Nickel regulation of photoautotrophy in a cyanobacterium

descriptionPublicationkeyboard_double_arrow_right Article 01 Aug 1990 English Publisher:Springer Science and Business Media LLCJournal:Water, Air, and Soil Pollution, volume 52, pages 263-276 (issn: 0049-6979, eissn: 1573-2932,

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Authors: Ravi Kumar asthana; Pramod Kumar Pandey; Sureshwar Prasad Ingh;

doi: 10.1007/bf00229438

Nickel regulation of photoautotrophy in a cyanobacterium

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Abstract

Ni inhibited photoautotrophic growth, nitrogenase activity, oxygenic photosynthesis (O2-evolution, 14CO2-uptake) and respiratory O2-uptake in the diazotrophic cyanobacterium, Nostoc muscorum. 14CO2-uptake was more sensitive to Ni compared to nitrogenase activity, O2evolution or respiratory O2-uptake. Lower Ni concentrations (1 μ.M and 5 μM) stimulated N2ase as well as RuBPcase (ribulose bisphosphate carboxylase) activity. It is proposed that Ni inhibition is mainly through the regulation of RuBPcase activity in the cyanobacterium.

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Banaras Hindu University
India

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