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

doi:10.17520/biods.2025340

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 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 接受日期:2025-11-13 出版日期:2025-12-20 发布日期:2026-01-09
通讯作者: * 共同通讯作者：E-mail: zhangjun_09_27@126.com; jhua@dlnu.edu.cn
基金资助:
新疆维吾尔自治区自然科学基金面上项目(2022D01A351);新疆维吾尔自治区自然科学基金重点项目(2022D01D083);新疆维吾尔自治区天山英才-科技创新领军人才项目(2022TSYCLJ0058);新疆维吾尔自治区公益性科研院所基本科研业务经费资助项目(KY2025062);新疆维吾尔自治区“天池英才”计划

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 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 Accepted:2025-11-13 Online:2025-12-20 Published:2026-01-09
Supported by:
Xinjiang Uygur Autonomous Region Natural Science Foundation(2022D01A351);Key Project of Xinjiang Uygur Autonomous Region Natural Science Foundation(2022D01D083);Leading Talents in Sci-Technological Innovation Project of “Tianshan Talent” Training Plan of Xinjiang Uygur Autonomous Region(2022TSYCLJ0058);Basic Research Operating Funds for Public Welfare Research Institutes of Xinjiang Uygur Autonomous Region(KY2025062);Tianchi Talent Introduction Project of Xinjiang Uygur Autonomous Region

1. 附录.pdf(1813KB)

摘要/Abstract

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

罗春生, 张俊, 金华, 尹翔正, 张元明 (2025) 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. 生物多样性, 33, 25340. DOI: 10.17520/biods.2025340.

Chunsheng Luo, Jun Zhang, Hua Jin, Xiangzheng Yin, Yuanming Zhang (2025) Diversity characteristics and driving factors of phyllosphere bacterial communities in shrubs of the Gurbantunggut Desert. Biodiversity Science, 33, 25340. DOI: 10.17520/biods.2025340.

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链接本文: https://www.biodiversity-science.net/CN/10.17520/biods.2025340

https://www.biodiversity-science.net/CN/Y2025/V33/I12/25340

图/表 5

图1 荒漠灌木叶际细菌群落在不同宿主植物和地理位置的α多样性分布特征。Kruskal-Wallis检验结果显示, 不同小写字母表示α多样性指数在不同宿主植物种类和不同地理位置间的显著性差异。Kruskal-Wallis检验结果见附录7和8。植物物种: 白梭梭(Hp)、淡枝沙拐枣(Cl)和膜果麻黄(Ephedra przewalskii, Ep)。地点: S1: 火烧山; S2: 卡拉麦里山自然保护区; S3: 界碑240; S4: 一站; S5: 石西东; S6: 石西南; S7: 石西北。

Fig. 1 Alpha diversity distribution characteristics of phyllosphere bacterial communities in desert shrubs across different host plant and geographic locations. Kruskal-Wallis test results show that different lowercase letters indicate significant differences in alpha diversity indices among different host plant species and geographic locations. Kruskal-Wallis test results see Appendix 7 and 8. Plant species: Hp, Haloxylon persicum; Cl, Calligonum leucocladum; Ep, Ephedra przewalskii. Locations: S1, Huoshaoshan; S2, Karamaili Mountain Nature Reserve; S3, Boundary marker 240; S4, Yizhan; S5, Shixi east; S6, Shixi south; S7, Shixi north.

图2 基于Bray-Curtis距离的不同荒漠灌木叶际细菌群落结构主坐标分析(PCoA)。植物物种: Cl: 淡枝沙拐枣; Ep: 膜果麻黄; Hp: 白梭梭。地点: S1: 火烧山; S2: 卡拉麦里山自然保护区; S3: 界碑240; S4: 一站; S5: 石西东; S6: 石西南; S7: 石西北。

Fig. 2 Principal coordinate analysis (PCoA) of phyllosphere bacterial community structure of different desert shrub species based on Bray-Curtis distance. Hp, Haloxylon persicum; Cl, Calligonum leucocladum; Ep, Ephedra przewalskii. Locations: S1, Huoshaoshan; S2, Karamaili Mountain Nature Reserve; S3, Boundary marker 240; S4, Yizhan; S5, Shixi east; S6, Shixi south; S7, Shixi north.

