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. 2005 Feb;71(2):1097-100.
doi: 10.1128/AEM.71.2.1097-1100.2005.

Genetic diversity of Cylindrospermopsis strains (cyanobacteria) isolated from four continents

Muriel Gugger  1 , Renato Molica, Brigitte Le Berre, Philippe Dufour, Cécile Bernard, Jean-François Humbert
Affiliations

Genetic diversity of Cylindrospermopsis strains (cyanobacteria) isolated from four continents

Muriel Gugger et al. Appl Environ Microbiol. 2005 Feb.

Abstract

The genetic diversity of Cylindrospermopsis strains (cyanobacteria) was examined using mainly the 16S-23S internally transcribed spacer (ITS1) sequences. Strains were grouped in three clusters: (i) America, (ii) Europe, and (iii) Africa and Australia. These results suggested a recent spread of Cylindrospermopsis across the American and European continents from restricted warm refuge areas instead of exchanges between continents. On the other hand, they also suggested a recent colonization of Australia by African strains.

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Figures

FIG. 1.
FIG. 1.
Alignment of the consensus sequences obtained for Cylindrospermopsis and Raphidiopsis ITS1-L from each continent. Europe: ITS-L from six Cylindrospermopsis strains; America: ITS-L from six Cylindrospermopsis/Raphidiopsis strains; Australia: ITS-L from three Cylindrospermopsis strains; Africa: ITS-L from three Cylindrospermopsis strains.
FIG. 2.
FIG. 2.
Maximum-likelihood unrooted tree based on Cylindrospermopsis and Raphidiopsis ITS1-L sequences. Neighbor-joining, maximum-parsimony, and maximum-likelihood bootstrap values >70%, respectively, are given at the nodes (500 bootstrap resampling).
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