PMID- 22294982 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20121002 LR - 20220129 IS - 1664-302X (Electronic) IS - 1664-302X (Linking) VI - 2 DP - 2011 TI - Similar diversity of alphaproteobacteria and nitrogenase gene amplicons on two related sphagnum mosses. PG - 275 LID - 10.3389/fmicb.2011.00275 [doi] LID - 275 AB - Sphagnum mosses represent a main vegetation component in ombrotrophic wetlands. They harbor a specific and diverse microbial community with essential functions for the host. To understand the extend of host specificity and impact of environment, Sphagnum fallax and Sphagnum angustifolium, two phylogenetically closely related species, which show distinct habitat preference with respect to the nutrient level, were analyzed by a multifaceted approach. Microbial fingerprints obtained by PCR-single-strand conformation polymorphism of 16S rRNA and nitrogenase-encoding (nifH) genes were highly similar for both Sphagnum species. Similarity was confirmed for colonization patterns obtained by fluorescence in situ hybridization (FISH) coupled with confocal laser scanning microscopy (CLSM): Alphaproteobacteria were the main colonizers inside the hyaline cells of Sphagnum leaves. A deeper survey of Alphaproteobacteria by 16S rRNA gene amplicon sequencing reveals a high diversity with Acidocella, Acidisphaera, Rhodopila, and Phenylobacterium as major genera for both mosses. Nitrogen fixation is an important function of Sphagnum-associated bacteria, which is fulfilled by microbial communities of Sphagna in a similar way. NifH libraries of Sphagnum-associated microbial communities were characterized by high diversity and abundance of Alphaproteobacteria but contained also diverse amplicons of other taxa, e.g., Cyanobacteria and Deltaproteobacteria. Statistically significant differences between the microbial communities of both Sphagnum species could not be discovered in any of the experimental approach. Our results show that the same close relationship, which exists between the physical, morphological, and chemical characteristics of Sphagnum mosses and the ecology and function of bog ecosystems, also connects moss plantlets with their associated bacterial communities. FAU - Bragina, Anastasia AU - Bragina A AD - Institute of Environmental Biotechnology, Graz University of Technology Graz, Austria. FAU - Maier, Stefanie AU - Maier S FAU - Berg, Christian AU - Berg C FAU - Muller, Henry AU - Muller H FAU - Chobot, Vladimir AU - Chobot V FAU - Hadacek, Franz AU - Hadacek F FAU - Berg, Gabriele AU - Berg G LA - eng GR - I 183/FWF_/Austrian Science Fund FWF/Austria PT - Journal Article DEP - 20120110 PL - Switzerland TA - Front Microbiol JT - Frontiers in microbiology JID - 101548977 PMC - PMC3261640 OTO - NOTNLM OT - Alphaproteobacteria OT - FISH-CLSM OT - SSCP fingerprints OT - Sphagnum angustifolium OT - Sphagnum fallax OT - amplicon library OT - nitrogenase EDAT- 2012/02/02 06:00 MHDA- 2012/02/02 06:01 PMCR- 2012/01/10 CRDT- 2012/02/02 06:00 PHST- 2011/11/11 00:00 [received] PHST- 2011/12/22 00:00 [accepted] PHST- 2012/02/02 06:00 [entrez] PHST- 2012/02/02 06:00 [pubmed] PHST- 2012/02/02 06:01 [medline] PHST- 2012/01/10 00:00 [pmc-release] AID - 10.3389/fmicb.2011.00275 [doi] PST - epublish SO - Front Microbiol. 2012 Jan 10;2:275. doi: 10.3389/fmicb.2011.00275. eCollection 2011.