文献类型： 外文期刊

作者： Bi, Jingjing ¹ ; Song, Alin ¹ ; Li, Shidong ² ; Chen, Mingshun ³ ; Wang, Yanan ⁴ ; Wang, Sai ¹ ; Si, Zhiyuan ¹ ; Wang, Enzhao ¹ ; Zhang, Jiayin ¹ ; Asante-Badu, Bismark ¹ ; Njyenawe, Marie Claire ¹ ; Zhang, Qianru ¹ ; Xue, Piao ⁵ ; Fan, Fenliang ¹ ;

作者机构： 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Key Lab Plant Nutr & Fertilizer, Minist Agr & Rural Affairs, South Zhongguancun St 12, Beijing 100081, Peoples R China

2.Chinese Acad Agr Sci, Inst Plant Protect, Beijing 100193, Peoples R China

3.Kansas State Univ, Dept Entomol, Manhattan, KS 66506 USA

4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

5.Univ Tokyo, Grad Sch Arts & Sci, Tokyo 1138654, Japan

关键词： Nitrogen levels; Plant disease; Phytohormones; Pathogens; FUNGuild

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：5.509； 五年影响因子：5.678 ）

ISSN： 0929-1393

年卷期： 2022 年 175 卷

页码：

收录情况： SCI

摘要： Nitrogen (N) is an essential element for plant growth and development. N levels in soil may also impact plant disease occurrence. However, the physiological and microbial mechanisms between N levels in soil and plant disease occurrence are not quite clear at present. In this study, we examined the impact of seven urea levels (0 to 800 mg kg(-1) soil) on the physiology of tomato (Lycopersicon esculentum) and fungal disease occurrence. Our results showed that the disease incidence and index caused by a tomato early blight pathogen (Alternaria alternata) increased with increasing N levels. The disease index and percentage of disease incidence were positively correlated with N content, indole-3-acetic acid (IAA) and salicylic acid (SA) in plants, but negatively correlated with fungal community diversity. In addition to pathogens (A. alternata) that cause known early blight, 39 other fungal taxa were also identified as plant pathogens in tomato roots, leaves, and soil, the dominant putative pathogens included Ceratobasidiaceae sp., Fusarium oxysporum, Macrophomina phaseolina, Nectriaceae sp., Podosphaera fusca and Trichoderma viride. N levels affected the distribution and dynamics of the fungal pathogen community, such as the abundance of Fusarium oxysporum increased by 33% on roots from days 25 to 35. Our results demonstrated that plants undergo complex disease risk from different pathogens under different N levels, highlighting a need for proper N management, and integration of nutrient management as a disease control approach for sustainable agricultural production.