Isolation and characterization of phototrophic purple nonsulfur bacteria from Chloroflexus and cyanobacterial mats in hot springs

被引:24
作者
Hisada, Takayoshi
Okamura, Keiko
Hiraishi, Akira
机构
[1] Toyohashi Univ Technol, Dept Ecol Engn, Toyohashi, Aichi 4418580, Japan
[2] TechnoSuruga Co Ltd, Shimizu Ku, Shizuoka 4240065, Japan
关键词
hot springs; purple nonsulfur bacteria; phototrophic bacteria; microbial mats;
D O I
10.1264/jsme2.22.405
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Chloroflexus and cyanobacterial mats developing at 50-65 degrees C in Nakanoyu and Nakabusa hot springs, Japan, were collected and cultivated phototrophically at 50 and 37 degrees C. Chloroflexus organisms grew when incubated at 50 degrees C, whereas the incubation at 37 degrees C resulted in the enrichment of pink- to brown-colored cultures, from which different species of phototrophic purple nonsulfur (PPNS) bacteria were isolated. The majority of the isolates grew at temperatures of up to 45 degrees C and optimally at around 40 degrees C. The high frequencies of the occurrence of PPNS bacteria in hot spring microbial mats suggest that these environments offer a favorable ecological niche for these bacteria.
引用
收藏
页码:405 / 411
页数:7
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