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Influence of rice cultivars on soil bacterial microbiome under elevated carbon dioxide

机译：二氧化碳升高下水稻品种对土壤细菌微生物组的影响

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摘要

Purpose Elevated CO2 concentration (eCO(2)) may stimulate plant growth and influence the soil microbial community, but questions remain for whether microbial responses to elevated CO2 would vary by different CO2-responsive plants. We thus attempted to elaborate the changes of soil microbiome to different rice cultivars under the eCO(2) condition.Materials and methods Two rice cultivars, i.e., the CO2-tolerant cultivar, Wuyunjing23 (WYJ23), and the CO2-sensitive one, Yandao 6 (YD6), were grown under eCO(2) and ambient CO2 (aCO(2)) conditions. The contents of dissolved organic carbon (DOC) and nitrogen (DON) in soil were measured. Real-time qualitative PCR (qPCR) and high-throughput sequencing techniques were employed to characterize the bacterial community. Furthermore, co-occurrence network analysis was applied to reveal the ecological interactions among bacterial taxa.Results and discussion No significant differences were found among all treatments in terms of bacterial population, alpha-diversity indices, and bacterial community structure. However, the topological parameters of ecological networks highlighted the distinct co-occurrence patterns among treatments. YD6 under eCO(2) led to more links, lower modularity, and greater centralization degree compared to that under aCO(2). Opposite trends of those parameters were observed for WYJ23 under eCO(2) compared to that under aCO(2). Besides, more Proteobacteria and Acidobacteria served as keystone taxa in the CO2-sensitive cultivar treatments, compared to those in WYJ23, implying the different influences of rice cultivars on the microbial ecological network.Conclusions Different rice cultivars under eCO(2) did not influence the alpha- and beta-diversity of the soil bacterial community, but changed the co-occurrence network of the community. More attention should be paid to the assembly mechanisms of the soil microbial microbiome when evaluating the impacts of productive crops on the soil-plant ecosystem under the eCO(2) condition(..)
机译：目的升高的CO2浓度（eCO（2））可能会刺激植物生长并影响土壤微生物群落，但是仍然存在这样的问题，即微生物对升高的CO2的反应是否会因不同的CO2响应植物而有所不同。因此，我们试图阐明在eCO（2）条件下土壤微生物组对不同水稻品种的变化。材料与方法两种耐CO2的水稻品种，WuJing23（WYJ23）和对CO2敏感的水稻，烟道6（YD6）在eCO（2）和环境CO2（aCO（2））条件下生长。测量土壤中溶解有机碳（DOC）和氮（DON）的含量。实时定性PCR（qPCR）和高通量测序技术被用来表征细菌群落。此外，通过共现网络分析揭示了细菌类群之间的生态相互作用。结果与讨论所有处理之间在细菌种群，α-多样性指数和细菌群落结构方面均未发现显着差异。但是，生态网络的拓扑参数突出了处理之间不同的共现模式。与aCO（2）下相比，eCO（2）下的YD6导致更多的链接，更低的模块化和更高的集中度。与在aCO（2）下相比，在eCO（2）下观察到WYJ23这些参数的相反趋势。此外，与WYJ23相比，在对CO2敏感的栽培品种中，更多的变形杆菌和酸性细菌可以作为关键分类群，这表明水稻品种对微生物生态网络的影响是不同的。土壤细菌群落的α-和β-多样性，但改变了群落的共生网络。在eCO（2）条件下评估生产性作物对土壤植物生态系统的影响时，应更加注意土壤微生物组的组装机制。

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  • 来源
    《Journal of soil & sediments》 |2019年第5期|2485-2495|共11页
  • 作者

    Xu Jiangbing; Zhang Jianwei; Zhu Chunwu; Zhu Jianguo; Lin Xiangui; Fe Youzhi;

  • 作者单位

    Nanjing Univ Informat Sci & Technol, Sch Appl Meteorol, Int Ctr Ecol Meteorol & Environm, Nanjing 210044, Jiangsu, Peoples R China|Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China;

    Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    16S rRNA gene; Co-occurrence network; Free air carbon dioxide enrichment; Rice cultivar;

    机译：16S rRNA基因;共现网络;空气中二氧化碳富集;水稻品种;

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