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AM fungus improves the competitiveness of a native plant against an invasive plant under moderate soil P supply

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Abstract

Background

Alien invasive plants have severely threatened the invaded habitats' structural stability and species diversity. The positive impacts of arbuscular mycorrhizal (AM) fungi on the successful invasion of some alien plants have been well documented, whereas soil phosphorus (P) frequently affects AM fungi benefits. Nevertheless, how soil P availability affects AM fungal function and then shifts the competitive direction of congeneric invasive and native plants remains unclear.

Methods

A pot experiment was conducted. Specifically, the AM fungus treatments were inoculation or non-inoculation with Claroideoglomus etunicatum; the P addition treatments included three different rates of P supply; the competition styles contained intraspecific competition of invasive Eupatorium adenophorum and congeneric native Eupatorium lindleyanum respectively and interspecific competition when the two plant species were grown together. Plant biomass and nutrients were analyzed.

Results

The results showed that AM fungus promoted the growth and nutrients of E. adenophorum and E. lindleyanum. P addition decreased the mycorrhizal response of the two species under intraspecific competition but increased the mycorrhizal responses of E. lindleyanum under interspecific competition. The relative yield and competitive aggressivity showed that E. lindleyanum had significantly greater competitiveness than E. adenophorum. AM fungus further improved the competitive aggressivity of E. lindleyanum under moderate P addition, while it did not influence the competitive aggressivity in biomass of the two species under low and high P conditions.

Conclusion

AM fungus enhances the competitiveness of a native plant over an invasive plant with a moderate soil P supply.

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Data availability

All data generated or analyzed during this study are included in this article (and its supplementary information files).

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (NSFC: 32260268), the Science and Technology Project of Guizhou Province [(2021) General-455], the Guizhou Hundred-level Innovative Talents Project [Qian-ke-he platform talents (2020) 6004], the Natural Science Project of Guizhou Minzu University [GZMUZK (2022) YB14], and the Scientific research project of Department of Water Resources of Guizhou Province [(2023) KT202313].

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Authors and Affiliations

Authors

Contributions

Yuejun He designed this research. Tingting Xia and Kaiping Shen conducted this experiment and collected data. Xu Han, Bangli Wu, Ying Zhao, Hongchun Chen, Yan Zhao, Xihong Yang, Menglin Lei and Jiahao Xiao analyzed the data. Tingting Xia wrote the first draft of the manuscript. Yun Guo and Danmei Chen revised the manuscript. All authors contributed advice to improving this manuscript.

Corresponding author

Correspondence to Yuejun He.

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Responsible Editor: Jan Jansa.

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Xia, T., Shen, K., Guo, Y. et al. AM fungus improves the competitiveness of a native plant against an invasive plant under moderate soil P supply. Plant Soil 492, 541–556 (2023). https://doi.org/10.1007/s11104-023-06199-w

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  • DOI: https://doi.org/10.1007/s11104-023-06199-w

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