Open AccessAlteration of exopolysaccharide composition in Rhizobium meliloti JJ‐1 exposed to manganese
Author(s) -
Appanna V.D.
Publication year - 1988
Publication title -
fems microbiology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 151
eISSN - 1574-6968
pISSN - 0378-1097
DOI - 10.1111/j.1574-6968.1988.tb02927.x
Subject(s) - manganese , galactose , mannose , carbohydrate , chemistry , composition (language) , polysaccharide , bacteria , biochemistry , food science , biology , organic chemistry , philosophy , linguistics , genetics
Rhizobium meliloti JJ‐1 grown in a medium rich in manganese elaborated an exopolysaccharide (EPS) that showed marked differences from that produced in the same medium deficient in added manganese. Glucose, galactose and mannose appeared to be the primary carbohydrate constituents of the EPS isolated from the spent fluid of the control culture, while that from the manganese‐enriched broth was comprised mainly of glucose and galactose. Examination of these biopolymers by 13 C‐NMR spectroscopy also revealed substantial differences in their non‐carbohydrate moieties.