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Effects of $$gamma$$-ray irradiation on olfactory adaptation to benzaldehyde in ${it Caenorhabditis elegans}$

Sakashita, Tetsuya; Hamada, Nobuyuki*; Suzuki, Michiyo; Ikeda, Daisuke*; Yanase, Sumino*; Ishii, Naoaki*; Kobayashi, Yasuhiko

Using ${it Caenorhabditis elegans}$ as a model organism for studying the nervous system, we investigated the effects of $$gamma$$-ray irradiation on olfactory adaptation to benzaldehyde, in which animals show a decrease in chemotaxis to benzaldehyde. Irradiation during the conditioning for adaptation to benzaldehyde did not induce an additional decrease in chemotaxis immediately after irradiation. On the other hand, at 1 h after irradiation, the progress of adaptation to benzaldehyde was interrupted by irradiation with the highest dose. These results indicate that impaired olfactory adaptation to benzaldehyde following irradiation is different from salt chemotaxis learning in ${it C. elegans}$. Our findings suggest that the profile of radiation-induced response depends on the function of the nervous system in ${it C. elegans}$.

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