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Phenylmercuric acetate: metabolic conversion by microorganisms.

F Matsumura, Y Gotoh, G M Boush

Science (New York, N.Y.)

|July 2, 1971

Summary

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Phenylmercuric acetate is rapidly metabolized by microorganisms into diphenylmercury. Methylmercury derivatives were not found in microbial breakdown products of this common fungicide.

Area of Science:

Environmental chemistry
Microbiology

Background:

Phenylmercuric acetate (PMA) is an organomercurial compound extensively used as a fungicide and slimicide.
Understanding the environmental fate and microbial metabolism of PMA is crucial due to its widespread application.

Purpose of the Study:

To investigate the microbial metabolic pathways of phenylmercuric acetate in soil and aquatic environments.
To identify the primary metabolic products resulting from the biodegradation of PMA.

Main Methods:

Incubation of PMA with microorganisms from soil and aquatic samples.
Analysis of metabolic products using analytical chemistry techniques.

Main Results:

Phenylmercuric acetate undergoes rapid metabolism by both soil and aquatic microorganisms.

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Diphenylmercury was identified as a major metabolic product.

No methylmercury derivatives were detected among the microbial metabolic products of PMA.

Conclusions:

Microbial metabolism of phenylmercuric acetate leads to the formation of diphenylmercury.
The biodegradation pathway of PMA by microorganisms does not appear to produce methylmercury, a highly toxic congener.