Seasonal Variations in the Structure of an Anoxygenic Phototrophic Bacterial Community from the Meromictic Lake Trekhtsvetnoe (Kandalaksha Bay, White Sea)


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Аннотация

The community of anoxygenic phototrophic bacteria (APB) from the water column of the meromictic Lake Trekhtsvetnoe (Kandalaksha Bay, White Sea, Russia) was studied in March 2012 and 2013 and in September 2013 and 2014. The community structure below the chemocline was shown to restore during three years after partial mixing resulting from seawater admixture into the lake in autumn 2011; a dense layer (at least 108 cells mL–1) of green-colored (g/c) sulfur bacteria (GSB) was formed. During winter, development of low numbers of brown colored (b/c) GSB was observed in the upper layer of green water. During summer seasons, b/c GSB were found to be located in the oxic zone above the green water layer, which was unusual for these organisms. The APB community was found to contain purple bacteria. Four APB strains were isolated from the upper part of the sulfide zone. The b/c and g/c GSB strains were phylogenetically close to each other and to the type species Chlorobium phaeovibrioides DSM 265 (99% similarity gene sequences). One strain of purple bacteria was phylogenetically related to the brackish sulfur bacteria Thiocapsa marina, while the other was related to freshwater bacteria Rhodopseudomonas palustris. The strains of sulfur bacteria were phylogenetically close to the chemocline bacteria from the stratified Lake Kislo-Sladkoe, also located in the coastal zone of the Kandalaksha Bay, White Sea.

Об авторах

O. Lunina

Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences

Автор, ответственный за переписку.
Email: onlun@yandex.ru
Россия, Moscow, 119071

A. Savvichev

Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

V. Babenko

Federal Research and Clinical Center of Physical-Chemical Medicine, Federal Medical Biological Agency

Email: onlun@yandex.ru
Россия, Moscow, 119435

D. Boldyreva

Federal Research and Clinical Center of Physical-Chemical Medicine, Federal Medical Biological Agency

Email: onlun@yandex.ru
Россия, Moscow, 119435

B. Kuznetsov

Institute of Bioengineering, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

T. Kolganova

Institute of Bioengineering, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

E. Krasnova

Pertsov White Sea Biological Station, Moscow State University

Email: onlun@yandex.ru
Россия, Moscow

N. Kokryatskaya

Laverov Federal Research Center for Comprehensive Arctic Studies, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Arkhangelsk, 163000

E. Veslopolova

Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

D. Voronov

Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences; Belozersky Institute of Physico-Chemical Biology, Moscow State University

Email: onlun@yandex.ru
Россия, Moscow, 127994; Moscow, 119992

N. Demidenko

Zubov State Oceanography Institute

Email: onlun@yandex.ru
Россия, Moscow, 119034

M. Letarova

Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

A. Letarov

Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

V. Gorlenko

Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences

Email: onlun@yandex.ru
Россия, Moscow, 119071

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