Streptomyces属放線菌による無機および有機水銀化合物からの水銀気化

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Hg^<2+>-resistant strains of Streptomyces, isolated largely from Cu-polluted soils, were examined for their ability to volatilize mercury from organomercurials as well as mercuric chloride. The following results were obtained.1. Strains resistant to mercuric chloride were also definitely resistant to merbromine, but weakly to phenyl mercuric acetate (PMA), methyl mercuric chloride (MMC) and thimerosal with the exception of strain 9-13.2. All of the Hg^<2+>-resistant strains studied volatilized mercury from the inorganic and organic mercurials. In the case of strain 9-13,the volatilized mercury was metallic (Hg^0), and the rate of volatilization from HgCl_2 was 2.5 nmol Hg min^<-1> per mg dry cells under the conditions reported by Clark et al.<10)>3. The ability of mercury volatilization from HgCl_2,PMA or MMC was induced in the culture medium containing HgCl_2 or PMA.4. When the actinomycete spores were inculated into the liquid medium containing mercurials, rapid growth took place after the mercurial was largely degraded and removed from the culture by the volatilization.
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