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Cell wall hydroxyproline-polysaccharide associations in Lupinus hypocotyls by J.A. Monro; R.W. Bailey; D. Penny is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Extraction of lupin hypocotyl cell walls with guanidine thiocynate, both before and after dilute acid treatment, does not dissolve the hydroxyproline indicating that compounds containing this amino acid are probably covalently linked to insoluble wall constituents other than through acid labile arabinofuranose-hydroxyprolint links. Dilute alkali dots extract all of the wall hydroxyprolinc largely as non-dialysable material, Sequential extraction of cell walls with alkali at two temperatures (2" and 22-25") removes most of the hemicellulose at the lower temperature but only dissolves the hydroxyproline at the higher temperature. Other studies show that the hydroxyproline containing polymer is co-precipitated with hemicellulose-B arabino-xylan. When cell walls from elongating and non-elongating hypocotyl sections are compared using this sequential extraction. the hemicellulose-B arabino-xylan containing hydroxyproline from the non-elongating wall has a much higher proportion of arabinose and galactose than the same polymer from the elongating wall. Much more of the hydroxyproline from the elongating wall is dialysable. These results indicate more bonding of the hydroxyproline-contain

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Author

J.A. Monro; R.W. Bailey; D. Penny

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0031-9422)

Published

1974

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)