Manganous ion oxidation at pH values below 5.0 by cell-free substances from streptomyces sp. Cultures

https://doi.org/10.1016/0038-0717(79)90086-5Get rights and content

Abstract

Liquid cultures of a soil Streptomyces sp. produced extra-cellular, non-dialysable substances which when mixed with 0.5 mM manganese sulphate precipitated manganese oxide. Quantitative studies on the rate of manganese oxidation showed that these substances were unique since their optimum pH for oxidation was about pH 5.0 and they were unable to oxidize manganese at pH 6.5–7.5. Oxidation was also completely inhibited at pH 4.0 but not at pH 4.5.

The active substances were only detected in liquid cultures that were at least 4 weeks old. These cultures also contained lower molecular weight substances that inhibited oxidation but these were readily removed by dialysis or ultra-filtration.

References (13)

  • S.M. Bromfield et al.

    Sorption and oxidation of manganous ion and reduction of manganese oxide by cell suspensions of a manganese oxidizing bacterium

    Soil Biol. Biochem.

    (1976)
  • M.W. Beijerinck

    Oxydation des Mangancarbonates durch Bakterien und Schimmelpilze

    Folia Microbiol. Delft

    (1913)
  • S.M. Bromfield

    Oxidation of manganese by soil microorganisms

    Aust. J. biol. Sci.

    (1956)
  • S.M. Bromfield

    Bacterial oxidation of manganous ions as affected by organic substrate concentration and composition

    Soil Biol. Biochem.

    (1974)
  • S.M. Bromfield

    The deposition of manganese oxide by an alga on acid soil

    Aust. J. Soil Res.

    (1976)
  • S.M. Bromfield

    The oxidation of manganous ions under acid conditions by an acidophilous actinomycete isolated from acid soil

    Aust. J. Soil Res.

    (1978)
There are more references available in the full text version of this article.

Cited by (13)

View all citing articles on Scopus
View full text