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Characterization of a new platelet-forming purple sulfur bacterium, Amoebobacter pedioformis sp. nov. (1986)

Eichler, B. ; Pfennig, N.

Springer

Archives of microbiology 146 (1986), S. 295-300

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ISSN: 1432-072X

Keywords: Purple sulfur bacteria ; Gas vacuoles ; Platelet-formation ; Amoebobacter ; Spirilloxanthin ; Bacteriochlorophyll a

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Abstract The dominant purple sulfur bacterium of a reddish-colored waste water pond near Taichung, Taiwan, was isolated in pure culture, strain CML2. Individual cells were nearly spherical, nonmotile, and contained in their peripheral parts was vacuoles that appeared like elongated, curved tubes. Four to sixteen cells formed platelet-like aggregates reminiscent of Thiopedia rosea. The intracellular photosynthetic membrane system of the cells was of vesicular type; the photosynthetic pigments consisted of bacteriochlorophyll a and spirilloxanthin as the major carotenoid. The color of cell suspensions was pink to rosered. Under anaerobic conditions photolithoautotrophic growth occurred with sulfide, elemental sulfur or thiosulfate; sulfur globules were stored as an intermediary oxidation product. In the presence of sulfide, acetate, lactate and pyruvate were photoassimilated; strain CML2 lacked assimilatory sulfate reduction. Fastest photoautotrophic growth (11 h doubling time) was obtained at pH 7.5, 35°C and a light intensity of about 1000 lux (tungsten lamp). Chemolithoautotrophic growth in the dark was possible under reduced oxygen partial pressure with reduced sulfur compounds as respiratory substrates. The DNA base composition of strain CML2 was 65.5 mol% G+C. Strain CML2 is described as type strain of a new species, Amoebobacter pedioformis sp. nov., in the family Chromatiaceae.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00403233

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Dicyanmethanido- und Cyanamido-oxoanionen. Untersuchungen zum sauerstoffanalogen Charakter der C(CN)2- und NCN-Gruppen (1970)

Köhler, H. ; Eichler, B. ; Salewski, R.

Weinheim : Wiley-Blackwell

Zeitschrift für anorganische Chemie 379 (1970), S. 183-192

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ISSN: 0044-2313

Keywords: Chemistry ; Inorganic Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Description / Table of Contents: The equivalence of the C(CN)2- and the NCN-groups with oxygen in the series of homologous ions C(CN)-3, N(CN)-2, OCN- and NOC(CN)-2, NO-2 causes us to postulate a more general value of this relation. Arguments for the formulation of a pseudochalkogen series C(CN)2—NCN—O are discussed. Synthesis, structure and reactivity of some dicyanmethanido- and cyanamido-oxoanions RCOY-, CO2Y2-, COY2-2, NOY-, NO2Y-, PO3Y3-, PO2Y3-2 and SO2Y2- are described. (Y = C(CN)2, NCN.) The preparation of some triorganoleadacyles is reported.

Notes: Die weitgehende Äquivalenz der C(CN)2- und NCN-Gruppen mit Sauerstoff in den Reihen homologer Ionen C(CN)-3, N(CN)-2, OCN- und NOC(CN)-2, NO-2 führte zur Frage nach einer Generalisierbarkeit dieser Äquivalenzbeziehung. Verschiedene Argumente, die zur Formulierung der Pseudolkogenreihe C(CN)2—NCN—O führen, werden diskutiert. Synthese, Struktur und Reaktivität verschiedener Dicyanmethanido- und Cyanamido-oxoanionen RCOY-, CO2Y2-, COY2-2, NOY-, NO2Y-, PO3Y3-, PO2Y3-2, SO2Y2- (Y = C(CN)2, NCN) werden beschrieben. Über die Darstellung von Triphenylbleiacylen wird berichtet.

Additional Material: 1 Tab.