入侵植物-丛枝菌根真菌（AMF）互作关系是影响外来植物入侵性的重要机制之一。氮和磷是植物与AMF需要的基本资源，因此氮和磷有效性会影响植物与AMF相互作用，但氮磷水平及其组成对入侵植物与AMF互作影响的研究相对较少。本项目以5对入侵植物和同属本地植物为研究对象，通过控制实验和室内分析，研究：(1)氮磷水平和比例对入侵植物和本地植物与AMF互作的影响；(2)不同氮磷处理下入侵植物和本地植物根系分泌物代谢物质差异；(3)根系分泌物代谢物质对AMF生物活性的作用。本项目通过比较氮磷耦合对入侵植物与AMF互作的影响，根系分泌物代谢物质差异及其对AMF生物活性的影响，回答如下科学问题：(1)入侵植物和本地植物与AMF互作对氮磷水平和比例的响应有何差异？(2)氮磷耦合驱动的入侵植物和本地植物与AMF互作变化是否由根系分泌物调控?本项研究旨在揭示AMF在植物入侵中的作用，阐明入侵植物的适应策略。

Interactions between invasive plants and arbuscular mycorrhizal fungi (AMF) play an important role in enhancing the invasiveness of exotic plant species. Nitrogen (N) and phosphorus (P) are two of the most limiting elements influencing the growth and development for plants and AMF, thus changes in N and P contents may alter the interactions between plants and AMF in terrestrial ecosystems, however, it remains unclear how available N and P and their balance (ecological stoichiometry, N:P) shift AMF associations on native and invasive plants and the associated mechanisms. To address these questions, I will select five pairs of invasive species and their congeneric native species as focal species to examine and compare the variations in plants and AMF association under different N and P conditions and the underlying mechanisms through common garden and laboratory experiments. Specifically, this project will focus on the following contents: (i) the variations in AMF associations with invasive and native plants under different N and P nutrient levels and N:P ratios; (ii) changes in root exudates from invasive and native plants induced by different N and P supplies; (iii) the role of different metabolites in root exudates from invasive and native plants in AMF spore germination. This project will concentrate on the shifts in plant-AMF associations induced by different N and P supplies, differences in metabolites in root exudates and their effects on AMF spore germination, and answer the following questions: (i) do the nutrient levels and ratios of N and P mediate AMF associations with invasive and native plants? (ii) if so, what are the roles of root exudates induced by different N and P supplies in the AMF association with invasive and native plants? The significance of this project is to explore the roles of AMF in plant invasions and to advance our understanding of the adaptive strategies of invasive plants in new ranges.