Phenotypic plasticity in temperature stress resistance is triggered by photoperiod in a fly
Phenotypic plasticity in temperature stress resistance is triggered by photoperiod in a fly
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DOI：
10.1007/s10682-011-9547-x
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发表时间：
2012-07-01
影响因子：
1.9
通讯作者：
Dierks, Anneke
中科院分区：
文献类型：
--
作者：
Fischer, Klaus;Liniek, Susann;Dierks, Anneke
温度变化对个体的生存和繁殖成功构成了巨大挑战，这就要求采取有效手段来应对极端温度的负面影响。表型可塑性提供了一种特别强大的机制来科普短时间的温度波动。虽然温度诱导塑性在热耐受性中已被广泛探索，但其他环境因素的影响却很少受到关注。使用全因子设计，我们在这里表明，在温度胁迫抗性的变化可以触发由光周期（和温度）在飞Protophormia terraenoestrus，较短的日照长度诱导更多的冷和较长的日照长度更耐热的表型。这种可塑性变化与不同的发育途径（生殖活动或生殖滞育）无关，可以在发育过程中诱导，也可以在成虫阶段诱导（至少对于耐寒性）。我们认为，短期，光周期介导的昆虫热耐受性的变化代表了适应性季节可塑性的机制。光周期进一步影响发育时间和体型，其意义目前尚不清楚。
Temperature variation poses a substantial challenge for individual survival and reproductive success, warranting effective means to counter negative effects of temperature extremes. Phenotypic plasticity offers a particularly powerful mechanism to cope with short-time temperature fluctuations. While temperature-induced plasticity in thermal tolerance has been widely explored, effects of other environmental factors have received much less attention. Using a full-factorial design we here show that variation in temperature stress resistance can be triggered by photoperiod (and temperature) in the fly Protophormia terraenovae, with shorter day lengths inducing more cold- and longer day lengths more heat-tolerant phenotypes. Such plastic changes were not related to different developmental pathways (reproductive activity or reproductive diapause), and can be induced during development but also in the adult stage (at least for cold tolerance). We suggest that short-term, photoperiod-mediated changes in insect thermal tolerance represent a mechanism of adaptive seasonal plasticity. Photoperiod further affected development time and body size, the significance of which is currently unclear.