Experimental evolution of response to anoxia in Drosophila: recovery of locomotion following CO2 or N2 exposure RESEARCH ARTICLE

We examined three populations of Drosophila melanogaster (designated B) that have been inadvertently under selection for rapid recovery from CO2 exposure for nearly 40 years (around 1,000 generations) resulting from routine maintenance practices. We contrasted CO2 and N2 (presumed a less reactive gas) knockdown and recovery times of these B flies with six populations of common ancestry (A and C populations) that were not exposed to CO2 over the same period. We found that B populations showed faster and more consistent locomotor recovery than A or C populations after CO2 knockdown, a result also observed with N2 knockdown. A and C populations showed much higher variance in recovery time after CO2 exposure than after N2 exposure, suggesting gas-specific effects on pathways associated with locomotor recovery. While these selection treatments result in considerable variation in life history attributes and body size, with the characteristic intermediacy of B populations, their superiority in resistance to gas exposure and locomotor recovery suggests that it is a direct consequence of prior repeated exposure to anoxia, broadly, and CO2, specifically. Hence we describe a powerful new evolutionary model for the genetic and physiological investigation of anoxic coma in insects.
Source: Journal of Experimental Biology - Category: Biology Authors: Tags: RESEARCH ARTICLE Source Type: research

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Source: Journal of Neurogastroenterology and Motility - Category: Gastroenterology Tags: J Neurogastroenterol Motil Source Type: research
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Source: Biocatalysis and Agricultural Biotechnology - Category: Biotechnology Source Type: research
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Source: Endocrine, Metabolic and Immune Disorders Drug Targets - Category: Drugs & Pharmacology Tags: Endocr Metab Immune Disord Drug Targets Source Type: research
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Source: Endocrine, Metabolic and Immune Disorders Drug Targets - Category: Drugs & Pharmacology Tags: Endocr Metab Immune Disord Drug Targets Source Type: research
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Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
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