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Digitale Medien

Role of noncarbohydrate substitutions of Rhizobium exopolysaccharide in nodulation process (1985)

Skorupska, Anna ; Derylo, Mieczyslawa ; Lorkiewicz, Zbigniew

Springer

Archives of microbiology 143 (1985), S. 307-310

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ISSN: 1432-072X

Schlagwort(e): Exopolysaccharides ; Nodulation ; Rhizobium trifolii ; O-acetyl groups ; Pyruvic acid

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Exopolysaccharides (EPS) of nodulating strains of Rhizobium trifolii and Rhizobium leguminosarum added to red clover seedlings before inoculation reduced the number of nodules. The inhibition of the nodulation was correlated with the amount of EPS. The preparations of EPS from mutants defective in early stages of nodulation (Roa- or Hac-) did not affect the nodulation, whereas EPS from mutants deficient in late stages (post Hac-) exerted an inhibitory effect. Inactive preparation of EPS contained less O-acetyl groups and pyruvic acid residues. Deacetylation and depyruvylation of EPS from R. trifolii Nod+ abolished it inhibitory effect. It was concluded that noncarbohydrate substitutions (acetate, pyruvate) are involved in EPS effect.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00411255

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