title: Effects of autogamy in Paramecium tetraurelia on catalase activity and on radiosensitivity to natural ionizing radiations.
abstract: Catalase activity of Paramecium tetraurelia decreased during autogamy and recovered to normal 5 days later. Autogamy also caused changes in the ciliate's sensitivity to natural ionizing radiations--the decrease in cell growth rate previously described in shielded cultures did not occur when autogamous cells were used. Maximum effect of shielding was observed in 11-day-old postautogamous cells. The role of the catalase in the mechanism of natural iradiation effect is discussed.
mesh_terms: D000818:Animals; D002374:Catalase / Q000378:metabolism*; D010247:Paramecium / Q000201:enzymology / Q000502:physiology / Q000528:radiation effects*; D011839:Radiation, Ionizing; D013223:Statistics as Topic
chemical_list: D002374:Catalase