Developmental plasticity of thermal tolerances in temperate and subtropical populations of Drosophila melanogaster
Developmental plasticity of thermal tolerances in temperate and subtropical populations of Drosophila melanogaster
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DOI：
10.1016/j.jtherbio.2012.01.001
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发表时间：
2012-04-01
影响因子：
2.7
通讯作者：
Angilletta, Michael J., Jr.
中科院分区：
文献类型：
--
作者：
Cooper, Brandon S.;Tharp, Jeffery M., II;Angilletta, Michael J., Jr.
温度的变化对生物体施加了选择压力。在多变的环境中，生物体必须采取固定或可塑的策略，使其能够在广泛的温度范围内持续存在。在粗粒环境中，世代之间的热变化超过了世代之内，选择应该有利于发育可塑性。在这里，我们比较了发育可塑性的果蝇种群之间的热耐受性的程度，从环境中相对较高（马尔顿，新泽西州，美国）和相对较低（迈阿密，佛罗里达州，美国）的温度变化之间的世代。我们预测马尔顿的果蝇比迈阿密的果蝇表现出更大的耐热可塑性。从这两个群体的苍蝇饲养在三个生态相关的治疗，之后，我们评估击倒和寒冷昏迷恢复时间。这两个种群的苍蝇对温度的可塑性反应，但来自新泽西的苍蝇没有表现出更大的可塑性。我们的研究结果补充了以前的比较研究，并表明，选择有利于塑性的耐热性，同样在这些人口。(C)2012爱思唯尔有限公司保留所有权利。
Variation in temperature imposes selection pressures on organisms. In variable environments, organisms must adopt fixed or plastic strategies that enable persistence over a broad range of temperatures. In coarse-grained environments, where the thermal variation among generations exceeds that within generations, selection should favor developmental plasticity. Here, we compare the degree of developmental plasticity of thermal tolerances between populations of Drosophila melanogaster from environments with relatively high (Marlton, NJ, USA) and relatively low (Miami, FL, USA) variance in temperature among generations. We predicted that flies from Marlton would exhibit a greater plasticity of thermal tolerances than would flies from Miami. Flies from both populations were reared in three ecologically relevant treatments, after which we assessed knockdown and chill-coma recovery times. Flies from both populations responded plastically to temperature, but flies from New Jersey did not exhibit greater plasticity. Our results complement previous comparative studies and indicate that selection favors plasticity of thermal tolerances equally in these populations. (C) 2012 Elsevier Ltd. All rights reserved.