Abstract
The quantitative growth characteristics of the soil oligotrophic bacterium Agromonas oligotrophica JCM 1494 on diluted nutrient broth were investigated. The growth of the bacterium was totally inhibited in full strength nutrient broth (NB) but was supported in serially diluted NB of NB/10, NB/100, NB/1, 000, and NB/10, 000 with varied specific growth rates (k, 1/hr) of 0.102, 0.156, 0.117, and 0.089, respectively. The Ksvalue for NB was estimated to be NB/17, 500 or 0.46mg as organic carbon/ml. A yield value of 1.48×109 colony-forming unit mg of organic carbon was also calculated from the maximum growth yield analysis. From these results the oligotrophic nature of the bacterium was compared to those of other known oligotrophic bacteria.
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