Desulfocapsa

Abstract: We sequenced the metagenome of an anoxygenic photosynthetic consortium originating from pond water and reconstructed four metagenome-assembled genomes. These genomes include Desulfocapsa, Paludibacter, Lamprocystis, and Rhodocyclaceae representatives and indicate the presence of genes for dissimilatory sulfate reduction and oxidation of reduced sulfur compounds.

Abstract: Bacterial communities from the sulfide containing curative well waters of Harkany Spa (Hungary) were investigated by cultivation independent molecular cloning and Denaturing Gradient Gel Electrophoresis (DGGE) methods between 2006 and 2008. The DGGE profiles of the bacterial communities originated from the wells of lukewarm waters showed seasonal similarities and were highly different from the thermal well. From the four clone libraries 22 different eubacterial species or genera were identified by sequence analysis. The majority of the clones of the lukewarm waters belonged to unidentified Epsilon-proteobacteria, Desulfocapsa sp. and Thiothrix spp., while the dominant clones of the thermal water were affiliated with the genus Denitratisoma sp. Most of the identified species and genera were related to bacteria with obligate or facultative chemolithotrophic sulfur metabolism, so the microbes of the curative waters may participate in the sulfur-cycle of the wells.

Abstract: The composition of bacterial communities associated with waters of one thermal and three sulfurous lukewarm wells of cavernous limestone aquifers in the Southwestern part of Hungary was studied in 2007 and 2008 by microscopy and culture-independent clone library analysis targeting the 16S rRNA gene. The presence of Thiothrix-like filamentous bacteria was observed by microscopy in the lukewarm samples. From the clone libraries, a high proportion of phylotypes belonging to Proteobacteria (Rhodobacter, Sphingopyxis, Phenylobacterium, Ochrobactrum, Methylobacterium, Sulfuritalea, Thiobacillus, Limnobacter, Acidovorax, Xanthomonadaceae, Thiothrix, Lysobacter, Pseudoxanthomonas, Desulfopila, Desulfocapsa, Desulforhopalus, Sulfuricurvum, Sulfurimonas, Sulfurospirillum) was revealed. In addition, phylotypes of Acidobacteria, Chloroflexi, Sphingobacteria, Clostridia, Aquificae, Deferribacteres and Chlorobi were detected. On the basis of their habitat preference 21 out of a total of 39 different phylotypes represen...