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Specificity of the immaturity substances in Paramecium


, : Specificity of the immaturity substances in Paramecium. Journal of Cell Science 36: 253-260

Cytoplasm of Paramecium caudatum syngen 3 in the period of sexual immaturity was effective in inducing immaturity when injected into mating-reactive cells of other syngens of P. caudatum. When immature cytoplasm of P. caudatum was injected into mature cells of P. multimicronucleatum, immaturity was also induced in the latter cells. When cytoplasm of P. bursaria in the immaturity period was injected into mature cells of the same species, the latter became immature. But immature cytoplasm of P. caudatum was ineffective when injected into mature cells of P. bursaria. When immature cytoplasm of P. busaria was injected into mature cells of P. caudatum, no difference from the control was observed. These results suggest that a difference in specificity of the immaturity substances exists bewteen paramecia of the 'aurelia' group and those of the 'bursaria' group.

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Accession: 006459074

PMID: 457810

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Related references

Miwa, I., 1979: Immaturity substances in Paramecium primaurelia and their specificity. Cells of Paramecium primaurelia in the immaturity period of the life cycle contain substances which repress the expression of mating ability when introduced into mature cells. When the immature cytoplasm of P. primaurelia was injected into mating-...

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Takagi Y., 1974: The effect of uv irradiation on the period of immaturity in paramecium caudatum. Zoological Magazine (Tokyo) 83(1): 96-98

Jennings, H.S., 1944: Paramecium bursaria : Life history. I. Immaturity, maturity and age. Biological Bulletin Wood's Hole, 86: 131-145

Siegel, R.W., 1957: An analysis of the transformation from immaturity to maturity in Paramecium aurelia. Genetics, 42: 394-395

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