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  • 1
    Electronic Resource
    Electronic Resource
    Effect of pesticides on hydrogen metabolism of Rhodobacter sphaeroides and Rhodopseudomonas palustris (1996)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 19 (1996), S. 0 
    Details
    ISSN: 1574-6941
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract: The present study reports the effect of 2,4-d, quinalphos, monocrotophos, captan and carbendazim on the hydrogen metabolism (nitrogenase, photoproduction of hydrogen and hydrogenase activities) of two purple non-sulfur bacteria isolated from paddy soils. In general, the pesticides were found to be inhibitory to both nitrogenase and hydrogen photoproduction activities of both the organisms, and their effect on hydrogenase-mediated reactions varied with the pesticides used and the organisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6941.1996.tb00192.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Photoproduction of hydrogen, nitrogenase and hydrogenase activities of free and immobilized whole cells of Rhodobacter sphaeroides O.U. 001 (1990)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 72 (1990), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract Photoproduction of hydrogen, nitrogenase activity (acetylene reduction) and hydrogenase activity (methylene blue dye reduction) were studied in free and alginate immobilized whole cells of a purple non-sulfur photosynthetic bacterium Rhodobacter sphaeroides O.U. 001. Four-fold increase in hydrogen production, two-fold increase in nitrogenase activity and 1.2-fold increase in the hydrogenase activity were observed in immobilized cells compared to free cells. Effect of various inhibitors (CO and C2H2) and electron donor (H2) on the above three functions by free and immobilized cells has also been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1990.tb03855.x
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  • 3
    Electronic Resource
    Electronic Resource
    Nitrogen fixation by Rhodopseudomonas palustris OU 11 with aromatic compounds as carbon source/electron donors (1994)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 122 (1994), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract A purple non-sulfur anoxygenic phototrophic bacterium, Rhodopseudomonas palustris (ATCC 51186; DSM 7375), grew fixing N2 using aromatic compounds as the sole carbon source/electron donor. Benzoate, cinnamate and benzyl alcohol were used as electron donors for N2 fixation, while aniline and nitrobenzene supported poor growth under N2 atmosphere (in the absence of any other combined nitrogen in the medium) but did serve as sole carbon source/e− donor in the presence of ammonium chloride as nitrogen source.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1994.tb07146.x
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  • 4
    Electronic Resource
    Electronic Resource
    Photoproduction of indole 3-acetic acid by Rhodobacter sphaeroides from indole and glycine (1999)
    Springer
    Biotechnology letters 21 (1999), S. 543-545 
    Details
    ISSN: 1573-6776
    Keywords: glycine ; indole ; indole 3-acetic acid ; photoproduction ; Rhodobacter sphaeroides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Rhodobacter sphaeroides photoproduced indole 3-acetic acid (IAA) when the precursor L-tryptophan was added to the basal medium. Of the other organic carbon sources that influenced IAA formation from L-tryptophan, α-ketoglutaric acid gave the maximum formation of 530 mg 1−1 in less than 24 h of illuminated anaerobic incubation. IAA was also produced from indole, glycine and glucose together by Rb. sphaeroides under photoanaerobic conditions yielding 61 mg l−1 within 30 fh.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005515906321
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  • 5
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    Rhodobacter vinaykumarii sp. nov., a marine phototrophic alphaproteobacterium from tidal waters (2007)
    Microbiology Society
    In:  International Journal of Systematic and Evolutionary Microbiology, 57 . pp. 1984-1987.
    Details
    Publication Date: 2019-09-23
    Description: A rod-shaped, phototrophic, purple non-sulfur bacterium was isolated in pure culture from seawater collected from the seashore of Visakhapatnam, on the east coast of India, in a medium that contained 2 % NaCl (w/v). Strain JA123(T) was Gram-negative and non-motile and had a requirement for NaCl. Photo-organoheterotrophic and chemo-organoheterotrophic growth occurred with organic compounds as carbon sources and electron donors. Photolithoautotrophic, chemolithoautotrophic and fermentative growth could not be demonstrated. Strain JA123(T) contained vesicular intracellular photosynthetic membrane structures. Bacteriochlorophyll a and probably carotenoids of the spheroidene series were present as photosynthetic pigments. Biotin was required for growth. Phylogenetic analysis on the basis of 16S rRNA gene sequences showed that strain JA123(T) clustered with species of the genus Rhodobacter. Based on 16S rRNA gene sequence analysis and morphological and physiological characteristics, strain JA123(T) is sufficiently different from other Rhodobacter species to propose a novel species, Rhodobacter vinaykumarii sp. nov., to accommodate this strain; the type strain is JA123(T) (=DSM 18714(T) =JCM 14544(T) =CCUG 54311(T)).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1099/ijs.0.65077-0
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  • 6
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    Rhodobium gokarnense sp. nov., a novel phototrophic alphaproteobacterium from a saltern (2007)
    Microbiology Society
    In:  International Journal of Systematic and Evolutionary Microbiology, 57 . pp. 932-935.
