Paramecium bursaria: Mating Types and Groups, Mating Behavior, Self-Sterility; their Development and Inheritance

1939 ◽  
Vol 73 (748) ◽  
pp. 414-431 ◽  
Author(s):  
H. S. Jennings





2021 ◽  
Vol 7 (24) ◽  
pp. eabf8404
Author(s):  
Alexander Anders ◽  
Remy Colin ◽  
Alvaro Banderas ◽  
Victor Sourjik

Anisogamy, the size difference between small male and large female gametes, is known to enable selection for sexual dimorphism and behavioral differences between sexes. Nevertheless, even isogamous species exhibit molecular asymmetries between mating types, which are known to ensure their self-incompatibility. Here, we show that different properties of the pheromones secreted by the MATa and MATα mating types of budding yeast lead to asymmetry in their behavioral responses during mating in mixed haploid populations, which resemble behavioral asymmetries between gametes in anisogamous organisms. MATa behaves as a random searcher that is stimulated in proportion to the fraction of MATα partner cells within the population, whereas MATα behaves as a short-range directional distance sensor. Mathematical modeling suggests that the observed asymmetric responses can enhance efficiency of mating and might thus provide a selective advantage. Our results demonstrate that the emergence of asymmetric mating behavior did not require anisogamy-based sexual selection.



1960 ◽  
Vol 46 (3) ◽  
pp. 344-349 ◽  
Author(s):  
R. W. Siegel ◽  
L. L. Larison


1963 ◽  
Vol 4 (1) ◽  
pp. 143-150 ◽  
Author(s):  
L. W. Cohen ◽  
R. W. Siegel

The detached cilia from sexually reactive cells of Paramecium bursaria will agglutinate with the cilia of intact sexually reactive animals of a complementary mating type. No such reaction will occur if incompetent cells are used or if the cells are of the same mating type. Particulates other than cilia do not adhere to tester cells; the cilia which carry the specific mating-type substances are restricted to the ventro-lateral surface of the animal.Studies of the heat inactivation of the ability of detached cilia to agglutinate confirm in detail the hypothesis of Metz which holds that cell unions leading to conjugation are brought about by the interaction of two pairs of complementary substances, A and a and B and b; the former pair of substances is more heat labile than the latter. The data suggest that animals of each of the four mating types carry a unique combination of two substances, namely, AB, aB, ab, and Ab.





1959 ◽  
Vol 100 (1) ◽  
pp. 25-26
Author(s):  
T.-T. Chen


1972 ◽  
Vol 11 (2) ◽  
pp. 601-609
Author(s):  
C. A. CULLIS

A mating type transformation, involving cell-to-cell contact (abortive conjugation) in syngen 4 of Paramecium bursaria has been investigated. By autoradiography, transfer of material between the conjugants in normal and abortive conjugation has been shown to occur. The transfer of this material, which includes protein, RNA and DNA, during abortive conjugation has been shown to be necessary if the transformation is to occur. The mating type substances produced by sexually competent cells of different mating types have been characterized with respect to their thermal stability. In all cases examined there appeared to be 3 mating type substances produced which had different temperature stabilities. No differences could be shown between the transformed cells and normal cells of the same mating type in relation to stability of mating type substance.



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