Rhodobaca barguzinensis sp nov., a new alkaliphilic purple nonsulfur bacterium isolated from a soda lake of the Barguzin Valley (Buryat Republic, Eastern Siberia)

被引:37
作者
Boldareva, E. N. [1 ]
Akimov, V. N. [2 ]
Boychenko, V. A. [3 ]
Stadnichuk, I. N. [4 ]
Moskalenko, A. A. [3 ]
Makhneva, Z. K. [3 ]
Gorlenko, V. M. [1 ]
机构
[1] Russian Acad Sci, Winogradsky Inst Microbiol, Moscow 117312, Russia
[2] Russian Acad Sci, Skryabin Inst Biochem & Physiol Microorg, Pushchino 142290, Moscow Oblast, Russia
[3] Russian Acad Sci, Inst Fundamental Problems Biol, Pushchino 142290, Moscow Oblast, Russia
[4] Russian Acad Sci, Bach Inst Biochem, Moscow, Russia
基金
俄罗斯基础研究基金会;
关键词
soda lakes; extremophiles; alkaliphiles; purple nonsulfur bacteria; Rhodobaca;
D O I
10.1134/S0026261708020148
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
A novel strain, alga-05, of alkaliphilic purple nonsulfur bacteria was isolated from sediments of a small saline (60 g/l) soda lake near Lake Algin (Barguzin Valley, Buryat Republic, Russia). These bacteria contain bacteriochlorophyll a and carotenoids of the alternative spirilloxanthin group with predominating demethylspheroidenone. They are facultative anaerobes; their photosynthetic structures are of the vesicular type and arranged along the cell periphery. Growth of this strain is possible in a salinity range of 5-80 g/l NaCl, with an optimum at 20 g/l NaCl. Best growth occurred at 20-35 degrees C. Analysis of the 16S rRNA gene sequences demonstrated that the studied isolate is closely related to the alkaliphilic purple nonsulfur bacterium Rhodobaca bogoriensis (99% similarity) isolated from soda lakes of the African Rift Zone. According to the results of DNA-DNA hybridization, strain alga-05 has a 52% similarity with the type species of the genus Rhodobaca. On the basis of the obtained genotypic data and some phenotypic properties (dwelling in a hypersaline soda lake of Siberia, moderate halophily, ability to grow at relatively low temperatures, etc.), the isolated strain of purple bacteria was described as a new species of the genus Rhodobaca, Rca. barguzinensis sp. nov.
引用
收藏
页码:206 / 218
页数:13
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