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<p><i>Camellia oleifera C.</i> Abel. is a significant economically cultivar in southern China, with numerous improved varieties developed. However, the long-term sustainable development of these varieties under near-natural conditions has been overlooked. We investigated the rhizosphere and non - rhizosphere soils of wild and improved <i>C. oleifera</i> forests in similar habitats. The microbial community structure was analyzed using high-pass sequencing, and stability was assessed through average variations in community composition. Network analysis helped identify key bacteria, and their interactions with soil physicochemical properties were further examined using the Mantel test and PLS-PM structural equation modeling. The physical and chemical properties of soil and fungal community structures varied among different <i>C. oleifera</i> varieties. In the improved <i>C. oleifera</i> forest, <i>Ascomycota</i> and <i>Basidiomycota</i>, the key fungal groups, made up over 80% of the total relative abundance, compared to only about 30% in the wild <i>C. oleifera</i> forest. The improved stand demonstrated better stability (AVD value of 0.604) than the wild stand (AVD value of 0.648). PLS-PM analysis indicated that pH changes positively influenced the stability of the bacterial community but negatively affected soil properties, while the opposite was true for fungi. The soil in improved <i>C. oleifera</i> forests demonstrated a greater capacity for nutrient enrichment through soil microorganisms, making it more prone to acidification than the wild <i>C. oleifera</i> forest. Additionally, it exhibited higher bacterial diversity and lower fungal diversity. pH values and total potassium content are key factors influencing microbial structure and stability.</p>

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Effects of Different Varieties of Camellia oleifera on Soil Microbial Community Structure and Stability

  • 期刊论文

  • 发表日期：

    2025年3月27日

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  • Jia Lu,
  • Jian Li,
  • Pu Peng,
  • Lijun Chen,
  • Zhihui Li,
  • Yuhong Li,
  • Shaofeng Peng

摘要

Camellia oleifera C. Abel. is a significant economically cultivar in southern China, with numerous improved varieties developed. However, the long-term sustainable development of these varieties under near-natural conditions has been overlooked. We investigated the rhizosphere and non - rhizosphere soils of wild and improved C. oleifera forests in similar habitats. The microbial community structure was analyzed using high-pass sequencing, and stability was assessed through average variations in community composition. Network analysis helped identify key bacteria, and their interactions with soil physicochemical properties were further examined using the Mantel test and PLS-PM structural equation modeling. The physical and chemical properties of soil and fungal community structures varied among different C. oleifera varieties. In the improved C. oleifera forest, Ascomycota and Basidiomycota, the key fungal groups, made up over 80% of the total relative abundance, compared to only about 30% in the wild C. oleifera forest. The improved stand demonstrated better stability (AVD value of 0.604) than the wild stand (AVD value of 0.648). PLS-PM analysis indicated that pH changes positively influenced the stability of the bacterial community but negatively affected soil properties, while the opposite was true for fungi. The soil in improved C. oleifera forests demonstrated a greater capacity for nutrient enrichment through soil microorganisms, making it more prone to acidification than the wild C. oleifera forest. Additionally, it exhibited higher bacterial diversity and lower fungal diversity. pH values and total potassium content are key factors influencing microbial structure and stability.