Inhibition of nitrogen fixation by nitrite inAnabaena variabilis |
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Authors: | Herbert Böhme |
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Institution: | (1) Fakhltät für Biologie, Universität Konstanz, D-7750 Konstanz, Federal Republic of Germany;(2) Present address: Department of Molecular Genetics and Cell Biology, The University of Chicaco, 60637 Chicago, II, USA |
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Abstract: | Addition of nitrite to rapidly growing, nitrogen-fixing filaments ofAnabaena variabilis caused an immediate drop in nitrogenase activity. This was followed by a transient induction of nitrite reductase, recovery of nitrogen fixation and cyanobacterial growth. The experiments with isolated heterocysts and a partially purified nitrogenase preparation from heterocysts showed that nitrite primarily exerted its inhibitory effect by inactivating nitrogenase irreversibly, rather than interfering with photosynthetic energy conservation.Abbreviations ATCC
American type culture collection
- Chl
chlorophyll
- FCCP
carbonyl cyanide p-trifluoromethoxy phenylhydrazone
- Tes
2-{2 hydroxy-1,1-bis(hydroxymethyl)ethyl] amino} ethane sulfonic acid |
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Keywords: | Heterocyst Nitrogenase Nitrite Ammonium Ferredoxin: nitrite reductase Cyanobacteria Anabaena variabilis |
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