Abstract
The effect of salt on photosynthetic activity, acetylene reduction, and related activities was examined in two species of cyanobacteria, Nostoc muscorum and Calothrix scopulorum. Photosynthesis was more resistant to high salt concentration than was N2 fixation. The salt resistance of both activities increased after a period of exposure of the cells to salinity. The transfer of electrons via ferredoxin and ferredoxin-nicotinamide adenine dinucleotide phosphate reductase was found to be extremely sensitive to salt. In comparison, the transfer of reducing power by glucose-6-phosphate dehydrogenase, isocitric dehydrogenase, and photosystem 1 was less affected by NaCl, whereas glutamine synthetase exhibited higher tolerance to salt.
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Selected References
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- Allen M. B., Arnon D. I. Studies on Nitrogen-Fixing Blue-Green Algae. I. Growth and Nitrogen Fixation by Anabaena Cylindrica Lemm. Plant Physiol. 1955 Jul;30(4):366–372. doi: 10.1104/pp.30.4.366. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Dutton J. E., Rogers L. J. Isoelectric focusing of ferredoxins, flavordoxins and a rubredoxin. Biochim Biophys Acta. 1978 Dec 20;537(2):501–506. doi: 10.1016/0005-2795(78)90535-4. [DOI] [PubMed] [Google Scholar]
- LOWRY O. H., ROSEBROUGH N. J., FARR A. L., RANDALL R. J. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed] [Google Scholar]
- Nelson N., Neumann J. Interaction between ferredoxin and ferredoxin nicotinamide adenine dinucleotide phosphate reductase in pyridine nucleotide photoreduction and some partial reactions. I. Inhibition of ferredoxin nicotinamide adenine dinucleotide phosphate reductase by ferredoxin. J Biol Chem. 1969 Apr 10;244(7):1926–1931. [PubMed] [Google Scholar]
- STEWART D. P. NITROGEN FIXATION BY MYXOPHYCEAE FROM MARINE ENVIRONMENTS. J Gen Microbiol. 1964 Sep;36:415–422. doi: 10.1099/00221287-36-3-415. [DOI] [PubMed] [Google Scholar]
- Smith R. V., Noy R. J., Evans M. C. Physiological electron donor systems to the nitrogenase of the blue-green alga Anabaena cylindrica. Biochim Biophys Acta. 1971 Nov 2;253(1):104–109. doi: 10.1016/0005-2728(71)90238-6. [DOI] [PubMed] [Google Scholar]
- Stewart W. D., Rowell P. Effects of L-methionine-DL-sulphoximine on the assimilation of newly fixed NH3, acetylene reduction and heterocyst production in Anabaena cylindrica. Biochem Biophys Res Commun. 1975 Aug 4;65(3):846–856. doi: 10.1016/s0006-291x(75)80463-3. [DOI] [PubMed] [Google Scholar]
- Tel-Or E., Luijk L. W., Packer L. An inducible hydrogenase in cyanobacteria enhances n2 fixation. FEBS Lett. 1977;78(1):49–52. doi: 10.1016/0014-5793(77)80270-6. [DOI] [PubMed] [Google Scholar]
- Thomas J., Wolk C. P., Shaffer P. W., Austin S. M., Galonsky A. The initial organic products of fixation of 13N-labeled nitrogen gas by the blue-green alga Anabaena cylindrica. Biochem Biophys Res Commun. 1975 Nov 17;67(2):501–507. doi: 10.1016/0006-291x(75)90840-2. [DOI] [PubMed] [Google Scholar]