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Identity, ecology and ecophysiology of planktic green algae dominating in ice-covered lakes on James Ross Island (northeastern Antarctic Peninsula)
L. Nedbalová, M. Mihál, J. Kvíderová, L. Procházková, T. Řezanka, J. Elster,
Language English Country Germany
Document type Journal Article
NLK
ProQuest Central
from 2002-01-01 to 1 year ago
Medline Complete (EBSCOhost)
from 2000-02-01 to 1 year ago
Health & Medicine (ProQuest)
from 2002-01-01 to 1 year ago
- MeSH
- Biodiversity * MeSH
- Chlorophyta classification genetics metabolism MeSH
- Phytoplankton classification genetics isolation & purification metabolism MeSH
- Adaptation, Physiological MeSH
- Lakes MeSH
- Ice Cover * MeSH
- Fatty Acids, Unsaturated metabolism MeSH
- RNA, Ribosomal, 18S genetics MeSH
- Publication type
- Journal Article MeSH
- Geographicals
- Antarctic Regions MeSH
The aim of this study was to assess the phylogenetic relationships, ecology and ecophysiological characteristics of the dominant planktic algae in ice-covered lakes on James Ross Island (northeastern Antarctic Peninsula). Phylogenetic analyses of 18S rDNA together with analysis of ITS2 rDNA secondary structure and cell morphology revealed that the two strains belong to one species of the genus Monoraphidium (Chlorophyta, Sphaeropleales, Selenastraceae) that should be described as new in future. Immotile green algae are thus apparently capable to become the dominant primary producer in the extreme environment of Antarctic lakes with extensive ice-cover. The strains grew in a wide temperature range, but the growth was inhibited at temperatures above 20 °C, indicating their adaptation to low temperature. Preferences for low irradiances reflected the light conditions in their original habitat. Together with relatively high growth rates (0.4-0.5 day(-1)) and unprecedently high content of polyunsaturated fatty acids (PUFA, more than 70% of total fatty acids), it makes these isolates interesting candidates for biotechnological applications.
References provided by Crossref.org
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- $a Nedbalová, Linda $u Department of Ecology, Faculty of Science, Charles University in Prague, Viničná 7, 128 44, Prague, Czech Republic. lindane@natur.cuni.cz. Centre for Phycology, Institute of Botany, CAS, Dukelská 135, 379 82, Třeboň, Czech Republic. lindane@natur.cuni.cz.
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- $a Identity, ecology and ecophysiology of planktic green algae dominating in ice-covered lakes on James Ross Island (northeastern Antarctic Peninsula) / $c L. Nedbalová, M. Mihál, J. Kvíderová, L. Procházková, T. Řezanka, J. Elster,
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- $a The aim of this study was to assess the phylogenetic relationships, ecology and ecophysiological characteristics of the dominant planktic algae in ice-covered lakes on James Ross Island (northeastern Antarctic Peninsula). Phylogenetic analyses of 18S rDNA together with analysis of ITS2 rDNA secondary structure and cell morphology revealed that the two strains belong to one species of the genus Monoraphidium (Chlorophyta, Sphaeropleales, Selenastraceae) that should be described as new in future. Immotile green algae are thus apparently capable to become the dominant primary producer in the extreme environment of Antarctic lakes with extensive ice-cover. The strains grew in a wide temperature range, but the growth was inhibited at temperatures above 20 °C, indicating their adaptation to low temperature. Preferences for low irradiances reflected the light conditions in their original habitat. Together with relatively high growth rates (0.4-0.5 day(-1)) and unprecedently high content of polyunsaturated fatty acids (PUFA, more than 70% of total fatty acids), it makes these isolates interesting candidates for biotechnological applications.
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- $a Mihál, Martin $u Department of Ecology, Faculty of Science, Charles University in Prague, Viničná 7, 128 44, Prague, Czech Republic.
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- $a Kvíderová, Jana $u Centre for Phycology, Institute of Botany, CAS, Dukelská 135, 379 82, Třeboň, Czech Republic. Centre for Polar Ecology, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic.
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- $a Elster, Josef $u Centre for Phycology, Institute of Botany, CAS, Dukelská 135, 379 82, Třeboň, Czech Republic. Centre for Polar Ecology, Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05, České Budějovice, Czech Republic.
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