Stress resistance of drosophila adapted to hypoxia
Keywords:
normobaric hypoxia, Drosophila melanogaster, thermal stability, phototaxis, alimentary deprivationAbstract
Оregon-R and Canton-S Drosophila melanogaster stocks were tested for resistance to hypoxia. Drosophila control group (I) was kept at normal oxygen content (21%). Subpopulations were distinguished as high resistant to hypoxia (ІІ group) and low resistant (ІІІ group). Flies of II and III groups were incubated in constant normobaric hypoxia (8–10 % O2) for 16 generations. An increase in the stability of males and females of the second group to the high temperature was marked. High temperature resistance of males and females of the III group of both stocks decreased. The number of individuals with positive phototaxis in the II group (both males and females) of Canton-S stock, as well as in the III group (females) of both stocks increased. Resistance to alimentary deprivation also increased in males and females of Canton-S stock in the groups II and III. Starvation resistance increased in Oregon-R stock only in females of the ІІ group. The substantial increase of hypoxia resistance is marked for the II group of both stocks without depending on sex. The increase of resistance to stress occurred only in the II group, and in flies of the III group such effect of cross-adaptation was not observed.
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