Ref ID : 4346
Matsuoka Tatsuomi, Mamiya Ryusuke, and Taneda Koji; Temperature-Sensitive Responses in Blepharisma. J.Protozool. 37(4):323-328, 1990
Reprint
In File
Notes
Temperature sensitivity of Blepharisma cultured at 23 degrees C was investigated in a temperature range between 18.5 degrees C and 33.5 degrees C. The cells accumulated in an optimal temperature (ca. 27 degrees C) region when they were placed in a chamber with a temperature gradient, although a certain population of the cells accumulated at much higher temperatures. The quantitative analysis of behavioral responses exhibited by the cells revealed that three types of thermal response were responsible for thermoaccumulation of the cells in an optimal temperature: (1) an increase in the frequency of thermophobic response in the cells swimming away from the optimal temperature region; (2) acceleration of forward swimming velocity of the cells swimming toward the optimal temperature region; and (3) higher frequency of spontaneous ciliary reversal of the cells in higher temperature regions.