Pumpkin powdery mildew disease severity influences the fungal diversity of the phyllosphere
文献类型： 外文期刊
作者： Zhang, Zhuo 1 ; Luo, Luyun 1 ; Tan, Xinqiu 1 ; Kong, Xiao 3 ; Yang, Jianguo 4 ; Wang, Duanhua 4 ; Zhang, Deyong 1 ; Jin, 1 ;
作者机构： 1.Hunan Acad Agr Sci, Hunan Plant Protect Inst, Changsha, Hunan, Peoples R China
2.Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha, Hunan, Peoples R China
3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing, Peoples R China
4.Hunan Acad Agr Sci, Vegetable Res Inst, Changsha, Hunan, Peoples R China
关键词： Disease severity; Powdery mildew; Illumina MiSeq; Phyllosphere microbiota; Fungal community
期刊名称：PEERJ （ 影响因子：2.984； 五年影响因子：3.369 ）
ISSN： 2167-8359
年卷期： 2018 年 6 卷
页码：
收录情况： SCI
摘要： Phyllosphere microbiota play a crucial role in plant-environment interactions and their microbial community and function are influenced by biotic and abiotic factors. However, there is little research on how pathogens affect the microbial community of phyllosphere fungi. In this study, we collected 16 pumpkin (Cucurbita moschata) leaf samples which exhibited powdery mildew disease, with a severity ranging from L1 (least severe) to L4 (most severe). The fungal community structure and diversity was examined by Illumina MiSeq sequencing of the internal transcribed spacer (ITS) region of ribosomal RNA genes. The results showed that the fungal communities were dominated by members of the Basidiomycota and Ascomycota. The Podosphaera was the most dominant genus on these infected leaves, which was the key pathogen responsible for the pumpkin powdery mildew. The abundance of Ascomycota and Podosphaera increased as disease severity increased from L1 to L4, and was significantly higher at disease severity L4 (P < 0.05). The richness and diversity of the fungal community increased from L1 to L2, and then declined from L2 to L4, likely due to the biotic pressure (i.e., symbiotic and competitive stresses among microbial species) at disease severity L4. Our results could give new perspectives on the changes of the leaf microbiome at different pumpkin powdery mildew disease severity.
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