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Background and aims <p>Alien plants often form dominant communities in invaded habitats where there would be strong intraspecific competition among the invader populations. But roles of arbuscular mycorrhizal fungi (AMF) in invasive plants’ intraspecific competition, especially in different invasion time has been rarely reported.</p> Methods <p>In this study, greenhouse experiments were conducted to assess the differential effects of AMF on the growth and competitiveness between early invader (EI) and late invader (LI) of an invasive plant <i>Sphagneticola trilobata</i>.</p> Results <p>The results showed that the mycorrhizal colonization rate of EI was significantly higher than that of LI. AMF significantly promoted the aboveground growth, but showing no significant impacts on the root growth in EI. In contrast, AMF significantly inhibited aboveground growth, but enhanced root growth in LI. Furthermore, AMF inoculation also significantly enhanced the aboveground relative interaction intensity (RII) of EI and the belowground RII of LI, but inhibited the LI’s aboveground RII and the EI’s belowground RII. AMF also significantly enhanced neighborhood interaction intensity (NInt) of LI on EI, but decreased NInt of EI on LI. This study highlights the completely different roles of AMF on intraspecific competitors, which is LI had facilitation effect on EI, while EI suppressed the growth of LI with the interaction with AMF.</p> Conclusions <p>These findings contribute to a deeper understanding of the community dynamics underlying the sequence of invasive colonization and provide a theoretical basis for developing control and management strategies for invasive plants in future.</p>

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First come, more benefit: roles of arbuscular mycorrhizal fungi in the intraspecific competition of an invasive clonal plant

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Shanshan Qi,
  • Francis Kwaku Nkansah,
  • Xinqi Jiang,
  • Hu’anhe Xiong,
  • Mengting Yan,
  • Ying Li,
  • Guangqian Ren,
  • Wei Wei,
  • Weiguo Fu,
  • Zhicong Dai,
  • Daolin Du

摘要

Background and aims

Alien plants often form dominant communities in invaded habitats where there would be strong intraspecific competition among the invader populations. But roles of arbuscular mycorrhizal fungi (AMF) in invasive plants’ intraspecific competition, especially in different invasion time has been rarely reported.

Methods

In this study, greenhouse experiments were conducted to assess the differential effects of AMF on the growth and competitiveness between early invader (EI) and late invader (LI) of an invasive plant Sphagneticola trilobata.

Results

The results showed that the mycorrhizal colonization rate of EI was significantly higher than that of LI. AMF significantly promoted the aboveground growth, but showing no significant impacts on the root growth in EI. In contrast, AMF significantly inhibited aboveground growth, but enhanced root growth in LI. Furthermore, AMF inoculation also significantly enhanced the aboveground relative interaction intensity (RII) of EI and the belowground RII of LI, but inhibited the LI’s aboveground RII and the EI’s belowground RII. AMF also significantly enhanced neighborhood interaction intensity (NInt) of LI on EI, but decreased NInt of EI on LI. This study highlights the completely different roles of AMF on intraspecific competitors, which is LI had facilitation effect on EI, while EI suppressed the growth of LI with the interaction with AMF.

Conclusions

These findings contribute to a deeper understanding of the community dynamics underlying the sequence of invasive colonization and provide a theoretical basis for developing control and management strategies for invasive plants in future.