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Distinct planting patterns exert legacy effects on the networks and assembly of root-associated microbiomes in subsequent crops

文献类型： 外文期刊

作者： Dang, Ke 1 ; Ma, Yifan 5 ; Liang, Haofeng 6 ; Fan, Zihan 6 ; Guo, Shuqing 1 ; Li, Zhe 6 ; Li, Hongbing 7 ; Zhang, Suiqi 1 ;

作者机构： 1.Chinese Acad Sci, Res Ctr Soil & Water Conservat & Ecol Environm, Minist Educ, Yangling 712100, Shaanxi, Peoples R China

2.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Shaanxi, Peoples R China

3.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China

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

5.Gansu Acad Agr Sci, Dryland Agr Inst, Lanzhou 730070, Gansu, Peoples R China

6.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China

7.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess Pl, Yangling 712100, Shaanxi, Peoples R China

关键词： Crop rotation; Legacy effects; Root-associated microbiomes; Co-occurrence network; Community assembly

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）

ISSN： 0048-9697

年卷期： 2024 年 946 卷

页码：

收录情况： SCI

摘要： Soil legacy effects from previous crops can significantly influence plant-soil interactions in crop rotations. However, the microbial mechanism underlying this effect in subsequent root-associated compartments remains unclear. We investigated the effects of planting patterns (four-year continuous maize [MM], three-year winter wheat and one-year maize rotation [WM], and three-year potato and one-year maize rotation [PM]) on the microbial composition and structure of root-associated compartments, the effect of distinct crops on subsequent microbial co-occurrence patterns, and the assembly mechanism by which the root-associated compartments (bulk soil, rhizosphere, and roots) in subsequent crops regulate the microbiome habitat. Compared with MM, the relative abundance of Acidobacteria in WM was 29.7 % lower, whereas that of Bacteroidota in PM was 37.9 % higher in all three compartments. The co-occurrence patterns of the microbial communities exhibited varied responses to different planting patterns. Indicator taxon analysis revealed less shared and specific species in the root bacterial and fungal networks. The planting pattern elicited specific responses from modules within bacterial and fungal co-occurrence networks in all three compartments. Moreover, the planting patterns and rootassociated compartments collectively drove the assembly process of root-associated microorganisms. The neutral model showed that, compared with MM, the stochasticity of bacterial assembly decreased under WM and PM but increased for fungal assembly. WM and PM increased the relative effects of the homogenized dispersal of fungal assemblies in roots. We conclude that previous crops exhibit marked legacy effects in the root-associated microbiome. Therefore, soil heritage should not be ignored when discussing microbiome recruitment strategies and co-occurrence patterns in subsequent crops.

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