    Details
    Publication Date: 2019-09-23
    Description: A pink-pigmented, phototrophic, purple nonsulfur bacterium, strain JA173T, was isolated in pure culture from a saltern in Gokarna, India, in a medium containing 2 % (w/v) NaCl. Strain JA173T was a non-motile Gram-negative rod that multiplied by budding. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain JA173T clusters with the class Alphaproteobacteria; highest sequence similarity (98 %) was to the type strain of Rhodobium orientis and 94 % similarity was observed to the 16S rRNA gene sequence of the type strain of Rhodobium marinum. However, DNA–DNA hybridization with R. orientis DSM 11290T revealed a relatedness value of only 35.1 % with strain JA173T. Strain JA173T contained lamellar internal membranes, bacteriochlorophyll a and carotenoids of the spirilloxanthin series. Strain JA173T had an obligate requirement for NaCl (optimum growth at 2–6 %, w/v) and grew photoheterotrophically with a number of organic compounds as carbon source or electron donor. Photoautotrophic, chemoautotrophic and fermentative growth could not be demonstrated. Yeast extract was required for growth. Based on 16S rRNA gene sequence analysis, DNA–DNA hybridization data and morphological and physiological characteristics, strain JA173T is sufficiently different from other species of the genus Rhodobium to be recognized as a representative of a novel species, Rhodobium gokarnense sp. nov. The type strain is JA173T (=ATCC BAA-1215T=DSM 17935T=JCM 13532T).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1099/ijs.0.64843-0
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  • 7
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    Thiophaeococcus mangrovi gen. nov., sp. nov., a photosynthetic marine gammaproteobacterium isolated from Bhitarkanika mangrove forest, India (2008)
    Microbiology Society
    In:  International Journal of Systematic and Evolutionary Microbiology, 58 (11). pp. 2660-2664.
    Details
    Publication Date: 2017-05-29
    Description: A coccoid, phototrophic purple sulfur bacterium was isolated in pure culture from a mud sample collected from brackish water in the Bhitarkanika mangrove forest of Orissa, India, in a medium containing 2 % NaCl (w/v). This bacterium, strain JA304T, was Gram-negative and had a requirement for NaCl. Intracellular photosynthetic membranes were of the vesicular type. The colour of the phototrophically grown culture was saddle-brown. Bacteriochlorophyll a and the carotenoid lycopene were present as photosynthetic pigments. Strain JA304T was able to grow photolithoautotrophically and could photoassimilate a number of organic substrates. Yeast extract was required for growth of strain JA304T. The DNA G+C content was 68.1–68.9 mol%. 16S rRNA gene sequence comparisons indicate that the isolate represents a member of the Chromatiaceae within the class Gammaproteobacteria. According to sequence comparison data, strain JA304T is positioned distinctly outside the group formed by the four genera Thiocystis, Chromatium, Allochromatium and Thermochromatium, with only 86.7–91.0 % sequence similarity. Distinct morphological, physiological and genotypic differences from these previously described taxa support the classification of this isolate as a representative of a novel species in a new genus, for which the name Thiophaeococcus mangrovi gen. nov., sp. nov. is proposed. The type strain of Thiophaeococcus mangrovi is JA304T (=JCM 14889T =DSM 19863T). PABA, para-aminobenzoic acid The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain JA304T is AM748925. A phase-contrast micrograph and whole-cell absorption spectrum and an acetone spectrum of extracted pigments of strain JA304T are available as supplementary material with the online version of this paper.
    Type: Article , PeerReviewed
    Format: text
    Format: image
    Format: image
    DOI: 10.1099/ijs.0.65775-0
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  • 8
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    Rhodovulum visakhapatnamense sp. nov. (2007)
    Microbiology Society
    In:  International Journal of Systematic and Evolutionary Microbiology, 57 . pp. 1762-1764.
