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Background and Aims <p><i>Osmanthus fragrans</i> is a traditional fragrant plant, widely used in the garden and spice industries. Temperature is an important environmental factor affecting the survival and distribution of <i>O. fragrans</i>. Analyzing the variations in rhizosphere soil environment and bacterial communities across different seasons and cold-tolerant <i>O. fragrans</i> cultivars could help develop strategies to enhance the cold resistance of <i>O. fragrans</i> through soil microorganisms.</p> Methods <p>We collected rhizosphere soil samples from different <i>O. fragrans</i> cultivars across seasons. Through soil physicochemical and bacterial community analyses, we identified the multifaceted effects of seasonal and cultivars variations on the soil environment of <i>O. fragrans.</i></p> Results <p>Both cultivar and season significantly altered the physicochemical properties of <i>O. fragrans</i> rhizosphere soil. The composition and diversity of the bacterial community in the rhizosphere soil were also affected by cultivar and seasons, but different bacterial taxa exhibited distinct response patterns. Notably, cultivar and seasonal variations affected core microbial species and co-occurrence network in the rhizosphere. The ‘DHDG’ cultivar and spring samples demonstrated particularly greater network complexity and stability. Climate factors, soil pH, total nitrogen, and soil organic matter were identified as the primary drivers shaping rhizosphere community structure and potential functional changes.</p> Conclusions <p>This study highlights that the rhizosphere microenvironment of <i>O. fragrans</i> is strongly influenced by both cultivar type and seasonal variation. Changes in climate and soil conditions drive shifts in bacterial community assembly and functional potential in the rhizosphere. These findings provide valuable insights for enhancing cold resistance in <i>O. fragrans</i> through microbial-mediated strategies.</p>

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Seasonal variations in rhizosphere bacterial communities and potential functions of different Osmanthus fragrans cultivars

  • 期刊论文

  • 发表日期：

    2025年8月16日

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  • Xiaofeng Zhang,
  • Liu Wang,
  • Jiahui Wang,
  • Gongwei Chen,
  • Tingting Shi,
  • Yuanzheng Yue,
  • Lianggui Wang,
  • Xiulian Yang

摘要

Background and Aims

Osmanthus fragrans is a traditional fragrant plant, widely used in the garden and spice industries. Temperature is an important environmental factor affecting the survival and distribution of O. fragrans. Analyzing the variations in rhizosphere soil environment and bacterial communities across different seasons and cold-tolerant O. fragrans cultivars could help develop strategies to enhance the cold resistance of O. fragrans through soil microorganisms.

Methods

We collected rhizosphere soil samples from different O. fragrans cultivars across seasons. Through soil physicochemical and bacterial community analyses, we identified the multifaceted effects of seasonal and cultivars variations on the soil environment of O. fragrans.

Results

Both cultivar and season significantly altered the physicochemical properties of O. fragrans rhizosphere soil. The composition and diversity of the bacterial community in the rhizosphere soil were also affected by cultivar and seasons, but different bacterial taxa exhibited distinct response patterns. Notably, cultivar and seasonal variations affected core microbial species and co-occurrence network in the rhizosphere. The ‘DHDG’ cultivar and spring samples demonstrated particularly greater network complexity and stability. Climate factors, soil pH, total nitrogen, and soil organic matter were identified as the primary drivers shaping rhizosphere community structure and potential functional changes.

Conclusions

This study highlights that the rhizosphere microenvironment of O. fragrans is strongly influenced by both cultivar type and seasonal variation. Changes in climate and soil conditions drive shifts in bacterial community assembly and functional potential in the rhizosphere. These findings provide valuable insights for enhancing cold resistance in O. fragrans through microbial-mediated strategies.