistry and Molecular Biology, University of Georgia, 220 Riverbend Road, Athens, GA 30602-4712, USA. mao@ccrc.uga.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11679668" target="_blank"〉PubMed〈/a〉
Keywords:
Alleles
;
Arabidopsis/chemistry/genetics/*growth & development/metabolism
;
Borates/*metabolism/pharmacology
;
Carbohydrate Conformation
;
Carbohydrate Sequence
;
Cell Wall/*chemistry/metabolism/ultrastructure
;
Dimerization
;
Fucose/analysis/metabolism/pharmacology
;
Genes, Plant
;
*Glucans
;
Hydro-Lyases/genetics/metabolism
;
Hydrogen-Ion Concentration
;
Molecular Sequence Data
;
Mutation
;
Pectins/*chemistry/*metabolism
;
Plant Leaves/chemistry/growth & development/metabolism
;
Polysaccharides/chemistry/metabolism
;
*Xylans
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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