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Background and aims <p>Arbuscular mycorrhizal fungi (AMF) and <i>Bacillus</i> can benefit the growth and enhance the defensive ability of invasive plants to endure stresses. Their function may vary with the change in soil phosphorus (P) level, thus affecting the growth and defensive compounds of exotic plants. However, the related mechanism has been overlooked.</p> Methods <p>Pot cultures of invasive <i>Flaveria bidentis</i> and native <i>Eclipta prostrata</i> were grown in monoculture or mixed culture under four soil P levels. Mono-inoculation with <i>Rhizoglomus intraradice</i> or <i>Bacillus megaterium</i> and co-inoculation with both of them were carried out to evaluate their effects on the growth of plants under four soil P levels.</p> Results <p>The influence of <i>R. intraradices</i> and <i>B. megaterium</i> on the growth of <i>F. bidentis</i> was depended on soil P levels, which was associated with the effects of P levels on <i>R. intraradices</i> colonization and <i>B. megaterium</i> density. Co-inoculation with two inoculants enhanced the biomass of <i>F. bidentis</i> by increasing the contents of carbon (C), nitrogen (N), and P in the mixed culture relative to that in monoculture at different P levels. Compared with the monoculture, the flavonoids concentration of <i>F. bidentis</i> in the mixed culture decreased at four P levels, which was different from that of <i>E. prostrata</i>.</p> Conclusions <p>The synergistic effect between <i>R. intraradices</i> and <i>B. megaterium</i> promoted the competitive growth ability of <i>F. bidentis</i> by inhibiting the growth of <i>E. prostrata</i> under different soil P levels, indicating that AM fungi-bacteria interaction enhanced the competitive ability of <i>F. bidentis</i>.</p>

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Effect of Rhizoglomus intraradices and symbiotic Bacillus megaterium on the competitive growth of Flaveria bidentis under different soil phosphorus levels

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Ruiyue Wang,
  • Jun Li,
  • Yaning Jia,
  • Jieyu Yang,
  • Jihua Wu,
  • Fengjuan Zhang

摘要

Background and aims

Arbuscular mycorrhizal fungi (AMF) and Bacillus can benefit the growth and enhance the defensive ability of invasive plants to endure stresses. Their function may vary with the change in soil phosphorus (P) level, thus affecting the growth and defensive compounds of exotic plants. However, the related mechanism has been overlooked.

Methods

Pot cultures of invasive Flaveria bidentis and native Eclipta prostrata were grown in monoculture or mixed culture under four soil P levels. Mono-inoculation with Rhizoglomus intraradice or Bacillus megaterium and co-inoculation with both of them were carried out to evaluate their effects on the growth of plants under four soil P levels.

Results

The influence of R. intraradices and B. megaterium on the growth of F. bidentis was depended on soil P levels, which was associated with the effects of P levels on R. intraradices colonization and B. megaterium density. Co-inoculation with two inoculants enhanced the biomass of F. bidentis by increasing the contents of carbon (C), nitrogen (N), and P in the mixed culture relative to that in monoculture at different P levels. Compared with the monoculture, the flavonoids concentration of F. bidentis in the mixed culture decreased at four P levels, which was different from that of E. prostrata.

Conclusions

The synergistic effect between R. intraradices and B. megaterium promoted the competitive growth ability of F. bidentis by inhibiting the growth of E. prostrata under different soil P levels, indicating that AM fungi-bacteria interaction enhanced the competitive ability of F. bidentis.