A Comparative Analysis of the Ultrastructure of Hydrocarbon-oxidizing Micro-organisms

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Abstract
The ultrastructure of a variety of microorganisms [bacteria and fungi] was compared after growth on hydrocarbon and non-hydrocarbon substrates. Hydrocarbon-grown organisms were characterized by the presence of intracellular electron-transparent inclusions which in many cases appeared membrane-bound. With 1 exception, non-hydrocarbon-grown organisms did not contain electron-transparent inclusions. Insignificant amounts of poly-.beta.-hydroxybutyric acid were produced by the hydrocarbon-grown microorganisms. After growth on hydrocarbons, all the microorganisms accumulated varying amounts of the respective unmodified hydrocarbon growth substrate.

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