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Nitrogen fertilization modulates rice phyllosphere functional genes and pathogens through fungal communities

文献类型： 外文期刊

作者： Wu, Wei-Feng 1 ; Li, Xin-Yuan 1 ; Chen, Song Can 2 ; Jin, Bing-Jie 3 ; Wu, Chun-Yan 5 ; Li, Gang 3 ; Sun, Cheng-liang 1 ; Zhu, Yong-Guan 1 ; Lin, Xian-Yong 1 ;

作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, MOE Key Lab Environm Remediat & Ecol Hlth, Hangzhou 310058, Peoples R China

2.Univ Vienna, Ctr Microbiol & Environm Syst Sci, Div Microbial Ecol, Vienna, Austria

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

4.CAS Haixi Ind Technol Innovat Ctr Beilun, Zhejiang Key Lab Urban Environm Proc & Pollut Cont, Ningbo 315830, Peoples R China

5.Zhejiang Acad Agr Sci, Hangzhou 310021, Peoples R China

6.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China

关键词： Nitrogen fertilization; Phyllosphere microbiome; Functional genes; Pathogens; Bacterial -fungal interactions

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2024 年 929 卷

页码：

收录情况： SCI

摘要： The phyllosphere is a vital yet often neglected habitat hosting diverse microorganisms with various functions. However, studies regarding how the composition and functions of the phyllosphere microbiome respond to agricultural practices, like nitrogen fertilization, are limited. This study investigated the effects of long-term nitrogen fertilization with different levels (CK, N90, N210, N330) on the functional genes and pathogens of the rice phyllosphere microbiome. Results showed that the relative abundance of many microbial functional genes in the rice phyllosphere was significantly affected by nitrogen fertilization, especially those involved in C fixation and denitrification genes. Different nitrogen fertilization levels have greater effects on fungal communities than bacteria communities in the rice phyllosphere, and network analysis and structural equation models further elucidate that fungal communities not only changed bacterial -fungal inter -kingdom interactions in the phyllosphere but also contributed to the variation of biogeochemical cycle potential. Besides, the moderate nitrogen fertilization level (N210) was associated with an enrichment of beneficial microbes in the phyllosphere, while also resulting in the lowest abundance of pathogenic fungi (1.14 %). In contrast, the highest abundance of pathogenic fungi (1.64 %) was observed in the highest nitrogen fertilization level (N330). This enrichment of pathogen due to high nitrogen level was also regulated by the fungal communities, as revealed through SEM analysis. Together, we demonstrated that the phyllosphere fungal communities were more sensitive to the nitrogen fertilization levels and played a crucial role in influencing phyllosphere functional profiles including element cycling potential and pathogen abundance. This study expands our knowledge regarding the role of phyllosphere fungal communities in modulating the element cycling and plant health in sustainable agriculture.

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