Genetic determination of succinate dehydrogenase activity in Anopheles messeae (Diptera, Culicidae) larvae
2009
Perevozkin, V. P | Kurovsky, A. V
The present study aimed to reveal differences in the activity of a mitochondrial enzyme, succinate dehydrogenase (SDG), in larvae of mosquito Anopheles messeae with various karyotypes. Four-instar larvae of malaria mosquito previously obtained in laboratory conditions from imagoes collected in a taiga population of Tomsk region served as material for the study. Assessment of SDG activity indices demonstrated its regular variation in mosquito larvae with different karyotypes. Maximum succinate dehydrogenase activity was detected in tissues of larvae carrying combinations of XL₁, XL₂, 2R₁, 3R₁, 3L₁ inversions, in which mostly inhabit the northeastern part of the species range. The lowest enzyme activity was observed in larvae with alternative chromosomal variants (XL₀, 2R₀, 3R₀, 3L₀), predominantly inhabiting the southwestern part of the range. Moreover, the studied physiologic-biochemical features of the mosquitoes were shown to depend on the set of inversions in the karyotypes: in the higher the number of variants of chromosomal aberrations in the karyotype characteristic of the northern latitudes, of the higher the activity index, and vice versa. The significance of the relationships between the nuclear and the mitochondrial genome functioning in adaptive regulation of the cell energy metabolism in A. messeae larvae is discussed.
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