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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,
Jazyk angličtina Země Německo
Typ dokumentu časopisecké články
NLK
ProQuest Central
od 2002-01-01 do Před 1 rokem
Medline Complete (EBSCOhost)
od 2000-02-01 do Před 1 rokem
Health & Medicine (ProQuest)
od 2002-01-01 do Před 1 rokem
- MeSH
- biodiverzita * MeSH
- Chlorophyta klasifikace genetika metabolismus MeSH
- fytoplankton klasifikace genetika izolace a purifikace metabolismus MeSH
- fyziologická adaptace MeSH
- jezera MeSH
- ledový příkrov * MeSH
- nenasycené mastné kyseliny metabolismus MeSH
- RNA ribozomální 18S genetika MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- Antarktida 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.
Citace poskytuje 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 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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