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首页> 外文期刊>The New Phytologist >Adaptation at range margins: common garden trials and the performance of Arabidopsis lyrata across its northwestern European range
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Adaptation at range margins: common garden trials and the performance of Arabidopsis lyrata across its northwestern European range

机译：在范围边缘进行适应：普通的花园试验和整个西北欧洲范围的拟南芥的表现

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摘要

Widely distributed species, such as the perennial plant Arabidopsis lyrata, face a range of environmental conditions across space, creating selective pressures for local evolutionary adaptation. The species' fragmented distribution may reduce gene flow, which could either reduce or increase adaptive potential. The substantial variation in phenotypic traits observed across this species' northwestern European range may reflect a combination of plastic responses to environmental conditions, evolutionaryadaptation and nonadaptive genetic differentiation. We conducted multi-site common garden experiments to study differences in plant performance in core and marginal areas. Plants from eight source populations representing the species' full geographic and altitudinal range in northwestern Europe were planted out in Iceland, Sweden, Scotland and Wales. We found evidence of both strong plastic responses and apparently adaptive differentiation in performance. Most evidence for local adaptation was found atrange margins, with the strongest effects on reproductive output. Both biotic and abiotic factors affected performance, especially at range margins. Performance of most plants was best in the Scottish and Swedish common garden sites, in the core of thespecies' distribution. Despite adaptations at range margins, the performance of the species declines at distributional limits, with extreme southern populations looking particularly vulnerable.
机译：分布广泛的物种，例如多年生植物拟南芥，在整个空间中都面临着各种环境条件，从而为局部进化适应创造了选择性压力。物种的零散分布可能会减少基因流，这可能会降低或增加适应性潜力。在该物种西北欧洲范围内观察到的表型性状的显着变化可能反映了对环境条件，进化适应和非适应性遗传分化的塑性响应的组合。我们进行了多站点公共花园实验，以研究核心和边缘地区植物性能的差异。在冰岛，瑞典，苏格兰和威尔士种植了来自八个来源种群的植物，这些植物代表了该物种在整个北欧的地理和海拔范围。我们发现了强烈的塑性反应和明显的适应性差异表现的证据。多数地方适应的证据被发现在范围的边缘，对生殖产出的影响最大。生物因素和非生物因素都会影响性能，尤其是在范围范围内。在该物种分布的核心部分，大多数植物的表现在苏格兰和瑞典的公共花园中表现最好。尽管在范围边缘进行了适应，但该物种的性能在分布极限处下降，南部极端种群似乎特别脆弱。

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