Osmoprotection by pipecolic acid in Sinorhizobium meliloti: specific effects of D and L isomers

Article Abstract:

Research has been conducted on the DL-pipecolic acid that promotes Sinorhizobium meliloti cell growth restoration. The results of the chromatographic analysis of intracellular solutes are described.

Georgia, Statistical Data Included, Analysis, Growth factors, Isomerization, Acids, Microbiological research, Chromatography

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Differential effects of dimethylsulfoniopropionate, dimethylsulfonioacetate, and other S-methylated compounds on the growth of Sinorhizobium meliloti at low and high osmolarities

Article Abstract:

Research was conducted to examine the effects of the algal extract from the marine alga Ulva lactuca and other S-methylated analogs of 3-dimethylsulfoniopropionate (DMSP) and 2-dimethylsulfonioacetate (DMSA) on the growth and physiology of Sinorhizobium meliloti. Results demonstrate that DMSP serves as a nonmetabolizable osmoprotectant and that DMSA can be highly toxic. Findings also provide insight into the possible roles of DMSA that are different from osmoregulation.

Microbial metabolism, Bacterial growth

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Disaccharides as a new class of nonaccumulated osmoprotectants for Sinorhizobium meliloti

Article Abstract:

Sucrose and ectoine belong to a new class of nonaccumulated osmoprotectants for Sinorhizobium meliloti, which also includes the six disaccharides, namely, trehalose, maltose, cellobiose, gentiobiose, turanose and palatinose. Sucrose, like ectoine, is an unusual but highly effective osmoprotectant for S meliloti strains because it does not accumulate as cytosolic osmolytes in S meliloti cells. Sucrose, trehalose, maltose and cellobiose also act as powerful osmoprotectants for several strains of Rhizobium leguminosarum.

Bacteria, Sugars, Carbohydrates, Composition, Sucrose

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