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Applied and Environmental Microbiology, February 2005, p. 1097-1100, Vol. 71, No. 2
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.2.1097-1100.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Genetic Diversity of Cylindrospermopsis Strains (Cyanobacteria) Isolated from Four Continents{dagger}

Muriel Gugger,1,2,{ddagger} Renato Molica,1,3,{ddagger} Brigitte Le Berre,1 Philippe Dufour,4 Cécile Bernard,2 and Jean-François Humbert1*

INRA,1 IRD UR098-INRA, UMR CARRTEL, Thonon,4 MNHN, Unité Ecosystèmes et Interactions Toxiques (USM0505), Paris, France,2 Instituto Tecnologico do Estado de Pernambuco, Recife, Brazil3

Received 12 March 2004/ Accepted 18 September 2004

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.

* Corresponding author. Mailing address: INRA, UMR CARRTEL,BP 511, 74203 Thonon Cedex, France. Phone: 33.4.50.26.78.09. Fax: 33.4.50.26.07.60. E-mail: humbert{at}thonon.inra.fr.

FOOTNOTES

{dagger} This work is a contribution of the French Institute for Research and Development (IRD/UR098).

{ddagger} M. Gugger and R. Molica contributed equally to this work.

Applied and Environmental Microbiology, February 2005, p. 1097-1100, Vol. 71, No. 2
0099-2240/05/$08.00+0     doi:10.1128/AEM.71.2.1097-1100.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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