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Root stoichiometry explains wheat endophytes and their link with crop production after four decades of fertilization

文献类型： 外文期刊

作者： Ma, Yuying 1 ; Wang, Daozhong 2 ; Guo, Xisheng 2 ; Zhu, Yong-Guan 3 ; Delgado-Baquerizo, Manuel 4 ; Chu, Haiyan 1 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 71 East Beijing Rd, Nanjing 210008, Peoples R China

2.Anhui Acad Agr Sci, Inst Soil & Fertilizer Res, South Nongke Rd 40, Hefei 230031, Peoples R China

3.Chinese Acad Sci, Inst Urban Environm, Key Lab Urban Environm & Hlth, Xiamen 361021, Peoples R China

4.CSIC, Inst Recursos Nat & Agrobiol Sevilla IRNAS, Lab Biodivers & Funcionamiento Ecosistem, Ave Reina Mercedes 10, Seville 41012, Spain

5.Univ Pablo de Olavide, Unidad Asociada CSIC UPO BioFun, Seville 41013, Spain

6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词： Endophytic microbiomes; Long-term fertilization; Wheat roots; Co -occurrence network; Crop production

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：10.753； 五年影响因子：10.237 ）

ISSN： 0048-9697

年卷期： 2022 年 846 卷

页码：

收录情况： SCI

摘要： Fertilization can impact root endophytic microbiomes and food production. However, the impacts of decades of continued fertilization on root microbiomes, and their link with ongoing crop production, remain poorly understood. Here, we used a four decade-long fertilization experiment, including contrasting types of organic and inorganic fertil-ization, to investigate the effects of long-term fertilization on multi-kingdom root endophytic microbiomes, including keystone species (modules within microbial networks), and their indirect associations with the production of wheat, which is one of the most important crops worldwide. We found that long-term inorganic (nitrogen, phosphorus, potas-sium (NPK)) and organic (NPK with straw (NPKS) and NPK with cow manure (NPKM)) fertilization had significant impacts on the community composition of endophytic arbuscular mycorrhizal fungi (AMF), bacteria, and non-mycorrhizal fungi. In addition, compared with NPK fertilization, NPKS and NPKM amendments significantly decreased the microbial network complexity, which was associated with changes in the root iron content. Finally, we identified an important subset of keystone root endophyte species within the microbial network (Module #2), which was positively correlated with wheat yield, and affected by changes in root carbon to phosphorus ratio. This study provides evidence that long-term fertilization can affect keystone root endophytic species in the root microbiome, with implications for food security in an over-fertilized world.

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