Geographic variation for climatic stress resistance traits in the springtail Orchesella cincta

S Bahrndorff, M Holmstrup, H Petersen… - Journal of Insect …, 2006 - Elsevier
Journal of Insect Physiology, 2006Elsevier
Multiple traits of stress resistance were investigated in the epedaphic springtail Orchesella
cincta. Second generation adults from five laboratory populations were compared with
respect to resistance to extreme temperatures and desiccation, and traits relevant to climatic
adaptation. Populations were collected along a 2000-km latitudinal gradient ranging from
Denmark to southern Italy and reared under the same standard laboratory conditions. Traits
investigated were resistance to high and low temperature, desiccation resistance, body size …
Multiple traits of stress resistance were investigated in the epedaphic springtail Orchesella cincta. Second generation adults from five laboratory populations were compared with respect to resistance to extreme temperatures and desiccation, and traits relevant to climatic adaptation. Populations were collected along a 2000-km latitudinal gradient ranging from Denmark to southern Italy and reared under the same standard laboratory conditions. Traits investigated were resistance to high and low temperature, desiccation resistance, body size and water loss rate (WLR). Results showed genetically based differences in resistance to high and low temperature, desiccation, WLR, water pool and body size between populations. Individuals from the most northern population had the highest desiccation—and cold shock resistance, and the lowest heat shock resistance. Females were significantly more desiccation resistant than males. The results of cold shock resistance showed a positive increase with lowest environmental temperature recorded at the sites of population origin, whereas heat shock resistance showed a positive increase with highest recorded temperature at the sites of population origin. Desiccation resistance increased towards the most southern and northern population, suggesting that both low and high temperature extremes affect desiccation resistance. Body mass, water pool and WLR showed interpopulation as well as sex specific variation. This provides evidence for geographical variation in stress resistance of springtails related to climatic conditions.
Elsevier
以上显示的是最相近的搜索结果。 查看全部搜索结果