Inositol Metabolism in Plants. V. Conversion of Myo-inositol to Uronic Acid and Pentose Units of Acidic Polysaccharides in Root-tips of Zea mays.

Plant Physiology
R M RobertsF Loewus


The metabolism of myo-inositol-2-(14)C, d-glucuronate-1-(14)C, d-glucuronate-6-(14)C, and l-methionine-methyl-(14)C to cell wall polysaccharides was investigated in excised root-tips of 3 day old Zea mays seedlings. From myo-inositol, about one-half of incorporated label was recovered in ethanol insoluble residues. Of this label, about 90% was solubilized by treatment, first with a preparation of pectinase-EDTA, then with dilute hydrochloric acid. The only labeled constituents in these hydrolyzates were d-galacturonic acid, d-glucuronic acid, 4-O-methyl-d-glucuronic acid, d-xylose, and l-arabinose, or larger oligosaccharide fragments containing these units. Medium external to excised root-tips grown under sterile conditions in myo-inositol-2-(14)C contained labeled polysaccharide.When label was supplied in the form of d-glucuronate, the pattern of labeled uronic acid and pentose units in cell wall polysaccharides resembled that obtained from labeled myo-inositol, indicating that both substances were metabolized along a common path during polysaccharide formation, and that methylation occurred at a step subsequent to uronic acid formation. When label was supplied in the form of l-methionine-methyl-(14)C, 4-O-methyl-d-glucuronic ...Continue Reading


Sep 26, 1967·Biochimica Et Biophysica Acta·R Bianchetti, M L Sartirana
Jun 1, 1967·Experimental Cell Research·R M Roberts, V S Butt
Mar 1, 1967·Archives of Biochemistry and Biophysics·R M RobertsF Loewus
Oct 26, 1967·Biochemical and Biophysical Research Communications·W TannerO Kandler
Feb 26, 1960·Biochimica Et Biophysica Acta·B J FINKLEF A LOEWUS
Oct 1, 1962·Analytical Biochemistry·T BITTER, H M MUIR
Apr 20, 1962·Biochemical and Biophysical Research Communications·F A LOEWUS, S KELLY
Mar 1, 1958·Plant Physiology·W G Slater, H Beevers
Nov 1, 1966·Plant Physiology·W Tanner, O Kandler

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Jan 1, 1978·Planta·I B Maiti, F A Loewus
Dec 1, 1968·Archives of Biochemistry and Biophysics·R M Roberts
Sep 1, 1970·Plant Physiology·K C Tovey, R M Roberts
Nov 1, 1977·Plant Physiology·A K Mattoo, M Lieberman
Oct 17, 1969·Annals of the New York Academy of Sciences·F Loewus

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