Morphological variability of colonies of Microcystis morphospecies in culture.

Otsuka, Shigeto; Suda, Shoichiro; Li, Renhui; Matsumoto, Satoshi; Watanabe, Makoto M.

doi:10.2323/jgam.46.39

Cited by 153 publications

(118 citation statements)

References 9 publications

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“…There are several examples showing the clear necessity of applying polyphasic approach in taxonomy of cyanobacteria (Castenholz, 1992;Palinska et al, 1996;Otsuka et al, 2000;Lyra et al, 2005;Rajaniemi et al, 2005). Palinska et al (1996) indicated in their studies on Synechococcus/Synechocystis/ Merismopedia/Eucapsis complex that the great morphological diversity observed in nature and (partially) in culture does not necessarily reflect genetic diversity.…”

Section: Molecular Phylogeny Markers In Cyanobacterial Classificationmentioning

confidence: 99%

“…chromatic adaptations, salinity tolerance, vitamin requirements) were proved to be variable with changing environmental and culture conditions (Rippka et al, 1979;Dor & Hornhoff, 1985;Holtkamp, 1985;Castenholz & Waterbury, 1989;Palinska et al, 1996;Otsuka et al, 2000;Lyra et al, 2005;Rajaniemi et al, 2005).…”

Section: Molecular Phylogeny Markers In Cyanobacterial Classificationmentioning

confidence: 99%

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Taxonomy of cyanobacteria: a contribution to consensus approach

Palińska

Surosz

2014

Hydrobiologia

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Diversity of Cyanophyceae/cyanobacteria is expressed by their morphological, biochemical and physiological properties, which enable them to settle and persist in a wide range of habitats. Their diverse morphology determined their taxonomic distinction based on phenotypic properties. The oxygenic photosynthesis which characterizes cyanobacteria and their sharing of ecological niches with eukaryotic algae, prompted their treatment in the phycological circles, where they were called blue-green algae, although their prokaryotic nature, akin to bacteria, has been recognized for over a century. The cyanobacteria are named under Botanical and Bacteriological Codes, and the usage of both systems at the same time causes considerable confusion as the rules of the Botanical Code are quite different from those of the Bacteriological one. Herbarium collections are perfect subjects for intensive phylogenetic studies and therefore can contribute to discussions on the traditional and newly emerging concepts of species and speciation in prokaryotes. This article reviews the present status of the taxonomy of cyanobacteria, describes earlier, classical and recent taxonomic approaches and the trends for future, emphasizing improvements in methodology as major catalysts for the progress of this field.

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Section: Molecular Phylogeny Markers In Cyanobacterial Classificationmentioning

confidence: 99%

Section: Molecular Phylogeny Markers In Cyanobacterial Classificationmentioning

confidence: 99%

Taxonomy of cyanobacteria: a contribution to consensus approach

Palińska

Surosz

2014

Hydrobiologia

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“…The major weakness of this morphological approach is the difficulty of maintaining the characteristic features when a strain is isolated from a field sample. Generally isolates cease to grow in colonies and instead form loose aggregates or grow as single cells, prohibiting the retrospective assignment of cultured strains to a species (Otsuka et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Diversity and distribution of Microcystis (Cyanobacteria) oligopeptide chemotypes from natural communities studied by single-colony mass spectrometry

et al. 2004

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Microcystis sp. has been recognized in recent years as a producer of a high number of secondary metabolites. Among these, peptides that are produced by the non-ribosomal peptide synthetase pathway often show bioactivity or are toxic to humans. The production of particular peptides is specific for individual Microcystis clones, allowing their characterization as chemotypes by analysing the peptidome. The authors studied the in situ diversity of peptides and chemotypes in Microcystis communities from lakes in and around Berlin, Germany, by direct analysis of individual colonies by MALDI-TOF mass spectrometry. From 165 colonies analysed a total of 46 individual peptides could be identified, 21 of which have not been described previously. For six of the new peptides the structures could be elucidated from fragment patterns, while for others only a preliminary classification could be achieved. In most colonies, two to ten individual peptides were detected. In 19 colonies, 16 of which were identified as M. wesenbergii, no peptide metabolites could be detected. The peptide data of 146 colonies were subjected to an ordination (principal components analysis). The principal components were clearly formed by the microcystin variants Mcyst-LR, -RR and -YR, anabaenopeptins B and E/F, a putative microviridin, and a new cyanopeptolin. In the resulting ordination plots most colonies were grouped into five distinct groups, while 40 colonies scattered widely outside these groups. In some cases colonies from different lakes clustered closely, indicating the presence of similar chemotypes in the respective samples. With respect to colony morphology no clear correlation between a chemotype and a morphospecies could be established, but M. aeruginosa, for example, was found to produce predominantly microcystins. In contrast, M. ichthyoblabe colonies were mostly negative for microcystins and instead produced anabaenopeptins. The number of peptides detected in a limited number of samples and the various combinations of peptides in individual Microcystis colonies highlights the immense metabolic potential and diversity of this genus.

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“…Optimal growth temperature, toxin production, predator avoidance, colony size, shape, and density are just a few of the characteristics that have been shown to vary by species, strain, and genotype [93,[102][103][104][105][106]. The rate of lake mixing and/or oscillations between mixing and thermal stratification are important factors determining the occurrence of cyanoHABs [81,107].…”

Section: Characteristics Of Bloom Forming Cyanobacteriamentioning

confidence: 99%

Cyanobacterial Toxins of the Laurentian Great Lakes, their Toxicological Effects, and Numerical Limits in Drinking Water

Miller

Beversdorf

Weirich

et al. 2017

Preprint

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Cyanobacteria are ubiquitous phototrophic bacteria that inhabit diverse environments across the planet. They dominate many eutrophic lakes impacted by excess nitrogen (N) and phosphorus (P) forming dense accumulations of biomass known as cyanobacterial harmful algal blooms or cyanoHABs. Their dominance in eutrophic lakes is attributed to a variety of unique adaptations including N and P concentrating mechanisms, N fixation, colony formation that inhibits predation, vertical movement via gas vesicles, and the production of toxic or otherwise bioactive molecules. While some of these molecules have been explored for their medicinal benefits, others are potent toxins harmful to humans, animals, and other wildlife known as cyanotoxins. In humans these cyanotoxins affect various tissues, including the liver, central and peripheral nervous system, kidneys, and reproductive organs among others. They induce acute effects at low doses in the parts-per-billion range and some are tumor promoters linked to chronic diseases such as liver and colorectal cancer. The occurrence of cyanoHABs and cyanotoxins in lakes presents challenges for maintaining safe recreational aquatic environments and the production of potable drinking water. CyanoHABs are a growing problem in the North American (Laurentian) Great Lakes basin. This review summarizes information on the occurrence of cyanoHABs in the Great Lakes, toxicological effects of cyanotoxins, and appropriate numerical limits on cyanotoxins in finished drinking water.

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Morphological variability of colonies of Microcystis morphospecies in culture.

Cited by 153 publications

References 9 publications

Taxonomy of cyanobacteria: a contribution to consensus approach

Taxonomy of cyanobacteria: a contribution to consensus approach

Diversity and distribution of Microcystis (Cyanobacteria) oligopeptide chemotypes from natural communities studied by single-colony mass spectrometry

Cyanobacterial Toxins of the Laurentian Great Lakes, their Toxicological Effects, and Numerical Limits in Drinking Water

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