. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MATING AND CILIARY INACTIVATION 161 Swimming behavior during chemical induction of conjugation In Paramecium, various chemical agents under Ca-poor conditions induce selfing pairs among cells of a single mating type (Miyake, 1958, 1968). Selfing pairs appear in about 60 min in the induction medium without prior occurrence of agglutinative mating reaction. Cells show a marked change in their swimming behavior during the chemical treatment (Miyake, 1958; Tsukii and Hiwatashi, 1978; Cronkite, 1979). The change in the swimming b
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MATING AND CILIARY INACTIVATION 161 Swimming behavior during chemical induction of conjugation In Paramecium, various chemical agents under Ca-poor conditions induce selfing pairs among cells of a single mating type (Miyake, 1958, 1968). Selfing pairs appear in about 60 min in the induction medium without prior occurrence of agglutinative mating reaction. Cells show a marked change in their swimming behavior during the chemical treatment (Miyake, 1958; Tsukii and Hiwatashi, 1978; Cronkite, 1979). The change in the swimming behavior of the cells treated with the conjugation-inducing. H FIGURE 3. Photographs of swimming tracks of P. caudatum when introduced into a chemical induction medium. A-D; immature cells of stock 27aG3-Sl. E-H; mating reactive mature cells of stock 27aG3-Sl. A, E; adapting cells in a solution containing 1 mA/ KC1, 1 mM CaCl2, and 1 mM Tris-HCl, pH at 25°C. B, F; cells in the induction medium 30 s after the transfer. C, G; cells in the induction medium 10 min after the transfer. D, H; cells 40 min after the transfer. The photographs were taken under dark-field illumination with 2 s exposure. Bar = 2 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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