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CHARACTERIZATION OF TEN STRAINS OF FILAMENTOUS CYANOBACTERIA FROM THE SOUTH SHETLAND ISLANDS, MARITIME ANTARCTICA
Kovacik, Lubomir; Pereira, Antonio; Dusinsky, Roman et al.
20156th Symposium on Polar and Alpine Microbiology
 

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Keywords :
Antarctica; cyanobacteria; taxonomy; Diversity; South Shetlands Islands; coastal habitats
Abstract :
[en] The evolutionary relationships of ten Antarctic cyanobacterial strains of the order Oscillatoriales isolated from King George Island and Deception Island, South Shetland Islands were studied by a polyphasic approach. Phenotypic observations of the morphological features and genotypic analyses (16S rRNA and ITS sequences) were performed. Based on major phenotypic features, the strains were divided into four distinct morphotypes: Leptolyngbya borchgrevinkii (A), Leptolyngbya frigida (B), Phormidium autumnale (C) and Wilmottia murrayi (D). This morphological identification was in global agreement with the evolutionary relationships. According to the phylogenetic analysis, the ten strains were divided into two major clades, containing related strain sequences with Leptolyngbya morphotypes in one clade and with morphotypes corresponding to Phormidium, Wilmottia and Microcoleus spp. in the other clade. Each major clade was divided into two sub-clades. For the first time, the 16S rRNA gene sequence of a strain corresponding to the Leptolyngbya borchgrevinkii morphotype (A) was determined, on the basis of strain KOVACIK-ANT 1990/4. The closest sequence to our morphotype A is the clone Fr252 isolated from microbial mat of Antarctic Lake Fryxell. Morphotype B is closest to sequences assigned to Leptolyngbya frigida isolated from microbial mats of lakes in continental East Antarctica. Morphotype C belongs to a cluster including strains with morphotypes corresponding to Phormidium autumnale from Antarctica, but also from Europe. Morphotype D is grouped with sequences of the morphotype assigned to Wilmottia murrayi isolated from Antarctica.
Research center :
CIP - Centre d'Ingénierie des Protéines - ULiège
Disciplines :
Environmental sciences & ecology
Microbiology
Author, co-author :
Kovacik, Lubomir
Pereira, Antonio
Dusinsky, Roman
Jancusa, Miroslava
Wilmotte, Annick  ;  Université de Liège > Département des sciences de la vie > Physiologie et génétique bactériennes
Language :
English
Title :
CHARACTERIZATION OF TEN STRAINS OF FILAMENTOUS CYANOBACTERIA FROM THE SOUTH SHETLAND ISLANDS, MARITIME ANTARCTICA
Publication date :
07 September 2015
Number of pages :
A0
Event name :
6th Symposium on Polar and Alpine Microbiology
Event organizer :
University of Ceske Budejovice, Center for Polar Ecology
Event place :
Ceske Budejovice, Czechia
Event date :
6 septembre au 10 septembre 2015
Audience :
International
Name of the research project :
CCAMBIO, BIPOLES,
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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since 12 January 2016

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