Metabolic Studies on Intermediates in the myo-Inositol Oxidation Pathway in Lilium longiflorum Pollen: I. Conversion to Hexoses |
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| Authors: | Rosenfield C L Fann C Loewus F A |
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| Affiliation: | Department of Biological Sciences, State University of New York, Buffalo, New York 14214. |
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| Abstract: | The myo-inositol oxidation pathway was investigated in regard to its role as a source of carbon for products of hexose monophosphate metabolism in germinated pollen of Lilium longiflorum Thunb., cv. Ace. myo-2-14]Inositol and d-1-14C]glucuronate had similar distributions of radioactivity, contributing about three times more label to polysaccharide-bound glucose than myo-2-3H]inositol. In the course of glucogenesis label from the latter appeared as tritiated water in the medium. This exchange could be enhanced by supplying d-5R,5S-3H]xylose instead of myo-2-3H]inositol. When the former was administered, 3H]glucose was the only labeled sugar residue found in polysaccharide products. The soluble constituents of d-5R,5S-3H]xylose-labeled pollen contained no traces of labeled xylose despite massive uptake and utilization. |
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