Abstract The importance of soil microbes as a whole has long been recognized in plant invasions, yet relatively few studies address the relative importance of different soil microbial guilds. To this end, we collected soils that were conditioned by plants in 18 pairs of invaded and uninvaded communities and conducted an assemblage experiment (invasive Solidago canadensis and five native plants) via four inoculations. Arbuscular mycorrhizal fungi (AMF) increased the growth of S. canadensis and its competitive suppression (the potential of S. canadensis to suppress its neighboring native plants). The positive feedback effect of AMF on S. canadensis was stronger than their negative feedback effect on five native plants. Solidago canadensis grew larger and had lower competitive suppression in conspecific soils than heterospecific soils. These findings suggest that AMF play a crucial role in driving S. canadensis invasions and also highlight that conspecific and heterospecific soils contribute to the success of S. canadensis through different pathways.

中文翻译：

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丛枝菌根真菌有助于解释加拿大一枝黄花的入侵成功

摘要 土壤微生物作为一个整体在植物入侵中的重要性早已得到认可，但相对较少的研究涉及不同土壤微生物群的相对重要性。为此，我们收集了 18 对入侵和未入侵群落中由植物调节的土壤，并通过四次接种进行了组合实验（入侵加拿大一枝黄花和五种本地植物）。丛枝菌根真菌 (AMF) 增加了加拿大 S. canadensis 的生长及其竞争性抑制（S. canadensis 抑制其邻近本地植物的潜力）。AMF对S. canadensis的正反馈作用强于对5种本土植物的负反馈作用。与异种土壤相比，加拿大一枝黄花在同种土壤中生长得更大并且具有更低的竞争抑制。