| natroniella acetigena gen. nov. sp. nov., an extremely haloalkaliphilic, homoacetic bacterium: a new member of haloanaerobiales | a new extremely haloalkaliphilic, chemoorganotrophic, homoacetogenic bacterium strain z-7937(t)(t-type strain) was isolated from the bottom mud of the soda-depositing lake magadi, kenya. it is an obligately anaerobic, motile, gram-negative, spore-forming rod growing in the ph range ph 8.1 to 10.7 and optimally in the range ph 9.7 to 10.0 under conditions of high alkalinity caused by saturation with trona. it has an obligate requirement for sodium carbonate and chloride ions. the optimum salt con ... | 1996 | 8661677 |
| [difference in ionic specificity of atp synthesis in extremely alkalophilic sulfate-reducing and acetogenic bacteria]. | ionic specificity of oxidative phosphorylation was studied in natroniella acetigena and desulfonatronum lacustre, which are new alkaliphilic anaerobes that were isolated from soda lakes and have a ph growth optimum of 9.5-9.7. the ability of their cells to synthesize atp in response to the imposition of artificial delta ph+ and delta pna+ gradients was studied. as distinct from other marine and freshwater sulfate reducers and extremely alkaliphilic anaerobes, d. lacustre uses a na(+)-translocati ... | 2001 | 11558270 |
| [elemental composition of extremely alkaliphilic anaerobic bacteria]. | the contents of several chemical elements were assessed in the haloalkaliphilic acetogenic bacterium natroniella acetigena and the alkaliphilic sulfate-reducing bacterium desulfonatronum lacustre using x-ray microanalysis, stereoscanning microscopy, and mass spectrometry. the organisms were found to differ significantly in their relative contents of s, k, p, and cl. the p/s ratio in cells of the alkaliphilic bacteria studied grown on mineral media at different ph was ph-dependent. with a ph incr ... | 2002 | 11910804 |
| [osmoadaptation in representatives of haloalkaliphilic bacteria from soda lakes]. | the adaptation of microorganisms to life in brines allows two strategies: the accumulation of organic osmoregulators in the cell (as in many moderate halophiles, halomonads in particular) or the accumulation of inorganic ions at extremely high intracellular concentrations (as, for example, in haloanaerobes). to reveal the regularities of osmoregulation in haloalkaliphiles developing in soda lakes, halomonas campisalis z-7398-2 and halomonas sp. air-2 were chosen as representatives of halomonads, ... | 2005 | 16400982 |
| [carboanhydrase activity in halophilic anaerobes from soda lakes]. | the activity and cellular localization of carboanhydrase (ca) in two alkaliphilic anaerobes growing in soda lakes at ph 9-10 was studied. ca activity in the cell extracts of the acetogenic bacterium natroniella acetigena was comparable to that of the neutrophilic acetogens. hydrogenotrophically grown cells of desulfonatronum lacustre exhibited higher ca activity compared to the cells grown on media with formate. high ca activity in the cytoplasmic fraction and the absence of high activity in the ... | 2006 | 16579438 |
| [relationships between the osmoadaptation strategy, amino acid composition of total cellular protein, and properties of certain enzymes of haloalkaliphilic bacteria]. | haloalkaliphilic microorganisms isolated from soda lakes were compared in terms of the amino acid composition of total cellular protein and the reaction of a number of key enzymes to salts and ph of the medium. in the extremely halophilic bacterium natroniella acetigena (salt-inside osmoadaptation strategy), acidic amino acids (glutamic and aspartic) made up 30.91 mol % of the total of cellular protein amino acids. in the moderate haloalkaliphiles tindallia magadiensis, halomonas campisalis, and ... | 2006 | 16871796 |
| sulfur-dependent respiration under extremely haloalkaline conditions in soda lake 'acetogens' and the description of natroniella sulfidigena sp. nov. | microbial sulfidogenesis is the main dissimilatory anaerobic process in anoxic sediments of extremely haloalkaline soda lakes. in soda lakes with a salinity >2 m of the total na(+) sulfate reduction is depressed, while thiosulfate- and sulfur-dependent sulfidogenesis may still be very active. anaerobic enrichments at ph 10 and a salinity of 2-4 m total na(+) from sediments of hypersaline soda lakes with thiosulfate and elemental sulfur as electron acceptors and simple nonfermentable electron don ... | 2011 | 21438913 |