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An analysis of the determinative difference between singlets and doublets of Oxytricha fallax

Published online by Cambridge University Press:  14 April 2009

Gary W. Grimes
Gary W. Grimes
Affiliation:
Department of Zoology, Indiana University, Bloomington, Indiana
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Summary

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Doublets of Oxytricha fallax possess two complete sets of ciliature. The doublet phenotype is inherited through sexual and asexual reproduction as a cortically determined trait. The trait is also inherited through cystment, independent of cyst size. Prior work shows an absence of all visible cortical organelles, except cell membranes, in the cyst; thus the visible structures are not themselves determinative.

Results from excision experiments performed on encysting doublets indicate that the determinative difference between doublets and singlets is the presence of one or two ‘determinative regions’ located on the ventral surfaces of the organisms which serve as sites for the initiation of ciliary primordium development. Doublets possess two such areas, but singlets possess only one.

Information

Type
Research Article
Information
Genetics Research , Volume 21 , Issue 1 , February 1973, pp. 57 - 66
Copyright
Copyright © Cambridge University Press 1973

References

REFERENCES

Dawson, J. A. (1920). An experimental study of an amicronucleate Oxytricha. II. The formation of double animals or ‘twins’. Journal of Experimental Zoology 30, 128–157.Google Scholar
Fauré-Fremiet, E. (1945). Symétrie et polarité chez les ciliés bi-ou multicomposites. Bull. Biol. Fr. Blg. 79, 106–150.Google Scholar
Grimes, G. W. (1972). Cortical structure in nondividing and cortical morphogenesis in dividing Oxytricha fallax. Journal of Protozoology 19, 428–445.CrossRefGoogle Scholar
Grimes, G. W. (1973 a). Differentiation during encystment and excystment in Oxytricha fallax. Journal of Protozoology (in the Press).CrossRefGoogle Scholar
Grimes, G. W. (1973 b). Morphological discontinuity of kinetosomes during the life cycle of Oxytricha fallax. Journal of Cell Biology (in the Press).CrossRefGoogle Scholar
Hanson, E. D. (1962). Morphogenesis and regeneration of oral structures in Paramecium aurelia: An analysis of intracellular development. Journal of Experimental Zoology. 150, 46–68.Google ScholarPubMed
Hashimoto, K. (1961). Stomatogenesis and formation of cirri in fragments of Oxytricha fallax Stein. Journal of Protozoology 8, 433–442.CrossRefGoogle Scholar
Hashimoto, K. (1962). Relationships between feeding organelles and encystment in Oxytricha fallax Stein. Journal of Protozoology 9, 161–169.CrossRefGoogle Scholar
Jerka-Dziadosz, M. (1964). Localization of the organization area in course of regeneration of Urostyla grandis Ehrbg. Acta Protozoologica 2, 129–136.Google Scholar
Sonneborn, T. M. (1963). Does preformed cell structure play an essential role in cell heredity? In The Nature of Biological Diversity (ed. Allen, J. M.), pp. 165–221. New York: McGraw-Hill.Google Scholar
Sonneborn, T. M. (1970). Methods in Paramecium research. In Methods in Cell Physiology, vol. 4 (ed. Prescott, D. M.), pp. 347–366. New York: Academic Press.Google Scholar