The effects of NaCl on the growth of a Halomonas species: accumulation and utilization of compatible solutes

Article Abstract:

A Halomonas SPC1 can grow in cultures of low salinity and the addition of water, KCl or sucrose decreases growth which can be restored by adding NaCl. The bacteria uses both glucose and glycine betaine as the carbon source and the transport of glycine betaine is stimulated by NaCL. Glycine betaine is also used as a compatible solute and in the absence of external compatible solutes de novo ectoine takes place. If the salinity of the culture is very high, growth is inhibited probably because the enzymes involved in the glycine betaine catabolic pathway are highly sensitive to salinity.

Analysis, Salt, Salt (Food), Biocompatibility

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Fatty acid adaptation in an Antarctic bacterium - changes in primer utilization

Article Abstract:

The fatty acid components and temperature/growth characteristics of a psychrophilic bacterium ACAM 456 obtained from Antarctic sea-ice are presented. The acyl components can be classified into three groups; even-chian, odd-chain and iso-branched odd-chain. ACAM 456 changed its use of the acyl primer molecules to be able to adapt to changes in the environment. The regulation of the odd-chain length fatty acids illustrate an unusual adaptational response.

Physiological aspects, Fatty acids

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A Rhodococcus species that thrives on medium saturated with liquid benzene

Article Abstract:

Rhodococcus sp. strain 33, which was found from a contaminated site in Sydney, Australia, was found to thrive in liquid benzene levels that are known to be toxic to other micro-organisms. The bacterium is a short Gram positive rod that can grow in six percent sodium chloride, zero to 37 degrees Centigrade and two to 10 ph. It can degrade 95% of the benzene in concentrations averaging 200 p.p.m.

Bioremediation, Benzene

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