生物多样性 ›› 2025, Vol. 33 ›› Issue (12): 25340.  DOI: 10.17520/biods.2025340  cstr: 32101.14.biods.2025340

• 研究报告: 微生物多样性 • 上一篇    下一篇

古尔班通古特沙漠灌木叶际细菌群落的多样性特征及其驱动因素

罗春生1,2,3,4, 张俊2,3,4*, 金华1*, 尹翔正2,3,4,5, 张元明2,3   

  1. 1. 大连民族大学环境与资源学院, 辽宁大连 116600; 2. 中国科学院新疆生态与地理研究所干旱区生态安全与可持续发展全国重点实验室, 乌鲁木齐 830011; 3. 中国科学院新疆生态与地理研究所新疆干旱区生物多样性保育与应用重点实验室, 乌鲁木齐 830011; 4. 新疆维吾尔自治区林业科学院治沙研究所新疆林草治沙与沙产业重点实验室, 乌鲁木齐 830063; 5. 内蒙古农业大学林学院, 呼和浩特 010000
  • 收稿日期:2025-08-26 修回日期:2025-11-12 接受日期:2025-12-10 出版日期:2025-12-20 发布日期:2026-01-09
  • 通讯作者: 张俊, 金华

Diversity characteristics and driving factors of phyllosphere bacterial communities in shrubs of the Gurbantunggut Desert

Chunsheng Luo1,2,3,4, Jun Zhang2,3,4*, Hua Jin1*, Xiangzheng Yin2,3,4,5, Yuanming Zhang2,3   

  1. 1 College of Environment and Resources, Dalian Minzu University, Dalian, Liaoning 116600, China 

    2 State Key Laboratory of Ecological Safe and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China 

    3 Xinjiang Key Laboratory of Biodiversity Conservation and Application in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China 

    4 Xinjiang Key Laboratory of Forest, Grassland, Desertification Mitigation and Desert Land Development, Institute of Sand Control, Xinjiang Academy of Forestry, Urumqi 830063, China 

    5 College of Forestry, Inner Mongolia Agricultural University, Hohhot 010000, China

  • Received:2025-08-26 Revised:2025-11-12 Accepted:2025-12-10 Online:2025-12-20 Published:2026-01-09
  • Contact: Jun Zhang, Hua Jin

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摘要： 叶际微生物对宿主植物健康、适应性及生态系统稳定性具有重要作用, 但目前针对温带荒漠灌木叶际微生物群落多样性特征及其驱动机制的研究仍较为匮乏。本研究以古尔班通古特沙漠3种典型荒漠灌木(淡枝沙拐枣(Calligonum leucocladum)、膜果麻黄(Ephedra przewalskii)和白梭梭(Haloxylon persicum))为研究对象, 基于16S rRNA高通量测序技术, 结合主坐标分析(principle coordinate analysis, PCoA)、冗余分析和零模型构建等方法, 系统解析了叶际细菌群落的多样性特征及确定性与随机性过程对其群落构建的相对贡献。结果表明: 宿主植物身份和地理位置均显著影响叶际细菌群落的多样性和结构(P < 0.05), 其中宿主身份的解释度(R2 = 0.766)显著高于地理位置(R2 = 0.046); 植物功能性状对叶际细菌群落结构变异的独立贡献(9.39%–47.45%)远高于气候因素(0%–0.38%)和土壤性质(1.23%–6.21%); 随机性过程(75.53%–95.24%)主导叶际细菌群落构建, 生态漂变(60.01%–91.43%)是其核心驱动力; 共现网络分析显示, 不同荒漠灌木叶际细菌群落的网络结构紧密, 并且存在显著的网络模块化特征。本研究揭示了干旱区荒漠灌木叶际细菌群落的多样性特征及构建机制, 强调了宿主功能性状的关键作用, 为全球气候变化背景下荒漠生态系统的适应性管理策略制定提供理论依据和实践指导。

关键词: 荒漠灌木, 叶际细菌, 群落多样性, 群落构建, 植物功能性状, 共现网络

Abstract

Aims: Phyllosphere microorganisms play a crucial role in host plant health, adaptability, and ecosystem stability. However, research on the diversity characteristics and driving mechanisms of phyllosphere microbial communities in temperate desert shrubs remains limited. 

Methods: This study focused on three typical desert shrubs (Calligonum leucocladum, Ephedra przewalskii, and Haloxylon persicum) in the Gurbantunggut Desert. Using 16S rRNA high-throughput sequencing technology, combined with principle coordinate analysis (PCoA), redundancy analysis, and null models, we systematically examined the diversity characteristics of phyllosphere bacterial communities and the relative contributions of deterministic and stochastic processes to their assembly. 

Results: The results showed that both host plant identity and geographic location significantly influenced the diversity and structure of phyllosphere bacterial communities (P < 0.05), with host identity explaining a substantially higher proportion of the variance (R² = 0.766) compared to geographic location (R² = 0.046). The independent contribution of plant functional traits to the variation in phyllosphere bacterial community structure (9.39%–47.45%) was far greater than that of climatic factors (0%–0.38%) and soil properties (1.23%–6.21%). Stochastic processes (75.53%–95.24%) dominated the assembly of phyllosphere bacterial communities, with ecological drift (60.01%–91.43%) being the core driving force. Co-occurrence network analysis revealed tightly connected network structures and significant modularity features in the phyllosphere bacterial communities of different desert shrubs. 

Conclusion: This study elucidates the diversity characteristics and assembly mechanisms of phyllosphere bacterial communities in arid desert shrubs, highlighting the key role of host functional traits, and provides theoretical foundations and practical guidance for adaptive management strategies of desert ecosystems under global climate change.

Key words: desert shrubs, phyllosphere bacteria, community diversity, community assembly, plant functional traits, co-occurrence network

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