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An extremely halophilic red micro-organism designated strain TM(T) was isolated from a solar saltern in Alexandria, Egypt. The micro-organism stains gram-negative, is very pleomorphic, non-motile and strictly aerobic and requires at least 10 g NaCl l(-1) for growth. The growth optimum is 250 g NaCl l(-1). Growth is also observed over a wide range of MgSO4(More)
A yellow-pigmented, Gram-negative, motile, strictly aerobic, pleomorphic bacterium (strain TDMA-16(T)) was isolated from a freshwater sample collected at Misasa (Tottori, Japan). Strain TDMA-16(T) was slightly tolerant to gamma-ray irradiation and produced carotenoids, including zeaxanthin, nostoxanthin and an unknown carotenoid, effectively [1.7 mg (g dry(More)
The production of carotenoids from Haloferax alexandrinus strain TM(T) was investigated at various concentrations of NaCl (10-25%) in culture media under non-aseptic conditions. PCR and dot blot hybridization assays were employed to monitor the growth of Hfx. alexandrinus in the culture under aseptic and non-aseptic conditions. The amplified PCR products of(More)
A yellow-pigmented, Gram-negative, strictly aerobic, rod-shaped bacterium (TDMA-5(T)) was isolated from a freshwater sample collected at Misasa (Tottori, Japan). The DNA G+C content was 38.6 mol%. Major fatty acids were iso-C(15 : 0), iso-C(17 : 0) 3-OH and summed feature 4 (iso-C(15 : 0) 2-OH and/or C(16 : 1)omega7c). MK-7 was the predominant respiratory(More)
Soil samples from a salt farm were used as a source for the isolation of carotenoid-producing bacteria. The conditions for optimum growth and carotenoid production were established for the isolated bacteria. Carotenoids were analysed by spectrophotometry and High Performance Liquid Chromatography (HPLC). Thirty-one red extremely halophilic bacteria were(More)
A novel strictly aerobic, gliding, Gram-negative, rod-shaped, halo- and mesophilic bacterium (TD-ZX30(T)) was isolated from a seawater sample collected on the Pacific coastline of Japan near Kamakura City (Fujisawa, Kanagawa). The temperature range for growth of TD-ZX30(T) was between 16 and 44 degrees C. The DNA G+C content was 32.0mol%. The predominant(More)
We obtained carotenoid-producing microorganisms at a high frequency from water samples collected at Misasa (Tottori, Japan), a region known for its high natural radioactivity content. A comprehensive 16S rRNA gene-based phylogenetic analysis revealed that the 104 potential carotenoid producers isolated from Misasa could be classified into 38 different(More)
Two gamma- and UV-radiation resistant, Gram-positive, red- or pink-pigmented, rod-shaped, strictly aerobic, oxidase- and catalase-positive bacterial strains, TDMA-25T and TDMA-uv51T, were isolated from fresh water collected at Misasa, a radioactive site in Japan. Phylogenetic analysis based on 16S rRNA gene sequences placed both in a distinct lineage in the(More)
A novel marine, Gram-negative, yellow-pigmented, rod-shaped, strictly aerobic, gliding and oxidase- and catalase-positive bacterium (strain TD-ZE3(T)) was isolated from a seawater sample collected off the Pacific coastline of Japan near Enoshima Island (Fujisawa, Kanagawa). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain(More)