Co-occurrence patterns of soybean rhizosphere microbiome at a continental scale
Co-occurrence patterns of soybean rhizosphere microbiome at a continental scale
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大陆尺度大豆根际微生物组的共现模式
DOI：
10.1016/j.soilbio.2017.12.011
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发表时间：
2018
影响因子：
9.7
通讯作者：
Wei Gehong
中科院分区：
文献类型：
--
作者：
Zhang Baogang;Zhang Jun;Liu Yao;Shi Peng;Wei Gehong
根际微生物在植物健康和生长中起着重要作用。根际微生物群落的多样性和组成已经得到了很好的研究，但很少有人知道他们的共存模式，特别是在大陆尺度。在此，我们进行了一个基于网络的分析，使用集成的细菌和真菌群落数据集，以描绘中国各地的51个大豆田的土壤和根际微生物群落的共现模式和网络拓扑特征的地理模式。结果表明，根际和非根际土壤微生物网络在结构和组成上存在差异。根际网络与整体网络相比，细菌和真菌之间的联系较少，模块化程度较低，平均路径长度较小;根际全球网络、根际南方网络和根际北方网络的复杂性分别较高和较低。与北方特有网络相比，南方特有网络中的细菌和真菌之间的联系更多。此外，网络拓扑特征的地理格局之间的散装土壤和根际生境，北方和南方地区的差异。土壤pH值对土壤细菌亚网络和根际细菌亚网络的影响最大;土壤镁含量对土壤真菌亚网络的影响最大，与环境因子的相关性较小。鉴于微生物网络可能反映微生物之间的相互作用或小生境共享，这些结果提供了新的见解根际微生物群落的组织。
Rhizosphere microorganisms play important roles in plant health and growth. The diversity and composition of rhizosphere microbial communities have been well studied, but little is known about their co-occurrence patterns, especially at a continental scale. Herein, we performed a network-based analysis using integrated bacterial and fungal community datasets to delineate the co-occurrence patterns of bulk soil and rhizosphere microbiome and the geographic patterns of network topological features in 51 soybean fields across China. Results showed that the microbial networks differed between bulk soil and rhizosphere in terms of structure and composition. Compared with the bulk soil networks, the rhizosphere networks had fewer links between bacteria and fungi, lower modularity, and smaller average path length; the global, southern and northern networks of rhizosphere showed similar, higher and lower complexity, respectively. The southern-specific networks of both bulk soil and soybean rhizosphere had more links between bacteria and fungi compared with the northern-specific networks. Additionally, the geographic patterns of network topological features differed between bulk soil and rhizosphere habitats, northern and southern regions. Bacterial sub-networks of both bulk soil and rhizosphere were most influenced by soil pH; fungal sub-networks were related to fewer environmental factors and most influenced by soil Mg content. Given that microbial networks may reflect interactions or niches shared among microorganisms, these results provide new insights into the organization of rhizosphere microbial communities.