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首页> 外文期刊>Plant and Soil >The invasive plant species Centaurea maculosa alters arbuscular mycorrhizal fungal communities in the field
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The invasive plant species Centaurea maculosa alters arbuscular mycorrhizal fungal communities in the field

机译：外来入侵物种Centaurea maculosa改变了田间丛枝菌根真菌的群落

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While several recent studies have described changes in microbial communities associated with exotic plant invasion, how arbuscular mycorrhizal fungi (AMF) communities respond to exotic plant invasion is not well known, despite the salient role of this group in plant interactions. Here, we use molecular methods (terminal restriction fragment length polymorphism analyses based on the large subunit of the rRNA gene) to examine AMF community structure in sites dominated by the invasive mycorrhizal forb, Centaurea maculosa Lam. (spotted knapweed), and in adjacent native grassland sites. Our results indicate that significant AMF community alteration occurs following C. maculosa invasion. Moreover, a significant reduction in the number of restriction fragment sizes was found for samples collected in C. maculosa-dominated areas, suggesting reduced AMF diversity. Extraradical hyphal lengths exhibited a significant, on average 24%, reduction in C. maculosa-versus native grass-dominated sites. As both AMF community composition and abundance were altered by C.maculosa invasion, these data are strongly suggestive of potential impacts on AMF-mediated ecosystem processes. Given that the composition of AMF communities has the potential to differentially influence different plant species, our results may have important implications for site restoration after weed invasion.
机译：尽管最近的一些研究描述了与外来植物入侵相关的微生物群落的变化，但尽管丛集菌根真菌（AMF）群落对外来植物入侵的反应如何，但这一群体在植物相互作用中的重要作用尚不清楚。在这里，我们使用分子方法（基于rRNA基因的大亚基的末端限制性片段长度多态性分析）来检查侵袭性菌根前足（Centaurea maculosa Lam）占主导地位的位点中的AMF群落结构。 （斑节植物），以及邻近的原生草原。我们的结果表明，重大的AMF社区改变发生后黄斑梭菌入侵。此外，发现在斑纹梭菌（C. maculosa）为主地区采集的样品，限制性片段大小的数量显着减少，表明AMF多样性降低。根外菌丝长度表现出明显的减少（平均24％），而斑节对虾与天然草为主的位点相比。由于AMF群落的组成和丰度都因毛C衣藻的入侵而改变，因此这些数据强烈暗示了对AMF介导的生态系统过程的潜在影响。鉴于AMF群落的组成具有对不同植物物种产生差异影响的潜力，因此我们的结果可能对杂草入侵后的场地恢复具有重要意义。

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