图3 荒漠灌木叶际细菌群落结构变异的影响因素。(A)冗余分析(RDA)显示叶际细菌群落与环境因素的关系。(B)变差分解(variance partitioning analysis, VPA)显示植物功能性状、气候因子和土壤性质对叶际细菌群落结构变异的解释比例。植物物种: Total: 所有物种; Cl: 淡枝沙拐枣; Ep: 膜果麻黄; Hp: 白梭梭。影响因素: LA: 叶片面积; LDMC: 叶片干物质; LTC: 叶片总碳; SS: 叶片可溶性糖; ST: 叶片淀粉; TNSC: 叶片总非结构性碳水化合物; MAP: 年平均降水量; MAT: 年平均温度; SWC: 土壤含水量; EC: 土壤电导率; STN: 土壤总氮; STP: 土壤总磷; NH4+-N: 土壤铵态氮。值 < 0未展示。

Fig. 3 Factors influencing the variation in phyllosphere bacterial community structure of desert shrubs. (A) Redundancy analysis (RDA) showing the relationship between phyllosphere bacterial communities and environmental factors. (B) Variance partitioning analysis (VPA) showing the proportion of variation in phyllosphere bacterial community structure explained by plant functional traits, climatic factors, and soil properties. Plant species: Total, Total species; Cl, Calligonum leucocladum; Ep, Ephedra przewalskii; Hp, Haloxylon persicum. Influencing factors: LA, Leaf area; LDMC, Leaf dry matter content; LTC, Leaf total carbon; SS, Leaf soluble sugars; ST, Leaf starch; TNSC, Leaf total non-structural carbohydrates; MAP, Mean annual precipitation; MAT, Mean annual temperature; SWC, Soil water content; EC, Soil electrical conductivity; STN, Soil total nitrogen; STP, Soil total phosphorus; NH4+-N, Soil ammonium nitrogen. Values < 0 not shown.

图4 荒漠灌木叶际细菌群落的构建过程。(A)在不同荒漠地理位置上, 3种荒漠灌木叶际细菌群落的β最近分类单元指数(βNTI), 虚线为阈值|2| (> |2|为偏确定性过程, < |2|为偏随机性过程)。Kruskal-Wallis检验结果显示, 不同小写字母表示βNTI在不同宿主植物种类和不同地理位置间的显著性差异。(B)基于零模型分析的确定性过程(同质选择或异质选择)与随机性过程(同质扩散、扩散限制、生态漂变)对微生物群落构建的相对影响。植物物种: Total: 所有物种; Cl: 淡枝沙拐枣; Ep: 膜果麻黄; Hp: 白梭梭。地点: S1: 火烧山; S2: 卡拉麦里山自然保护区; S3: 界碑240; S4: 一站; S5: 石西东; S6: 石西南; S7: 石西北。

Fig. 4 Assembly processes of phyllosphere bacterial communities in desert shrubs. (A) β nearest taxon index (βNTI) of phyllosphere bacterial communities of three desert shrub species across different geographic locations, the dashed line represents the threshold |2| (> |2| indicates predominantly deterministic processes, < |2| indicates predominantly stochastic processes). Kruskal-Wallis test results show that different lowercase letters indicate significant differences in βNTI among different host plant species and geographic locations. (B) Relative contributions of deterministic processes (homogeneous or heterogeneous selection) and stochastic processes (homogenizing dispersal, dispersal limitation, and ecological drift) to microbial community assembly based on null model analysis. Plant species: Total, Total species; Hp, Haloxylon persicum, Cl, Calligonum leucocladum, Ep, Ephedra przewalskii. Locations: S1, Huoshaoshan; S2, Karamaili Mountain Nature Reserve; S3, Boundary marker 240; S4, Yizhan; S5, Shixi east; S6, Shixi south; S7, Shixi north.

图5 荒漠灌木叶际细菌的共线网络。(A)不同荒漠灌木叶际细菌的共现网络, 相同颜色节点代表同一模块。(B)不同荒漠灌木叶际细菌共现网络的网络中心性指标。植物物种: Total: 所有物种; Cl: 淡枝沙拐枣; Ep: 膜果麻黄; Hp: 白梭梭。Kruskal-Wallis检验结果见附录16。

Fig. 5 Co-occurrence networks of phyllosphere bacteria in desert shrubs. (A) Co-occurrence networks of phyllosphere bacteria in different desert shrub species; nodes with the same color belong to the same module. (B) Network centrality metrics of co-occurrence networks in different desert shrub species. Plant species: Total, Total species; Cl, Calligonum leucocladum; Ep, Ephedra przewalskii; Hp, Haloxylon persicum. Kruskal-Wallis test results see Appendix 16.

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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

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

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