| Dynamics of microcystin-producing and non-microcystin-producing Microcystis populations is correlated with nitrate concentration in a Japanese lake. | |
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MedLine Citation:
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PMID: 17092296 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Temporal changes in hepatotoxin microcystin-producing and non-microcystin-producing Microcystis aeruginosa populations were examined in Lake Mikata, Japan. To monitor the densities of the total M. aeruginosa population and the potential microcystin-producing subpopulation, we used a quantitative real-time PCR assay targeting the phycocyanin intergenic spacer and the microcystin synthetase gene (mcyA), respectively. During the sampling period, the ratio of the mcyA subpopulation to the total M. aeruginosa varied considerably, from 0.5% to 35%. When surface nitrate concentrations increased, there was a rise in the relative abundance of the mcyA subpopulation. This was a positive correlation with the nitrate concentrations (r=0.53, P<0.05, n=14); whereas temperature and ortho-phosphate had no significant correlation with the presence of mcyA. Our data suggest that high nitrate loading may be a significant factor promoting the growth of the microcystin subpopulations within M. aeruginosa communities in Lake Mikata. |
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Authors:
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Mitsuhiro Yoshida; Takashi Yoshida; Yukari Takashima; Naohiko Hosoda; Shingo Hiroishi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: FEMS microbiology letters Volume: 266 ISSN: 0378-1097 ISO Abbreviation: FEMS Microbiol. Lett. Publication Date: 2007 Jan |
Date Detail:
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Created Date: 2007-02-05 Completed Date: 2007-03-05 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7705721 Medline TA: FEMS Microbiol Lett Country: England |
Other Details:
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Languages: eng Pagination: 49-53 Citation Subset: IM |
Affiliation:
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Department of Marine Bioscience, Fukui Prefectural University, Obama-City, Fukui, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Bacterial Proteins
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genetics DNA, Intergenic / chemistry Fresh Water / chemistry, microbiology* Genotype Japan Microcystins / biosynthesis*, genetics Microcystis / classification, metabolism* Nitrates / analysis* Peptide Synthases / genetics Phycocyanin / genetics Polymerase Chain Reaction Population Density Population Dynamics |
| Chemical | |
Reg. No./Substance:
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0/Bacterial Proteins; 0/DNA, Intergenic; 0/Microcystins; 0/Nitrates; 11016-15-2/Phycocyanin; 77238-39-2/microcystin; EC 6.3.2.-/Peptide Synthases; EC 6.3.2.-/microcystin synthetase A |
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