Novel acsF Gene Primers Revealed a Diverse Phototrophic Bacterial Population, Including Gemmatimonadetes, in Lake Taihu (China)

0467196 - MBÚ 2017 RIV US eng J - Journal Article
Huang, Y. - Zeng, Y. - Lu, H. - Feng, H. - Zeng, Yo. - Koblížek, Michal
Novel acsF Gene Primers Revealed a Diverse Phototrophic Bacterial Population, Including Gemmatimonadetes, in Lake Taihu (China).
Applied and Environmental Microbiology. Roč. 82, č. 18 (2016), s. 5587-5594. ISSN 0099-2240. E-ISSN 1098-5336
R&D Projects: GA ČR GA13-11281S; GA MŠMT(CZ) LO1416
Institutional support: RVO:61388971
Keywords : AEROBIC ANOXYGENIC PHOTOTROPHS * MICROBIAL COMMUNITIES * OPERONS
Subject RIV: EA - Cell Biology
Impact factor: 3.807, year: 2016

Anoxygenic phototrophs represent an environmentally important and phylogenetically diverse group of organisms. They harvest light using bacteriochlorophyll-containing reaction centers. Recently, a novel phototrophic bacterium, Gemmatimonas phototrophica, belonging to a rarely studied phylum, Gemmatimonadetes, was isolated from a freshwater lake in the Gobi Desert. To obtain more information about the environmental distribution of phototrophic Gemmatimonadetes, we collected microbial samples from the water column, upper sediment, and deeper anoxic sediment of Lake Taihu, China. MiSeq sequencing of the 16S rRNA, pufM, and bchY genes was carried out to assess the diversity of local phototrophic communities. In addition, we designed new degenerate primers of aerobic cyclase gene acsF, which serves as a convenient marker for both phototrophic Gemmatimonadetes and phototrophic Proteobacteria. Our results showed that most of the phototrophic species in Lake Taihu belong to Alpha- and Betaproteobacteria. Sequences of green sulfur and green nonsulfur bacteria (phototrophic Chlorobi and Chloroflexi, respectively) were found in the sediment. Using the newly designed primers, we identified a diverse community of phototrophic Gemmatimonadetes forming 30 operational taxonomic units. These species represented 10.5 and 17.3% of the acsF reads in the upper semiaerobic sediment and anoxic sediment, whereas their abundance in the water column was <1%.
Permanent Link: http://hdl.handle.net/11104/0265354