    Details
    Publication Date: 2017-05-29
    Description: A Gram-negative, rod-shaped, phototrophic bacterium (JA181T) was isolated from a tidal water sample. On the basis of 16S rRNA gene sequence similarity, strain JA181T was shown to belong to the class Alphaproteobacteria, most closely related to Rhodovulum sulfidophilum (97.8 % similarity to the type strain), Rhodovulum adriaticum (93 %), Rhodovulum robiginosum (93 %), Rhodovulum iodosum (94 %), Rhodovulum imhoffii (94 %), Rhodovulum strictum (95 %), Rhodovulum euryhalinum (94.6 %) and Rhodovulum marinum (94.6 %). DNA–DNA hybridization with Rdv. sulfidophilum DSM 1374T (relatedness of 39 % with strain JA181T) and physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain JA181T from the eight Rhodovulum species with validly published names. Strain JA181T therefore represents a novel species, for which the name Rhodovulum visakhapatnamense sp. nov. is proposed (type strain JA181T =JCM 13531T =ATCC BAA-1274T =DSM 17937T).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1099/ijs.0.65076-0
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  • 9
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    Rhodovulum marinum sp. nov., a novel phototrophic purple non-sulfur alphaproteobacterium from marine tides of Visakhapatnam, India (2006)
    Microbiology Society
    In:  International Journal of Systematic and Evolutionary Microbiology, 56 . pp. 1651-1656.
    Details
    Publication Date: 2018-05-29
    Description: A yellowish-brown bacterium was isolated from enrichment cultures inoculated with seawater samples from the eastern coast of India (Visakhapatnam) under photoheterotrophic conditions. Enrichment and isolation in a medium containing 2 % NaCl (w/v) yielded strain JA128T, which has ovoid to rod-shaped cells, also forms chains and is non-motile. Phylogenetic analysis on the basis of 16S rRNA gene sequences showed that strain JA128T clusters with the Alphaproteobacteria and the sequence similarity with its closest relatives, Rhodovulum iodosum and Rhodovulum sulfidophilum, was 95 %. Strain JA128T contained vesicular intracytoplasmic membranes, bacteriochlorophyll a and carotenoids of the spheroidene series. Strain JA128T was mesophilic, slightly acidophilic, slightly halophilic and grew photoheterotrophically with a number of organic compounds as carbon source and electron donor. It was unable to grow photoautotrophically, chemoautotrophically or by fermentative modes. It did not utilize sulfide, thiosulfate or hydrogen as electron donors. Thiamine was required as a growth factor. Based on the 16S rRNA gene sequence analysis, morphological and physiological characteristics, strain JA128T was significantly different from other species of the genus Rhodovulum and was recognized as a novel species for which the name Rhodovulum marinum sp. nov. is proposed. The type strain is JA128T (=ATCC BAA 1215T=CCUG 52183T=JCM 13300T).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1099/ijs.0.64005-0
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  • 10
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    Selective enrichment of Green Sulfur Bacteria in the presence of 4- Amino benzenesulfonate (Sulfanilate) (2007)
    Springer
    In:  World Journal of Microbiology & Biotechnology, 23 (3). pp. 393-399.
    Details
    Publication Date: 2019-09-23
    Description: A novel selective enrichment method is described for phototrophic green sulfur bacteria even in the presence of purple sulfur and purple nonsulfur bacteria using sulfanilate, which was discovered during efforts to selectively isolate sulfanilate-metabolizing anoxygenic phototrophic bacteria from marine habitats. Samples for these experiments were obtained from beaches, saltpans, subsurface mangrove soils, fish and prawn aquaculture ponds and backwaters of the East and West coasts of India. Photoorganoheterotrophic and photolithoautotrophic enrichments in the absence of sulfanilate predominantly yielded purple bacterial enrichments. In contrast, photolithoautotrophic enrichments in the presence of sulfanilate yielded green-colored enrichments from the same samples. Whole cell absorption spectra of the enrichment cultures revealed the presence of bacteriochlorophyll c and thus green phototrophic bacteria. Microscopic observation demonstrated the presence of sulfur globules outside the bacterial cells and the presence of non-motile cells, some of which had prosthecae. 16S rDNA sequences obtained from green sulfur bacterial strains isolated from enrichment cultures confirmed the presence of representatives of the green sulfur bacterial genera Prosthecochloris and Chlorobaculum. The selective pressure of sulfanilate exerted through inhibition of phototrophic purple sulfur bacteria was demonstrated by inhibition studies using the purple sulfur bacteria Marichromatium indicum JA100 and Marichromatium sp. JA120 (JCM 13533) and the green sulfur bacterium Prosthecochloris sp. JAGS6 (JCM 13299).
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1007/s11274-006-9237-y
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