Philippe Normand

..nov. (type strain RSA19T = ATCC BAA-95T = LMG 19080T) and Paenibacillus odorifer sp. nov. (type strain TOD45T = ATCC BAA-93T = LMG 19079T) are proposed...

..2000). We hereby formally describe the family 'Geodermatophilaceae' which includes the recently described genus Modestobacter. The type genus of the family is Geodermatophilus...

..The results support the idea that major genome expansions as well as reductions can occur in facultative symbiotic soil bacteria as they respond to new environments in the context of their symbioses...

..Proteins in the core secretome may be involved in the actinorhizal symbiosis...

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..This was observed only in the mine spoils and is probably a consequence of the extreme environmental conditions. Carbon amendment in the agricultural soil led to an increase in Firmicutes, mainly Bacillus sp...

..glutinosa, resulting in a higher number of nodules per root. Its role could thus be to permit binding of microbial cells to root hairs and help symbiosis to occur under conditions of low Frankia cell counts such as in pioneer situations...

..Finally, comparison with rhizobia transcriptome suggested that F. alni is metabolically more active in symbiosis than rhizobia...

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..The generated chromosome is circular, with a length of 5.57 Mb and a G+C content of 74.13%, containing 5,445 protein-coding genes, 48 tRNAs, and 3 ribosomal operons...

..The birth of the genus Azospirillum approximately coincided with the emergence of vascular plants on land...

..The complete genomic sequence of this strain contains 6,194,645 bp, an average G+C content of 68.37%, and no plasmids. We also identified several protein-coding genes to which N. cyriacigeorgica's virulence can potentially be attributed...

..So, in contrast with many studies showing the abolition or a large reduction of the frequency of phase variation in recA mutants, this study describes an enhancement of phase variation in the absence of a functional recA...

..They presumably originate from deep faults in the bedrock cavity containing the lake in which episodes of seismotectonic activity would release debris along with microbial cells...

..These results suggest that neocaledonian soil bacteria are particularly well adapted to nickel...

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..An analysis of complete 16S rRNA gene sequences demonstrated that the two strains analyzed in detail are most closely related to actinobacteria in the Thermomonosporaceae and the Micromonosporaceae...

..As part of a polyphasic taxonomic scheme, this straightforward approach is proposed to improve species definition, especially for application in the rapid screening necessary for large numbers of clinical or environmental isolates...

..Thus, the SodF protein induced in Frankia by root exudates is an iron-containing enzyme similar to the one present in the nodules...

..Mutational analyses indicated that these unique rhizobia use an alternative pathway to initiate symbioses, where a purine derivative may play a key role in triggering nodule formation...

..Combined with classical methods of physico-chemistry and microbiology, these endeavours should provide us with an integrated view of how micro-organisms adapt to particular ecological niches and participate in the dynamics of ecosystems...

..These results support the hypothesis that strain CcI3 is becoming a symbiotic specialist and the other two facultative symbiotic strains are maintaining their capacity to exist as free-living soil dwellers...