Affiliation:
1. Northern 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.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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