Plant Physiol. Drug Metab Dispos
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Plant Physiology 54:109-115 (1974)
© 1974 American Society of Plant Biologists

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Articles

The Structure of Plant Cell Walls

VI. A Survey of the Walls of Suspension-cultured Monocots 1

David Burke2, Peter Kaufman3, Michael McNeil and Peter Albersheim4

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

The primary cell walls of six suspension-cultured monocots and of a single suspension-cultured gymnosperm have been investigated with the following results: (a) the compositions of all six monocot cell walls are remarkably similar, despite the fact that the cell cultures were derived from diverse tissues; (b) the cell walls of suspension-cultured monocots differ substantially from those of suspension-cultured dicots and from the suspension-cultured gymnosperm; (c) an arabinoxylan is a major component (40% or more by weight) of monocot primary cell walls; (d) mixed {beta}-1,3; {beta}-1,4-glucans were found only in the cell wall preparations of rye grass endosperm cells, and not in the cell walls of any of the other five monocot cell cultures nor in the walls of suspension-cultured Douglas fir cells; (e) the monocot primary cell walls studied contain from 9 to 14% cellulose, 7 to 18% uronic acids, and 7 to 17% protein; (f) hydroxyproline accounts for less than 0.2% of the cell walls of monocots. Similar data on the soluble extracellular polysaccharides secreted by these cells are included.

2 Present address: Department of Microbiology, New York State University, Stony Brook, N.Y. 11790.

3 Present address: Department of Botany, University of Michigan, Ann Arbor, Mich. 48104.

4 To whom reprint requests should be addressed.

1 Supported in part by United States Atomic Energy Commission Contract AT(11-1)-1426.






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1974 by the American Society of Plant Biologists