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Plant Physiology 43:914-922 (1968)
© 1968 American Society of Plant Biologists

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Articles

Changes in Cell Wall Polysaccharides Associated With Growth 1

Donald J. Nevins2, Patricia D. English3 and Peter Albersheim

Department of Chemistry, University of Colorado, Boulder, Colorado 80302

Changes in the polysaccharide composition of Phaseolus vulgaris, P. aureus, and Zea mays cell walls were studied during the first 28 days of seedling development using a gas chromatographic method for the analysis of neutral sugars. Acid hydrolysis of cell wall material from young tissues liberates rhamnose, fucose, arabinose, xylose, mannose, galactose, and glucose which collectively can account for as much as 70% of the dry weight of the wall. Mature walls in fully expanded tissues of these same plants contain less of these constituents (10%-20% of dry wt). Gross differences are observed between developmental patterns of the cell wall in the various parts of a seedling, such as root, stem, and leaf. The general patterns of wall polysaccharide composition change, however, are similar for analogous organs among the varieties of a species. Small but significant differences in the rates of change in sugar composition were detected between varieties of the same species which exhibited different growth patterns. The cell walls of species which are further removed phylogenetically exhibit even more dissimilar developmental patterns. The results demonstrate the dynamic nature of the cell wall during growth as well as the quantitative and qualitative exactness with which the biosynthesis of plant cell walls is regulated.

2 Postdoctoral Fellow of the National Institute of General Medical Sciences (National Institutes of Health, No. 5-F2-GM-29, 861-02). Present address: Department of Botany and Plant Pathology, Iowa State University, Ames, Iowa 50010.

3 Predoctoral Fellow of the United State Department of Health, Education and Welfare under Title IV of the National Defense Education Act.

1 Supported in part by a grant from the United States Atomic Energy Commission No. AT (11-1)-1426.






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Copyright © 1968 by the American Society of Plant Biologists