| rhodobaca bogoriensis gen. nov. and sp. nov., an alkaliphilic purple nonsulfur bacterium from african rift valley soda lakes. | from enrichment cultures established for purple nonsulfur bacteria using water and sediment samples from lake bogoria and crater lake, two soda lakes in the african rift valley, three strains of purple nonsulfur bacteria were isolated; strain lbb1 was studied in detail. cells of strain lbb1 were motile and spherical to rod-shaped, suggesting a relationship to rhodobacter or rhodovulum species, and the organism was capable of both phototrophic and chemotrophic growth on a wide variety of organic ... | 2000 | 10985738 |
| accumulation of unusual carotenoids in the spheroidene pathway, demethylspheroidene and demethylspheroidenone, in an alkaliphilic purple nonsulfur bacterium rhodobaca bogoriensis. | carotenoids extracted from cells of a novel alkaliphilic purple nonsulfur bacterium rhodobaca bogoriensis strain lbb1 included unusual carotenoids in the spheroidene pathway; demethylspheroidene, demethylspheroidenone, neurosporene and spheroidenone. spheroidene was present in only small amounts, and the demethyl-carotenoids demethylspheroidene and demethylspheroidenone predominated in phototrophic cultures. furthermore, the keto-carotenoids spheroidenone and demethylspheroidenone constituted ne ... | 2001 | 16228308 |
| [rhodobaca barguzinensis sp. nov., a new alkaliphilic purple nonsulfur bacterium isolated from a soda lake of the barguzin valley (buryat republic, eastern siberia)]. | a novel strain, alga-05, of alkaliphilic purple nonsulfur bacteria was isolated from sediments of a small saline (60 g/l) soda lake near lake algin (barguzin valley, buryat republic, russia). these bacteria contain bacteriochlorophyll a and carotenoids of the alternative spirilloxanthin group with predominating demethylspheroidenone. they are facultative anaerobes; their photosynthetic structures are of the vesicular type and arranged along the cell periphery. growth of this strain is possible i ... | 2008 | 18522327 |
| bacterial succession within an ephemeral hypereutrophic mojave desert playa lake. | ephemerally wet playas are conspicuous features of arid landscapes worldwide; however, they have not been well studied as habitats for microorganisms. we tracked the geochemistry and microbial community in silver lake playa, california, over one flooding/desiccation cycle following the unusually wet winter of 2004-2005. over the course of the study, total dissolved solids increased by approximately 10-fold and ph increased by nearly one unit. as the lake contracted and temperatures increased ove ... | 2009 | 18758846 |
| roseibaca ekhonensis gen. nov., sp. nov., an alkalitolerant and aerobic bacteriochlorophyll a-producing alphaproteobacterium from hypersaline ekho lake. | a gram-negative, aerobic rod was isolated from the hypersaline, heliothermal and meromictic ekho lake (east antarctica) at a depth of 6 m. the novel strain (designated el-50t) was oxidase-positive and weakly catalase-positive and metabolized a variety of carboxylic acids, alcohols, sugars and lipids. cells of strain el-50t had an absolute requirement for artificial seawater or nacl. optimum growth occurred at 16 degrees c and at ph values ranging from 7.0 to 9.5. a large in vivo absorption band ... | 2009 | 19567566 |
| roseicitreum antarcticum gen. nov. sp. nov., an aerobic bacteriochlorophyll a-containing alphaproteobacterium from antarctic sandy intertidal sediments. | a novel gram-negative, non-motile bacterium, designated zs2-28t, was isolated from sandy intertidal sediment samples collected from the coastal regions of the chinese antarctic zhongshan station on the larsemann hills, princess elizabeth land, east antarctica. strain zs2-28t was obligately heterotrophic, strictly aerobic, psychrotolerant (growth occurs at 0-33°c) and moderately halophilic (optimal nacl concentration of 7-8%). a single major peak in the infrared, at 872-874 nm, indicated the pres ... | 2010 | 20889763 |
| Defluviimonas denitrificans gen. nov., sp. nov., and Pararhodobacter aggregans gen. nov., sp. nov., non-phototrophic Rhodobacteraceae from the biofilter of a marine aquaculture. | Three Gram-negative bacterial strains were isolated from the biofilter of a recirculating marine aquaculture. They were non-pigmented rods, mesophiles, moderately halophilic, and showed chemo-organoheterotrophic growth on various sugars, fatty acids, and amino acids, with oxygen as electron acceptor; strains D9-3(T) and D11-58 were in addition able to denitrify. Phototrophic or fermentative growth could not be demonstrated. Phylogenetic analysis of the 16S rRNA gene sequences placed D9-3(T) and ... | 2011 | 21959289 |