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Biosynthesis of Soil Polysaccharides: I. Glucose and Alfalfa Tissue Substrates¹

ABSTRACT

Glucose, galactose, mannose, arabinose, xylose, rhamnose, fucose, ribose (trace), uronic acid, and five unidentified sugars were chromatographically separated from hydrolysates of polysaccharides extracted from soil which had been incubated with glucose-1-C-14 or C¹⁴-alfalfa tissue. All sugars in the polysaccharide became labeled during the incubation period, but glucose, galactose, and mannose contained more carbon-14 than other sugars. Xylose was present in greatest concentration. Concentrations of glucose, galactose, mannose, arabinose, and rhamnose were similar.

¹ Journal paper No. 34–62 of the Ohio Agr. Exp. Sta., published with permission of the Director as a collaborator under North Central Region Cooperative Project (NC-17) entitled "Value of Organic Matter and Soil and Crop Management Practices in Improving Soil Structure and Productivity." Taken in part from the M.S. thesis of the Senior Author, Ohio State University, 1961. Presented before Div. III, Nov. 30, 1961, at St. Louis, Mo.

² Research Assistant and Professor, respectively, Ohio Agr. Exp. Sta. and the Ohio State University.

Received for publication April 4, 1962. Accepted for publication October 30, 1962.