Transgenerational response to early spring warming in Daphnia
Transgenerational response to early spring warming in Daphnia
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DOI：
10.1038/s41598-019-40946-3
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发表时间：
2019-03
影响因子：
4.6
通讯作者：
K. Toyota;Maria Cambronero Cuenca;Vignesh Dhandapani;A. Suppa;V. Rossi;J. Colbourne;L. Orsini
中科院分区：
文献类型：
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作者：
K. Toyota;Maria Cambronero Cuenca;Vignesh Dhandapani;A. Suppa;V. Rossi;J. Colbourne;L. Orsini
温度和光周期调节植物和动物的关键健康性状。然而，随着全球变暖导致气温上升，温度线索阈值在较短的光周期内经历，扰乱了许多物种生理、发育和生殖活动的最佳季节时间。了解适应温度和光周期之间的异步性的机制是了解物种如何应对全球变暖的关键。在这里，我们研究了不同光周期长度的大型水蚤对不同光周期长度与温度共生的跨代反应机制，从而评估了早春变暖对其适应性的影响。水蚤利用温度和光周期线索进行时间休眠，并在有性繁殖和无性繁殖之间切换。我们对生物档案中的三个种群进行了跨代共同花园实验，这些种群在过去50年里经历了气温的上升。我们的结果表明，对早春变暖的反应是由塑料和遗传机制之间的复杂相互作用所支撑的，同时也观察到在父母代和子代之间的匹配环境中母体的积极贡献。
Temperature and photoperiod regulate key fitness traits in plants and animals. However, with temperature increase due to global warming, temperature cue thresholds are experienced at shorter photoperiods, disrupting the optimal seasonal timing of physiological, developmental and reproductive events in many species. Understanding the mechanisms of adaptation to the asynchrony between temperature and photoperiod is key to inform our understanding of how species will respond to global warming. Here, we studied the transgenerational mechanisms of responses of the cyclical parthenogenDaphnia magnato different photoperiod lengths co-occurring with warm temperature thereby assessing the impact of earlier spring warming on its fitness.Daphniauses temperature and photoperiod cues to time dormancy, and to switch between sexual and asexual reproduction.Daphnialife cycle offers the opportunity to measure the relative contribution of plastic and genetic responses to environmental change across generations and over evolutionary time. We use transgenerational common garden experiments on three populations ‘resurrected’ from a biological archive experiencing temperature increase over five decades. Our results suggest that response to early spring warming evolved underpinned by a complex interaction between plastic and genetic mechanisms while a positive maternal contribution at matching environments between parental and offspring generation was also observed.