Letter | Published:

Effects of Salts on Emergence from the Cyst in Protozoa

Nature volume 140, pages 645646 (09 October 1937) | Download Citation

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Abstract

THE physiology of encystment and excystment of Protozoa and other micro-organisms has received little attention. In the case of the ciliate Colpoda cucullus, it has been earlier shown1 that emergence from the cyst, or excystment, is brought about by some special substances present in the excysting medium, which is usually hay infusion. Part at least of the active material was shown to be ether-soluble. We have therefore subjected hay infusion to fractionation in order to isolate and identify the active excysting substance.

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References

  1. 1.

    , and , J. Exp. Zool., 69, 37–57 (1934).

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Affiliations

  1. Harvard Biological Laboratories, Cambridge, Mass. Sept. 10.

    • KENNETH V. THIMANN
    •  & A. J. HAAGEN-SMIT

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DOI

https://doi.org/10.1038/140645b0

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