Rhodoferax fermentans gen. nov., sp. nov., a phototrophic purple nonsulfur bacterium previously referred to as the ?Rhodocyclus gelatinosus-like? group

1991 ◽  
Vol 155 (4) ◽  
Author(s):  
Akira Hiraishi ◽  
Yasuo Hoshino ◽  
Toshio Satoh
Keyword(s):  
Purple Nonsulfur Bacterium ◽  
Rhodocyclus Gelatinosus ◽  
Rhodoferax Fermentans

IDENTIFICATION AND CHARACTERIZATION OF A PURPLE NONSULFUR BACTERIUM ISOLATED FROM COASTAL AREA OF HAI PHONG FOR USING IN PRODUCTION OF UNSATURATED FATTY ACID (OMEGA 6, 7, 9)

2019 ◽  
Vol 57 (6) ◽  
pp. 665 ◽  
Author(s):  
Yen Thi Hoang ◽  
Quynh Thi Thu Tran ◽  
Ha Hoang Chu ◽  
Tuyen Thi Do ◽  
Thanh Tat Dang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Unsaturated Fatty Acids ◽  
Nitrogen Sources ◽  
16S Rrna Analysis ◽  
Rhodovulum Sulfidophilum ◽  
Purple Nonsulfur Bacterium ◽  
High Lipid ◽  
Physiological Properties ◽  
Omega 6

Purple nonsulfur bacteria are a group that has so much biotechnological applications, particularly in producing of functional food rich with unsaturated fatty acids. A purple nonsulfur bacterium (named HPB.6) was chosen based on its strong growth, high lipid and synthesis of unsaturated fatty acid (omega 6,7,9). Studying on basic biological characteristics showed that the cells of HPB.6 were observed as ovoid-rod shape, none motility, Gram negative staining. The diameter of single bacterium was about 0.8-1.0 µm. The cells divide by binary fission and had bacteriochlorophyll a (Bchl a). This bacterium grew well on medium with carbon and nitrogen sources such as acetate, succinate, pyruvate, butyrate, glutamate, arginine, leucine, tyrosine, alanine, methionine, threonine, glutamine, yeast extract and NH4Cl. This selected strain grew well on medium with salt concentrations from 1.5 - 6.0% (optimum 3%), pH from 5.0 to 8.0 (optimum at pH 6.5) and could withstand Na2S at 4.0 - 5.2 mM. Based on morphological, physiological properties and 16S rRNA analysis received demonstrated that HPB.6 strain belongs to the species Rhodovulum sulfidophilum.

Exemplar Abstract for Rhodoferax fermentans Hiraishi et al. 1992.

2003 ◽  
Author(s):  
Charles Thomas Parker ◽  
Kara Mannor ◽  
George M Garrity
Keyword(s):  
Rhodoferax Fermentans

scholarly journals Isolation of Rhodocyclus gelatinosus from poultry slaughterhouse wastewater

2002 ◽  
Vol 45 (4) ◽  
pp. 445-449 ◽  
Author(s):  
Elisa Helena Giglio Ponsano ◽  
Pedro Magalhães Lacava ◽  
Marcos Franke Pinto
Keyword(s):  
Carbon Source ◽  
Photosynthetic Bacteria ◽  
Synthetic Medium ◽  
Poultry Feed ◽  
Gram Negative ◽  
Slaughterhouse Wastewater ◽  
Rhodocyclus Gelatinosus

Four cultures of photosynthetic bacteria isolated from poultry slaughterhouse wastewater were identified as Rhodocyclus gelatinosus based on the following properties: reddish color of cultures in synthetic medium, presence of motility, slightly curved Gram-negative rods morphology, gelatin liquefying activity, utilization of citrate as carbon source and production of bacteriochlorophyl a and carotenoids of the spirilloxanthin alternative series. R. gelatinosus may represent a source of nutrients and pigments with application in poultry feed.

The effect of respiration on the phototactic behavior of the purple nonsulfur bacterium Rhodospirillum centenum

1997 ◽  
Vol 167 (2-3) ◽  
pp. 99-105 ◽  
Author(s):  
Simona Romagnoli ◽  
Alejandro Hochkoeppler ◽  
Lars Damgaard ◽  
D. Zannoni
Keyword(s):  
Rhodospirillum Centenum ◽  
Phototactic Behavior ◽  
Purple Nonsulfur Bacterium

Characterization of Reaction Center-B875 Complex of Rhodocyclus gelatinosus: QB Site Properties Derived from Reconstitution Experiments

1991 ◽  
Vol 46 (1-2) ◽  
pp. 99-105 ◽  
Author(s):  
I. Agalidis ◽  
E. Rivas ◽  
F. Reiss-Husson
Keyword(s):  
Reaction Center ◽  
Protein Complex ◽  
Electron Acceptors ◽  
Rhodocyclus Gelatinosus ◽  
Pigment Protein Complex ◽  
Ubiquinone Binding ◽  
Dodecyl Ether ◽  
Particle Weight

Abstract Purified reaction center-B875 pigment-protein complex isolated from Rc. gelatinosus (I. Agalidis, E. Rivas, and F. Reiss-Husson, Photosynth. Res. 23, 249 - 255 (1990)) was further characterized. In the chromatophores, the quinone content was shown to be 6 menaquinones 8 and 16 ubiquinones 8 per reaction center, indicating that the pool contained both quinone types. Besides the primary (MK8) and secondary (UQ8 ) electron acceptors of the reaction cen­ter, the complex contains residual quinones from the membrane pool (about 3 MK8 and 5 UQ8) probably associated with the phospholipids. Apparent particle weight of the complex including bound detergent was 520 ± 46 kDa. The secondary quinone QB was partially removed from the RC by treatment with 2 -3 % octaethyleneglycol dodecyl ether and 3 -4 mᴍ orthophenanthroline. Reconstitution experi­ments showed that UQ6, UQ9 and UQ10 could replace QB but that MK8 and MK9 could not. It was concluded that QB site has a clear specificity towards ubiquinone binding.

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