Glycine betaine, carnitine, and choline enhance salinity tolerance and prevent the accumulation of sodium to a level inhibiting growth of Tetragenococcus halophila

Article Abstract:

The study shows that osmoregulation in cells of halophilic Tetragenococcus halophila bacterium is dependent on specific osmoprotectants and in their absence huge accumulation of sodium occurs. Data further point out that the salt concentration raises from 200 to 2,060 nanomoles per milligram of bacterial dry weight.

France, Statistical Data Included, Physiological aspects, Organic compounds, Carnitine, Salinity

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Transient accumulation of glycine betaine and dynamics of endogenous osmolytes in salt-stressed cultures of Sinorhizobium meliloti

Article Abstract:

A research was conducted to examine the fate of exogenously supplied glycine betaine and the dynamics of endogenous osmolytes throughout the growth cycle of salt-stressed cultures of strains of Sinorhizobium meliloti. Radiotracer and spectral evidence demonstrated that betaine was only transiently accumulated as a cytoplasmic osmolyte in young cultures of two wild-type strains. Results showed no further improvement in growth due to glycine betaine at high osmolarity in GM1766.

Symbiosis, Glycine

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Sequencing and characterization of the xyl operon of a gram-positive bacterium, Tetragenococcus halophila

Article Abstract:

The xyl operon of the gram-positive bacterium Tetragenococcus halophila was sequenced and compared with other xyl operons to examine its regulatory mechanism. The amino acid sequence alignment of the xyl operon presented similar characteristics to those found in other bacteria. Moreover, the operon's gene arrangement coincided with that of the Bacillus megaterium xyl operon indicating that its xylose transporter activity was not susceptible to inducer exclusion. Sequence results also showed that it has a binding site for hexose kinases.

Operons, Amino acid sequence, Amino acid sequencing

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