Growth-related substituent changes in exopolysaccharides of fast-growing rhizobia
M C Cadmus1, K A Burton, M E Slodki
1Northern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, Peoria, Illinois 61604.
Abstract:
Pyruvic acid and O-acetyl groups are the major noncarbohydrate substituents in exopolysaccharides (EPS) produced by fast-growing species of Rhizobium. EPS substituent variations were observed among strains of the same species. The amounts of these substituents also varied with culture age; pyruvic acid increased in the EPS of all four species, whereas O-acetyl increased in Rhizobium trifolii and R. leguminosarum EPS, decreased in R. meliloti EPS, and remained constant in R. phaseoli EPS. The use of glycerol as a substrate for R. meliloti significantly increased EPS yields, whereas mannitol increased those of the other three Rhizobium species.
Related Concept Videos
The Roles of Bacteria and Fungi in Plant Nutrition
Peptidoglycan Synthesis
Gene Regulation During Sporulation
Stringent Response in E. coli
Bioreactor Controls-III
Production of Organic Acids


