Results 211 to 220 of about 31,371 (261)

Extranuclear DNA and the Endosymbionts of Paramecium aurelia

Nature New Biology, 1971
THE basis of cytoplasmic inheritance in the killer system of Paramecium aurelia has been located to endosymbionts* in the cytoplasm. Breeding experiments have shown the maintenance and replication of some of the endosymbionts in their cellular environment to depend on nuclear genes of the Paramecium host cell1.
Ian Gibson, J. Williams, Michael Chance
openaire   +3 more sources

Coexistence in Laboratory Populations of Paramecium Aurelia and Its Predator Didinium Nasutum

, 1973
Previous attempts at the prolonged laboratory study of predator—prey systems lacking refuges or physical complexity have been unsuccessful. The addition of Methyl Cellulose to interacting laboratory populations of Paramecium aurelia and its predator ...
L. Luckinbill
semanticscholar   +1 more source

Interspecies transfer of mitochondria in Paramecium aurelia

Molecular and General Genetics MGG, 1976
Erythromycin-resistant mitochondria from species 1, 5 and 7 of P. aurelia were injected into erythromycin-sensitive paramecia of each of the same three species. Mitochondria from species 1 and 5 were successfully transferred to all three species, but species 7 mitochondria failed to develop in species 1 and 5.
G. H. Beale, J. K. C. Knowles
openaire   +3 more sources

Application of a Multiplex PCR with Specific PCR Primers for the Detection of the Genus Paramecium and the Paramecium aurelia Complex

, 2011
The representatives of the genus Paramecium are well-studied ciliates and can be used in water quality assessment and the determinations of saprobic levels.
Madlen Haentzsch, Detlef Bernhard, T. Berendonk, E. Przybós, M. Schlegel   +4 more
semanticscholar   +1 more source

Alpha, an infectious macronuclear symbiont of Paramecium aurelia.

The Journal of Protozoology, 1969
SYNOPSIS. A spiral, rod- or crescent-shaped symbiont here designated alpha, is present in the macronucleus of killer stock 562, syngen 2 of Paramecium aurelia. This stock has a cytoplasmic symbiont, kappa, as well as alpha.
L. B. Preer
semanticscholar   +1 more source

The classes of kappa in Paramecium aurelia *

Journal of Cell Science, 1972
ABSTRACT Kappas (bacterial symbionts containing R bodies) have been studied in 16 strains of Para mecium aurelia, syngens 2 and 4. All produce toxins capable of killing sensitive paramecia. The first major class, the 51 group (consisting of the kappas of strains 51, 116, and 298), has R bodies which, when the pH is lowered below 6·5 ...
Louise B. Preer, Jr Jr Preer, B. M. Rudman, A. Jurand   +3 more
openaire   +3 more sources

Complete sequence of the mitochondrial genome of Tetrahymena pyriformis and comparison with Paramecium aurelia mitochondrial DNA.

Journal of Molecular Biology, 2000
We report the complete nucleotide sequence of the Tetrahymena pyriformis mitochondrial genome and a comparison of its gene content and organization with that of Paramecium aurelia mtDNA. T.
G. Burger, Yun Zhu, T. Littlejohn, S. Greenwood, M. N. Schnare, B. Lang, M. Gray   +6 more
semanticscholar   +1 more source

Mitochondrial Genetics of Paramecium aurelia

1981
Publisher Summary This chapter discusses the mitochondrial genetics of Paramecium aurelia (P. aurelia). There are substantial differences among the mitochondrial genetic systems of the ciliate protozoa and corresponding systems in yeast and other groups.
A. Tait, G.H. Beale
openaire   +2 more sources

The formation of the feeding organelle in Paramecium aurelia

Journal of Experimental Zoology, 1973
AbstractThe control of formation of the feeding or buccal structures in Paramecium aurelia has been studied by damaging or eliminating this organelle by means of a microbeam of ultraviolet light and following the fate of treated cells through subsequent fissions and autogamy.
Earl D. Hanson, Ross M. Ungerleider
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Analysis of prefission morphogenesis in Paramecium aurelia

Journal of Experimental Zoology, 1968
AbstractParamecium aurelia has been exposed to varying concentrations of actinomycin D for extended periods and to a high concentration starting at various specific times in the cell cycle. Extended exposures at 5 μg of actinomycin per 1.0 ml of culture medium are lethal as are 24 hour exposures at 20 μ/1.0 ml.
Earl D. Hanson, Kulbir S. Gill
openaire   +3 more sources