Identity, ecology and ecophysiology of planktic green algae dominating in ice-covered lakes on James Ross Island (northeastern Antarctic Peninsula)

We assessed the phylogenetic relationships, ecology and ecophysiological characteristics of the dominant planktic algae in ice-covered lakes on James Ross Island. Phylogenetic analyses of 18S rDNA together with analysis of ITS2 rDNA secondary structure and cell morphology revealed that the two strai...

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Bibliographic Details
Published in:Extremophiles
Main Authors: Nedbalová, L. (Linda), Mihál, M., Kvíderová, J. (Jana), Procházková, L., Řezanka, T. (Tomáš), Elster, J. (Josef)
Format: Article in Journal/Newspaper
Language:English
Published: 2017
Subjects:
Monoraphidium
lakes
Antarktica
Antarctic
Antarctic Peninsula
Ross Island
Antarc*
James Ross Island
Online Access:https://doi.org/10.1007/s00792-016-0894-y
http://hdl.handle.net/11104/0271210
Description
Summary:We assessed the phylogenetic relationships, ecology and ecophysiological characteristics of the dominant planktic algae in ice-covered lakes on James Ross Island. 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. 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 and unprecedently high content of polyunsaturated fatty acids, it makes these isolates interesting candidates for biotechnological applications.

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