Inositol Metabolism in Plants. III. Conversion of Myo-inositol-2-H to Cell Wall Polysaccharides in Sycamore (Acer pseudoplatanus L.) Cell Culture.

Plant Physiology
R M Roberts, F A Loewus


Prolonged growth of cell cultures of sycamore (Acer pseudoplatanus L.) on agar medium containing myo-inositol-2-(3)H resulted in incorporation of label predominately into uronosyl and pentosyl units of cell wall polysaccharides. Procedures normally used to distinguish between pectic substance and hemicellulose yielded carbohydrate-rich fractions with solubility characteristics ranging from pectic substance to hemicellulose yet the uronic acid and pentose composition of these fractions was decidedly pectic. Galacturonic acid was the only uronic acid present in each fraction. Subfractionation of alkali-soluble (hemicellulosic) polysaccharide by neutralization followed by ethanol precipitation gave 3 fractions, a water-insoluble, an ethanol-insoluble, and an ethanol-soluble fraction, each progressively poorer in galacturonic acid units and progressively richer in arabinose units; all relatively poor in xylose units.Apparently, processes involved in biosynthesis of primary cell wall continued to produce pectic substance during cell enlargement while processes leading to biosynthesis of typically secondary cell wall polysaccharide such as 4-0-methyl glucuronoxylan were not activated.


Jul 1, 1965·Proceedings of the National Academy of Sciences of the United States of America·A W Ruesink, K V Thimann
Nov 19, 1960·Nature·S J KOLLAR, M JARAI
Oct 1, 1962·Analytical Biochemistry·T BITTER, H M MUIR
Dec 15, 1961·Proceedings of the National Academy of Sciences of the United States of America·H N WOOD, A C BRAUN
Oct 15, 1962·Proceedings of the National Academy of Sciences of the United States of America·A C BRAUN, H N WOOD
Jan 1, 1964·Experimental Cell Research·D T LAMPORT
Mar 1, 1962·Proceedings of the National Academy of Sciences of the United States of America·F A LoewusE F Neufeld
Jul 1, 1964·Proceedings of the National Academy of Sciences of the United States of America·R S Loomis, J G Torrey

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Dec 1, 1968·Archives of Biochemistry and Biophysics·R M Roberts
Oct 17, 1969·Annals of the New York Academy of Sciences·F Loewus
Sep 19, 2019·Plant & Cell Physiology·Tatyana V SavchenkoKatayoon Dehesh

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