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Promotion of symbiotic interaction between phagotrophic protists and beneficial bacteria, mediated via a balancing of soil nutrients, reduces the incidence of watermelon Fusarium wilt

文献类型： 外文期刊

作者： Tong, Yaoyao 1 ; Wang, Li 1 ; Wu, Chuanfa 1 ; Zhang, Haoqing 1 ; Deng, Yangwu 3 ; Chen, Ming 3 ; Zheng, Xianqing 4 ; Lu, Weiguang 4 ; Chen, Jianping 1 ; Ge, Tida 1 ;

作者机构： 1.Ningbo Univ, State Key Lab Qual & Safety Agroprod, Int Sci & Technol Cooperat Base Regulat Soil Biol, Ningbo 315211, Peoples R China

2.Ningbo Univ, Inst Plant Virol, Key Lab Biotechnol Plant Protect MARA & Zhejiang P, Ningbo 315211, Peoples R China

3.Jiangxi Univ Sci & Technol, Jiangxi Prov Key Lab Environm Pollut Prevent & Con, Ganzhou 341000, Peoples R China

4.Shanghai Acad Agr Sci, Ecoenvironm Protect Inst, Shanghai 201403, Peoples R China

关键词： continuous cropping; co-occurrence network; Fusarium oxysporum; microbial community; nitrogen limitation; soil-borne pathogen

期刊名称：PEDOSPHERE （ 影响因子：7.3； 五年影响因子：6.2 ）

ISSN： 1002-0160

年卷期： 2025 年 35 卷 2 期

页码：

收录情况： SCI

摘要： Elucidating the microbial mechanisms that trigger Fusarium wilt represents a key step in addressing the barriers to sustainable cropping. However, from the perspective of the complete microbiome, the integrated role of soil nutrients and microbial community in the fields with different rates of wilt disease remains unclear. In this study, we examined the potential interrelationships among the nutrients, bacteria, fungi, and protists in rhizospheric soils collected from the fields with watermelon cropping for 7 years at the Zhuanghang Experimental Station of Shanghai Academy of Agricultural Sciences, China. The soils collected were characterized by a high (HW, 81.25%) or low (LW, 6.25%) wilting rate. The HW soil was found to contain a higher abundance of Fusarium oxysporum (1.30-fold higher) than the LW soil, along with higher contents of available phosphorus (1.31-fold higher) and available potassium (2.39-fold higher). In addition, the interkingdom correlation between protists and bacteria in the HW soil was 2.08-fold higher than that in the LW soil. Furthermore, structural equation modeling revealed that an excess of soil available potassium enhanced the predation by potentially detrimental phagotrophic protists on potentially beneficial bacteria. In summary, our findings indicated that a balanced nutrient input and the interactions between protists (Cercomonas and Colpoda) and beneficial bacteria (Bacillus) played important roles in controlling the incidence of watermelon Fusarium wilt.

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