ISSN:
1573-0972
Keywords:
Adenylate cyclase
;
amino acid sensitivity
;
exopolysaccharide
;
nodulation
;
Rhizobium meliloti
;
Tn5 mutagenesis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Abstract Six Rhizobium meliloti mutants were isolated after Tn5-mediated mutagenesis as resistant to inhibition by a mixture of amino acids (serine, methionine, glycine and leucine). All were defective in adenylate cyclase activity and failed to form nodules in infected roots of Medicago sativa. Furthermore, like other nodulation mutants, they showed altered motility and increased secretion of exopolysaccharides; addition of cAMP to the growth medium abolished some of these phenotypic defects. The possibility that adenylate cyclase participates in the transduction of signals inducing nodulation is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00327829
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