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Journal of Cell Science, Vol 64, Issue 1 137-146, Copyright © 1983 by Company of Biologists

JOURNAL ARTICLES

Infection of macronuclear anlagen of Paramecium caudatum with the macronucleus-specific symbiont Holospora obtusa

M Fujishima and HD Gortz

The gram-negative bacterium Holospora obtusa is an endonuclear symbiont of Paramecium caudatum, which is incorporated into the host cells via the food vacuoles and infects their macronucleus exclusively, but never the micronucleus. Since these two kinds of nuclei originate from a fertilization nucleus, it is assumed that the macronucleus acquires a property necessary for it to be recognized by the bacterium at a certain time during the nuclear differentiation process. We found that this property is acquired by four of the eight postzygotic nuclei as soon as the four nuclei differentiate morphologically into the macronuclear anlagen.


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C. Maercker, H. Kortwig, and H. J. Lipps
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[Abstract] [Full Text]


© The Company of Biologists Ltd 1983