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<p>Tree species colonized by ectomycorrhiza (ECM) and arbuscular mycorrhiza (AM) fungi varyingly influence microbial populations in afforestation sites, subsequently affecting the ecological benefits of forest soil. Mycorrhizal hyphae are crucial for the absorption, storage, and exchange of nutrients. However, the relationship between microbial diversity, soil nutrients, and mycorrhizal types across different ecological niches of hyphae remains incompletely understood. In this study, we employed high-throughput DNA sequencing technology to analyze microbial diversity isolated from three ecological niches (endosphere, rhizosphere, and bulk soil) in plantations of <i>Larix gmelinii</i> (ECM trees) and <i>Fraxinus mandshurica</i> (AM trees). Our findings revealed that <i>L. gmelinii</i> exhibited a higher abundance of mycorrhizal fungi and plant growth-promoting fungi (PGPF) communities in the bulk soil compared to the endosphere. Additionally, <i>L. gmelinii</i> recruited more ectomycorrhizal fungi and PGPF communities from the bulk soil into the rhizosphere than <i>F. mandshurica</i>. The relationship between PGPF and plant growth-promoting rhizobacteria demonstrated a stronger synergy in <i>L. gmelinii</i> compared to <i>F. mandshurica</i>. The changes in the fungal communities of the two mycorrhizal plants were closely associated with soil total nitrogen levels.</p>

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Impact of Tree Mycorrhizal Types on Microbial Populations and Soil Ecological Benefits in Afforestation Sites

  • 期刊论文

  • 发表日期：

    2025年5月20日

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  • Qingyu Wei,
  • Yunlong Zhang,
  • Chunze Wu,
  • Xing Wei

摘要

Tree species colonized by ectomycorrhiza (ECM) and arbuscular mycorrhiza (AM) fungi varyingly influence microbial populations in afforestation sites, subsequently affecting the ecological benefits of forest soil. Mycorrhizal hyphae are crucial for the absorption, storage, and exchange of nutrients. However, the relationship between microbial diversity, soil nutrients, and mycorrhizal types across different ecological niches of hyphae remains incompletely understood. In this study, we employed high-throughput DNA sequencing technology to analyze microbial diversity isolated from three ecological niches (endosphere, rhizosphere, and bulk soil) in plantations of Larix gmelinii (ECM trees) and Fraxinus mandshurica (AM trees). Our findings revealed that L. gmelinii exhibited a higher abundance of mycorrhizal fungi and plant growth-promoting fungi (PGPF) communities in the bulk soil compared to the endosphere. Additionally, L. gmelinii recruited more ectomycorrhizal fungi and PGPF communities from the bulk soil into the rhizosphere than F. mandshurica. The relationship between PGPF and plant growth-promoting rhizobacteria demonstrated a stronger synergy in L. gmelinii compared to F. mandshurica. The changes in the fungal communities of the two mycorrhizal plants were closely associated with soil total nitrogen levels.