Anoxygenic Phototrophic Bacteria of the Meromictic Lake Bol’shie Khruslomeny (Oleniy Island, Kandalaksha Gulf, Murmansk Oblast, Russia)

IF 1.3 4区生物学 Q4 MICROBIOLOGY

Microbiology Pub Date : 2023-11-28 DOI:10.1134/s0026261723602051

O. N. Lunina, D. S. Grouzdev, S. V. Patsaeva, A. A. Zhil’tsova, N. E. Suzina, E. D. Krasnova, D. A. Voronov, N. M. Kokryatskaya, E. F. Veslopolova, A. S. Savvichev

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Abstract—

The composition and structure of the anoxygenic phototrophic bacterial (APB) community in the water column of meromictic Lake Bol’shie Khruslomeny during winter were investigated. The community developed at the depth of 4.25 m, and its activity in the ice-cover period was very low (6.2 µmol C L^–1 day^–1). The water in the zone of highest development of phototrophic bacteria was of an unusual lemon-yellow color, probably due to the production and accumulation of polysulfides. The near-bottom water was also of lemon-yellow color and was resistant to oxidation by the air oxygen. In the zone of peak APB development the content of BChl d from green-colored green sulfur bacteria was considerably higher than that of BChl e from brown-colored green sulfur bacteria: 77 and 23%, respectively. The cultures of green and purple sulfur bacteria were isolated from lake water, and their physiological and genetic characteristics were determined. Two strains of green sulfur bacteria (brown-colored BrKhr17 and green-colored GrKhr17) contained gas vacuoles in their cells. Phylogenetically they were most closely related to the green-colored strain Chlorobium phaeovibrioides DSM 265 and were identified as new strains of the species Chlorobium phaeovibrioides.

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俄罗斯摩尔曼斯克州Kandalaksha湾Oleniy岛分生湖Bol’shie Khruslomeny的缺氧光养细菌

摘要/ abstract摘要:研究了博什湖冬季水体中无氧光养细菌(APB)群落的组成和结构。群落发育深度为4.25 m，冰盖期活度较低(6.2µmol C L-1 day-1)。光养细菌最高发育区的水呈不寻常的柠檬黄色，可能是由于多硫化物的产生和积累。接近底部的水也是柠檬黄色的，并且抵抗空气中的氧气氧化。在APB发育峰区，绿绿硫菌的BChl d含量显著高于棕绿硫菌的BChl e含量，分别为77%和23%。从湖水中分离出绿硫菌和紫硫菌，并对其生理和遗传特性进行了测定。两株绿色硫细菌(棕色的BrKhr17和绿色的GrKhr17)细胞中含有气体液泡。在系统发育上，它们与绿色菌株蓝弧菌DSM 265亲缘关系最近，被鉴定为绿弧菌属的新种。

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来源期刊

Microbiology 生物-微生物学

CiteScore

2.40

自引率

13.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Microbiology is an is an international peer reviewed journal that covers a wide range of problems in the areas of fundamental and applied microbiology. The journal publishes experimental and theoretical papers, reviews on modern trends in different fields of microbiological science, and short communications with descriptions of unusual observations. The journal welcomes manuscripts from all countries in the English or Russian language.