Abstract
Cells of the moderate halophile, Vibrio costicola, growing in a chemically defined minimal medium containing glutamate, glucose and vitamins, were devoid of polyamines. Cells growing in a complex medium (preteose peptone + tryptone) contained substantial amounts of several polyamines. These seemed to be incorporated from the medium itself, either directly or after some modification. The presence of polyamines in cell of V. costicola did not increase their osmotic stability when they were placed in lower NaCl concentrations than that of the growth medium. Addition of polyamines to chemically defined minimal medium did not affect growth of V. costicola. Another moderate halophile, NRCC 41227, produced spermidine in chemically defined minimal medium and contained other polyamines after growth in proteose peptone + tryptone. Less halophilic Vibrio species, Vibrio alginolyticus and Vibrio cholerae, produced a number of polyamines during growth in chemically defined minimal medium. Several extremely halophilic archaebacteria produced no, or only traces of, polyamines during growth on a medium containing yeast extract. Our results confirm the fact that not all bacteria contain polyamines; they also show that the polyamine content of some of these bacteria is directly determined by that of the growth medium.
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Schedule a callMore From: Biochimica et Biophysica Acta (BBA) - General Subjects
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