Roseospira visakhapatnamensis sp. nov. and Roseospira goensis sp. nov.

Chakravarthy, S.K.; Srinivas, T. N. R.; Kumar, P. Anil; Sasikala, Ch.; Ramana, Ch. V.

doi:10.1099/ijs.0.65105-0

Cited by 27 publications

(13 citation statements)

References 7 publications

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“…Due to the oxygen reduction at the cathode pH can increase to alkaline values in the cathodic chamber [47], thus influencing the microbial community composition. This is consistent with the fact that the most abundant PNS bacteria identified in our SCMFC belonged to the genera Caenispirillum and Roseospira, whose members are often described as halophilic and/or moderately alkaliphilic [48][49][50]. The microbial diversity in the cathodic populations was higher within the order Bacteroidales, with 79.3% of the sequences belonging to Porphyromonadaceae family (59.4% of the sequences belonged to Paludibacter genus) (Fig.…”

Section: Figuresupporting

confidence: 71%

Anodic and cathodic microbial communities in single chamber microbial fuel cells

et al. 2015

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Section: Figuresupporting

confidence: 71%

Anodic and cathodic microbial communities in single chamber microbial fuel cells

et al. 2015

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“…In addition, OTUs have been found in glaciers that corresponded with typical marine microorganisms such as Pelagibacter (Giovannoni, 2017), Polaribacter (Staley and Gosink, 1999), and Roseospira (Kalyan Chakravarthy et al, 2007) or vice versa, OTUs of terrestrial microorganisms as Acidisoma (Belova et al, 2009) or Propionibacterium (Koussémon et al, 2001) were found in seawater samples.…”

Section: Microbial Community Compositionmentioning

confidence: 99%

Microbial Communities in Coastal Glaciers and Tidewater Tongues of Svalbard Archipelago, Norway

et al. 2019

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Global warming is having a great impact on the Arctic region, due to the change of air temperature and precipitation. As a consequence, the glacial ice melts and englacial materials are being transported into the ocean. These substances can constitute a source of nutrients in food webs or, on the contrary, a source of contaminants. In this research seven marine Svalbard glaciers and their tidewater tongues were focused. This survey provides a first attempt comparing microbial communities from coastal and tidewater glaciers that reveal a hitherto unknown microbial diversity. A wider diversity was found in glaciers than in seawater samples. Glacier microorganisms mainly corresponded to the phylum Proteobacteria (48.8%), Bacteroidetes (29.1%) and Cyanobacteria (16.3%) (Figure 3A). Seawater microorganisms belonged to Bacteroidetes (40.3%), Actinobacteria (31.7%) and Proteobacteria (25.4%). Other phyla found such as Firmicutes, Thermi, Gemmatimonadetes, Verrucomicrobia, Nitrospirae, Chloroflexi, Planctomycetes, and Chlamydiae were less abundant. The distribution of microbial communities was affected in different extent by the concentration of nutrients (nitrogen nutrients, dissolved organic carbon and soluble reactive phosphorus) and by environmental parameters such as salinity. Nevertheless, the environmental variables did not influence in the distribution of the microbial communities as much as the concentration of nutrients did. Our results demonstrate an interchange between glacier and coastal microbial populations as well as the presence of some indicator species (i.e., Hymenobacter) as possible sentinels for bacterial transport between glaciers and their downstream seawaters. The consequence of this process could be the alteration of the water composition of the fiords producing serious consequences throughout the marine ecosystem and in the cycling of globally important elements.

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“…Rubrivivax benzoatilyticus JA2 (ATCC BBA-35) was grown photoheterotrophically (anaerobic, 30 ºC; light 2,400 lux) in a mineral medium 25 supplemented with malate (22 mM) as carbon source and ammonium chloride (7 mM) as nitrogen source in fully filled screw cap test tubes (10x100 mm)/reagent bottles (250 ml) at pH 6.8 and a temperature of 30 ±1 o C.…”

Section: Organism and Growth Conditionsmentioning

confidence: 99%

Integrated Metabolomic and Proteomic Analysis Reveals Systemic Responses of Rubrivivax benzoatilyticus JA2 to Aniline Stress

Mujahid

Prasuna

Sasikala³

et al. 2014

J. Proteome Res.

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Aromatic amines are widely distributed in the environment and are major environmental pollutants. Although degradation of aromatic amines is well studied in bacteria, physiological adaptations and stress response to these toxic compounds is not yet fully understood. In the present study, systemic responses of Rubrivivax benzoatilyticus JA2 to aniline stress were deciphered using metabolite and iTRAQ-labeled protein profiling. Strain JA2 tolerated high concentrations of aniline (30 mM) with trace amounts of aniline being transformed to acetanilide. GC-MS metabolite profiling revealed aniline stress phenotype wherein amino acid, carbohydrate, fatty acid, nitrogen metabolisms, and TCA (tricarboxylic acid cycle) were modulated. Strain JA2 responded to aniline by remodeling the proteome, and cellular functions, such as signaling, transcription, translation, stress tolerance, transport and carbohydrate metabolism, were highly modulated. Key adaptive responses, such as transcription/translational changes, molecular chaperones to control protein folding, and efflux pumps implicated in solvent extrusion, were induced in response to aniline stress. Proteo-metabolomics indicated extensive rewiring of metabolism to aniline. TCA cycle and amino acid catabolism were down-regulated while gluconeogenesis and pentose phosphate pathways were up-regulated, leading to the synthesis of extracellular polymeric substances. Furthermore, increased saturated fatty acid ratios in membranes due to aniline stress suggest membrane adaptation. The present study thus indicates that strain JA2 employs multilayered responses: stress response, toxic compound tolerance, energy conservation, and metabolic rearrangements to aniline.

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Roseospira visakhapatnamensis sp. nov. and Roseospira goensis sp. nov.

Cited by 27 publications

References 7 publications

Anodic and cathodic microbial communities in single chamber microbial fuel cells

Anodic and cathodic microbial communities in single chamber microbial fuel cells

Microbial Communities in Coastal Glaciers and Tidewater Tongues of Svalbard Archipelago, Norway

Integrated Metabolomic and Proteomic Analysis Reveals Systemic Responses of Rubrivivax benzoatilyticus JA2 to Aniline Stress

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