A proposal for the unification of five species of the cyanobacterial genus Microcystis Kützing ex Lemmermann 1907 under the rules of the Bacteriological Code.

Otsuka, Shigeto; Suda, Shoichiro; Shibata, Toshiyuki; Oyaizu, Hiroshi; Matsumoto, Satoshi; Watanabe, Makoto M.

doi:10.1099/00207713-51-3-873

Cited by 166 publications

(129 citation statements)

References 24 publications

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“…However, the existence of large morphological plasticity within and low nucleic acid diversity among many morphologically defined species of Microcystis (as determined by 16S rDNA hybridization, which is normally used to define prokaryotic species of the Microcystis genus) has prompted their unification under M. aeruginosa (Kondo et al 2000; Otsuka et al 2001). Therefore, species classifications based on both molecular and morphological criteria are more robust.…”

Section: Resultsmentioning

confidence: 99%

Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa

White¹,

Kaul²,

Knoll³

et al. 2011

Limnology & Oceanography

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We asked if intraspecific variation within a population of the toxic, bloom-forming phytoplankter, Microcystis aeruginosa, leads to differential vulnerability to grazing by the invasive, filter-feeding zebra mussel (Dreissena polymorpha). We performed two series of laboratory feeding experiments in which D. polymorpha were presented with several different sympatric M. aeruginosa clones in a two-species mixture with the high-quality, nutritious alga, Ankistrodesmus falcatus. Mean selectivity across M. aeruginosa clones ranged from near zero (i.e., no feeding on M. aeruginosa) to near one (equal feeding on the two algal species), evidence of maximal variation in grazing vulnerability across twenty clones of M. aeruginosa-a species assumed to be largely 'inedible' to grazers-from the same population. This range of vulnerability is essentially equal to that typically measured across all phytoplankton species. Large intraspecific variation in grazing vulnerability, and its ecological consequences, could influence the promotion or control of noxious blooms of toxigenic cyanobacteria.

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Section: Resultsmentioning

confidence: 99%

Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa

White¹,

Kaul²,

Knoll³

et al. 2011

Limnology & Oceanography

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“…Interestingly, Lodders et al (2005) could provide the contrary, data on rRNA-ITS locus showed that this species sharing similar morphology differ on the genetic level. Similarly, Otsuka et al (2001) using the cpcBA intergenic spacer and 16S-23S internal transcribed spacer concluded that the six Microcystis morphospecies: M. aeruginosa, M. ichthyoblabe, M. novacekii, M. viridis, M. wesenbergii, M. flos-aquae and M. pseudofilamentosa, may possibly be unified into one species.…”

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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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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“…We investigated the CCM genes of 20 strains of M. aeruginosa (Kü tzing) (sensu Otsuka et al, 2001). Our analysis comprised 12 strains for which the full genome was sequenced in previous studies, including Microcystis NIES-843 (Kaneko et al, 2007), Microcystis PCC 7806 (Frangeul et al, 2008) and 10 Microcystis strains recently sequenced by Humbert et al (2013).…”

Section: Genome Sequencesmentioning

confidence: 99%

Genetic diversity of inorganic carbon uptake systems causes variation in CO2 response of the cyanobacterium Microcystis

et al. 2013

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Rising CO 2 levels may act as an important selective factor on the CO 2 -concentrating mechanism (CCM) of cyanobacteria. We investigated genetic diversity in the CCM of Microcystis aeruginosa, a species producing harmful cyanobacterial blooms in many lakes worldwide. All 20 investigated Microcystis strains contained complete genes for two CO 2 uptake systems, the ATP-dependent bicarbonate uptake system BCT1 and several carbonic anhydrases (CAs). However, 12 strains lacked either the high-flux bicarbonate transporter BicA or the high-affinity bicarbonate transporter SbtA. Both genes, bicA and sbtA, were located on the same operon, and the expression of this operon is most likely regulated by an additional LysR-type transcriptional regulator (CcmR2). Strains with only a small bicA fragment clustered together in the phylogenetic tree of sbtAB, and the bicA fragments were similar in strains isolated from different continents. This indicates that a common ancestor may first have lost most of its bicA gene and subsequently spread over the world. Growth experiments showed that strains with sbtA performed better at low inorganic carbon (C i ) conditions, whereas strains with bicA performed better at high C i conditions. This offers an alternative explanation of previous competition experiments, as our results reveal that the competition at low CO 2 levels was won by a specialist with only sbtA, whereas a generalist with both bicA and sbtA won at high CO 2 levels. Hence, genetic and phenotypic variation in C i uptake systems provide Microcystis with the potential for microevolutionary adaptation to changing CO 2 conditions, with a selective advantage for bicA-containing strains in a high-CO 2 world.

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A proposal for the unification of five species of the cyanobacterial genus Microcystis Kützing ex Lemmermann 1907 under the rules of the Bacteriological Code.

Cited by 166 publications

References 24 publications

Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa

Large variation in vulnerability to grazing within a population of the colonial phytoplankter, Microcystis aeruginosa

Taxonomy of cyanobacteria: a contribution to consensus approach

Genetic diversity of inorganic carbon uptake systems causes variation in CO2 response of the cyanobacterium Microcystis

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