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1

Salt stress tolerance of methylotrophic bacteria Methylophilus sp. and Methylobacterium sp. isolated from coal mine spoils

100%
Giri D. D., Kumar A., Shukla P. N., Singh R., Singh P. K., Pandey K. D.
Polish Journal of Microbiology
|
2013
|
tom 62
|
nr 3
Two methylotrophic strains of Bina coalmine spoil BNV7b and BRV25 were identified based on physiological traits and 16S rDNA sequence as Methylophilus and Methylobacterium species. The strains exhibited similar carbon utilization but differed in N utilization and their response to the metabolic inhibitors. Methylophilus sp. was less tolerant to salt stress and it viability declined to one tenth within 4 h of incubation in 2M NaCl due to membrane damage and leakage of the intracellular electrolytes as evident from malondiaaldehyde (MDA) assay. In 200 mM NaCl, they exhibited increased superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activity while in 500 mM NaCl, enzyme activities declined in Methylophilus sp. and increased in Methylobacterium sp. Among exogenously applied osmoprotectants proline was most efficient; however, polyols (mannitol, sorbitol and glycerol) also supported growth under lethal NaCl concentration.
2

Xanthobacter autrophicus P25 - a new methylotrophic bacteria synthetizing poly-beta-hydroxybutyrate

84%
Haber J., Doronina N. V., Ostafin M., Sokolov A. P., Trotsenko Y. A.
Acta Microbiologica Polonica
|
1995
|
tom 44
|
nr 1
3

Methylobacterium extorquens strain P14, a new methylotrophic bacteria producing poly-beta-hydroxybutyrate [PHB]

67%
Ostafin M., Haber J., Doronina N. V., Sokolov A. P., Trotsenko J. A.
Acta Microbiologica Polonica
|
1999
|
tom 48
|
nr 1
4

Some properties of methylotrophic bacteria isolated from sewage sludges derived from mechanical and biological sewage treatment plants

67%
Durska G.
Polish Journal of Microbiology
|
2007
|
tom 56
|
nr 4
The presented studies were carried out to get more information about physiological properties of methylotrophic bacteria selected from sewage sludges derived from mechanical and biological sewage treatment plants. All the isolated bacterial strains belonged to facultative methylotrophs. The majority of them utilized glucose, starch and lipids. Moreover, most of them were also found to possess proteolytic properties and were able to hydrolyze urea but they were incapable of asparagine ammonification.
5

Fungicide effect on nitrogenase activity in methylotrophic bacteria

67%
Durska G.
Polish Journal of Microbiology
|
2004
|
tom 53
|
nr 3
The study comprised tests on the effect of fungicides: Oxafun T, Funaben T and Baytan Universal on the nitrogenase activity of methylotrophic bacteria, selected from the rhizosphere and non-rhizosphere soil of spring barley. The obtained results indicated that the field dose of fungicides - 0.5 ppm had no effect on all the examined strains of methylotrophic bacteria. The dose of 50 ppm, however, had varied effects, suppressing or stimulating, depending on the particular strain. The highest concentration of fungicides applied, i.e. 100 ppm in all cases suppressed the nitrogenase activity of the strains under examination.
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