Toxicity of organotins towards cyanobacterial photosynthesis and nitrogen fixation

Simon V. Avery, Marvin E. Miller, Geoffrey M. Gadd, Geoffrey A. Codd (Lead / Corresponding author), Joseph J. Cooney

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    Inhibition of photosynthesis by a range of organotin compounds in Plectonema boryanum was concentration-dependent and decreased in the order tributyltin (Bu3SnCl) > tripropyltin (Pr3SnCl) ≥ dibutyltin (Bu2SnCl2) ≥ triphenyltin (Ph3SnCl) > triethyltin (Et3SnCl) > trimethyltin (Me3SnCl) > monobutyltin (BuSnCl3). IC50 values were determined for the most toxic organotin species and varied from approximately 1.2 μM for Bu3SnCl to approximately 13 μM for Ph3SnCl. A similar order of inhibition of photosynthesis was observed in Anabaena cylindrica, although here IC50 values were slightly lower (e.g. approximately 1 μM for Bu3SnCl and 5 μM for Ph3SnCl).Nitrogenase activity was generally more sensitive to inhibition by organotin compounds than photosynthesis in A. cylindrica and this was particularlyy evident for Bu2SnCl2; approximate IC50 values for Bu2SnCl2 were 3 and 9 μM, as estimated by nitrogenase activity and photosynthesis, respectively. These results indicate that organotin compounds have the potential to inhibit cyanobacterial metabolism in aquatic systems.

    Original languageEnglish
    Pages (from-to)205-210
    Number of pages6
    JournalFEMS Microbiology Letters
    Volume84
    Issue number2
    DOIs
    Publication statusPublished - 1 Nov 1991

    Keywords

    • Anabaena cylindrica
    • Cyanobacteria
    • Nitrogen fixation
    • Organotins
    • Photosynthesis
    • Plectonema boryanum
    • Toxicity

    ASJC Scopus subject areas

    • Microbiology
    • Molecular Biology
    • Genetics

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