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- W2549994080 abstract "Aims; The aim of this study was to investigate and compare, by 16S rDNA clone library analysis, the community structure of members of the Chloroflexaceae Family from four hypersaline microbial mats from different continents (Chiprana, Spain, Europe; Abu Dhabi, United Arab Emirates, Asia; Guerrero Negro, Mexico, North America; and a mat originating from Chiprana but kept for years in a laboratory based mesocosm system). Methods; The Chloroflexi phylum, which accommodates, among others, filamentous anoxygenic phototrophic bacteria of the Family Chloroflexaceae, roots deeply in the tree of life. Although only few isolates of this Family have been characterized to date, a high diversity of related 16S rDNA sequences has been found in clone libraries of hot spring and hypersaline microbial mats. As the characterized isolates appear metabolically and therefore also likely functionally different, closely related 16S rRNA gene sequences from environmental samples may reflect the occurrence of related functional groups in their natural habitat. Using previously designed specific Chloroflexaceae 16S primers, three clone libraries were constructed from Chiprana, Abu-Dhabi and the Mesocosm mats and phylogenetically compared with the previously described North American one. Results; we observed a number of unique environmental sequences ( homology) in each mat; however, in all four mats clone libraries, the majority of retrieved sequences were most closely related to the previously isolated species ‘Candidatus Chlorothrix halophila’ Main Conclusions: it is concluded that both a relatively high and endemic local diversity is present and that ‘Candidatus Chlorothrix halophila’, a bacteriochlorophyll c-producing species, and/or close relatives are pandemic and dominates the Chloroflexaceae community in hypersaline mats. We hope that this initial comparative study will stimulate further investigations on the biogeography, physiology and phylogeny of this ancient and metabolically diverse group of Chloroflexaceae." @default.
- W2549994080 created "2016-11-30" @default.
- W2549994080 creator A5014465638 @default.
- W2549994080 date "2009-03-12" @default.
- W2549994080 modified "2023-09-28" @default.
- W2549994080 title "Phototrophic Chloroflexus-like bacteria and their role in hypersaline microbial mats" @default.
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