FISCHERELLIN, A NEW ALLELOCHEMICAL FROM THE FRESHWATER CYANOBACTERIUM FISCHERELLA MUSCICOLA1

Authors

  • Elisabeth M. Gross,

    Corresponding author
    1. Max-Planck-Institut für Limnologie, Abteilung Ökophysiologie, D-2320 Plön, Federal Republic of Germany
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  • C. Peter Wolk,

    1. MSU-DOE Plant Research Laboratory and Center for Microbial Ecology, Michigan State University, East Lansing, Michigan 48824-1312
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  • Friedrich Jüttner

    Corresponding author
    1. Max-Planck-Institut für Limnologie, Abteilung Ökophysiologie, D-2320 Plön, Federal Republic of Germany
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    • 3

      Institut für Pflanzenbiologie/Limnologie, Universität Zürich, Seestr. 187, CH-8802 Kilchberg, Switzerland.


  • 1

    Received 22 April 1991. Accepted 1 August 1991.

  • This work was supported by Volkswagen Stiftung (1/63 733) and the U.S. Department of Energy under contract DE-ACO2-76ERO-1338. We gratefully acknowledge helpful discussions with E. von Elert. MPI für Limnologie. during the isolation of fischerellin.

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ABSTRACT

The benthic cyanobacterium Fischerella muscicola (Thur.) Gom. UTEX 1829 produces a secondary metabolite, fischerellin, that strongly inhibits other cyanobacteria and to a lesser extent members of the Chlorophyceae. Eubacteria are not affected. The major active compound is lipophilic and exhibits a molecular ion at m/z 408. It is heat- and acid-stable but decomposes in 1 M sodium hydroxide (80° C. 1 h). Fischerellin inhibits the photosynthetic but not the respiratory electron transport of cyanobacteria and chlorophytes. Its site of action is located in PS II. Two other species of Fischerella also produce fischerellin, indicating that the synthesis of such allelochemicals might be characteristic of the genus.

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