Comparative Transcriptomic Reveals Greater Similarities in Response to Temperature Than to Invasive Alien Predator in the Damselfly Ischnura elegans Across Different Geographic Scales

IF 3.5 2区 生物学 Q1 EVOLUTIONARY BIOLOGY
Guillaume Wos, Gemma Palomar, Marzena Marszałek, Szymon Sniegula
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Abstract

The impact of global changes on populations may not be necessarily uniform across a species' range. Here, we aim at comparing the phenotypic and transcriptomic response to warming and an invasive predator cue in populations across different geographic scales in the damselfly Ischnura elegans. We collected adult females in two ponds in southern Poland (central latitude) and two ponds in southern Sweden (high latitude). We raised their larvae in growth chambers and exposed them to combination of temperature and a predator cue released by the crayfish Orconectes limosus. When larvae reached the prefinal larval stage, they were phenotyped for traits related to growth and size and collected for a gene expression analysis. High-latitude populations exhibited greater phenotypic and transcriptomic variation than central-latitude populations. Across latitudes and ponds, temperature generally increased growth rate and the predator cue decreased mass, but the effects of temperature were also pond-specific. Comparison of the transcriptomic profiles revealed a greater overlap in the response to temperature across latitudes and ponds, especially for pathway-related oxidative stress and sugar and lipid metabolism. The transcriptomic response to a predator cue and to the interaction temperature × predator cue was more pond-specific and overlapped only for few genes and pathways related to cuticle, development and signal transduction. We demonstrated that central- and high-latitude populations may partially respond through similar mechanisms to warming and, to a lower extent to a predator cue and to the interaction temperature × predator cue. For the predator cue and the interaction, the large fraction of ponds-specific genes suggests local adaptation. We show that high-latitude populations were generally more plastic at the phenotypic and transcriptomic level and may be more capable to cope with environmental changes than their central-latitude counterparts.

Abstract Image

比较转录组显示不同地理尺度的豆娘 Ischnura elegans 对温度的反应比对外来入侵捕食者的反应更相似
全球变化对种群的影响不一定在一个物种的分布范围内是一致的。在此,我们旨在比较豆娘(Ischnura elegans)种群在不同地理尺度上对气候变暖和入侵捕食者线索的表型和转录组反应。我们在波兰南部(中纬度)的两个池塘和瑞典南部(高纬度)的两个池塘中采集了雌性成虫。我们在生长室中饲养它们的幼虫,并将它们置于温度和由小龙虾 Orconectes limosus 释放的捕食者提示的环境中。当幼虫长到前幼体阶段时,我们对它们的生长和体型进行了表型分析,并收集它们进行基因表达分析。与中纬度种群相比,高纬度种群表现出更大的表型和转录组变异。在不同纬度和池塘中,温度通常会提高生长速度,而捕食者的提示会降低质量,但温度的影响也有池塘的特异性。比较转录组图谱发现,不同纬度和池塘对温度的反应有较大的重叠,特别是与氧化应激和糖脂代谢途径有关的反应。对捕食者诱因和温度×捕食者诱因交互作用的转录组反应更具有池塘特异性,仅在与角质层、发育和信号转导有关的少数基因和通路上有重叠。我们的研究表明,中纬度和高纬度种群可能会通过类似的机制对气候变暖做出部分反应,并在较低程度上对捕食者诱因和相互作用温度×捕食者诱因做出反应。对于捕食者诱因和相互作用,池塘特异基因的大量存在表明了当地的适应性。我们的研究表明,高纬度种群在表型和转录组水平上通常更具可塑性,可能比中纬度种群更有能力应对环境变化。
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来源期刊
Evolutionary Applications
Evolutionary Applications 生物-进化生物学
CiteScore
8.50
自引率
7.30%
发文量
175
审稿时长
6 months
期刊介绍: Evolutionary Applications is a fully peer reviewed open access journal. It publishes papers that utilize concepts from evolutionary biology to address biological questions of health, social and economic relevance. Papers are expected to employ evolutionary concepts or methods to make contributions to areas such as (but not limited to): medicine, agriculture, forestry, exploitation and management (fisheries and wildlife), aquaculture, conservation biology, environmental sciences (including climate change and invasion biology), microbiology, and toxicology. All taxonomic groups are covered from microbes, fungi, plants and animals. In order to better serve the community, we also now strongly encourage submissions of papers making use of modern molecular and genetic methods (population and functional genomics, transcriptomics, proteomics, epigenetics, quantitative genetics, association and linkage mapping) to address important questions in any of these disciplines and in an applied evolutionary framework. Theoretical, empirical, synthesis or perspective papers are welcome.
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