Ref ID : 4214
Akada Rinji; Spontaneous Selfing (Intraclonal Conjugation) in the Ciliate Euplotes patella Syngen 2 Takes Place without a Change in Mating Type Expression. J.Protozool. 33(2):235-237, 1986
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Cells of Euplotes patella syngen 2 have been found to excrete mating-type-specific gamones (mating-inducing factors) into the surrounding medium. In strains of E. patella syngen 2, intraclonal conjugation (selfing) sometimes occurred spontaneously. Cell-free fluids of clonal cultures in which spontaneous selfing occurred were not effective in inducing homotypic pair formation in other cultures of the same mating type as the culture from which the cell-free fluids were derived. This indicates that selfing cultures produce only those gamones expected of their own mating types. This result suggests that spontaneous selfing in E. patella syngen 2 is not due to change of mating type expression. The possible mechanisms for spontaneous selfing in E. patella syngen 2 are discussed.