Thermal Tolerance in Widespread and Tropical Drosophila Species: Does Phenotypic Plasticity Increase with Latitude?
Thermal Tolerance in Widespread and Tropical Drosophila Species: Does Phenotypic Plasticity Increase with Latitude?
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DOI：
10.1086/661780
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发表时间：
2011-10-01
影响因子：
2.9
通讯作者：
Hoffmann, Ary A.
中科院分区：
文献类型：
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作者：
Overgaard, Johannes;Kristensen, Torsten N.;Hoffmann, Ary A.
昆虫的分布通常与它们对极端温度的反应变化有关，这反过来又可能反映了塑料反应的差异或抵抗力的先天变化。预计分布广泛的物种比来自受限热带地区的物种进化出更高水平的可塑性。这项研究比较了澳大利亚东部五种广泛分布的果蝇物种和五种限制性热带果蝇物种的成虫温度限制，并研究了在控制环境变化和系统发育后，这些限制如何受到发育适应和硬化的影响。无论驯化情况如何，分布广泛的物种的耐寒性都较高。模拟温带条件下的发育性冷驯化将寒冷极限延长了 2 至 4 ℃，而模拟热带条件下的发育性热驯化则将热上限提高了
The distribution of insects can often be related to variation in their response to thermal extremes, which in turn may reflect differences in plastic responses or innate variation in resistance. Species with widespread distributions are expected to have evolved higher levels of plasticity than those from restricted tropical areas. This study compares adult thermal limits across five widespread species and five restricted tropical species of Drosophila from eastern Australia and investigates how these limits are affected by developmental acclimation and hardening after controlling for environmental variation and phylogeny. Irrespective of acclimation, cold resistance was higher in the widespread species. Developmental cold acclimation simulating temperate conditions extended cold limits by 2 degrees-4 degrees C, whereas developmental heat acclimation under simulated tropical conditions increased upper thermal limits by