Organic mulch can suppress litchi downy blight through modification of soil microbial community structure and functional potentials

文献类型： 外文期刊

第一作者： Xu, Dandan

作者： Xu, Dandan;Qiao, Fang;Lan, Cuizhen;Xu, Dandan;Xi, Pinggen;Jiang, Zide;Ling, Jinfeng;Peng, Aitian;Zeng, Yani;Zhang, Jianfan;Li, Pingdong

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关键词： Organic mulch; Litchi plantation; Bacterial and fungal communities; Antimicrobial; Litchi downy blight

期刊名称：BMC MICROBIOLOGY （ 影响因子：4.465； 五年影响因子：4.818 ）

ISSN： 1471-2180

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background Organic mulch is an important management practice in agricultural production to improve soil quality, control crop pests and diseases and increase the biodiversity of soil microecosystem. However, the information about soil microbial diversity and composition in litchi plantation response to organic mulch and its attribution to litchi downy blight severity was limited. This study aimed to investigate the effect of organic mulch on litchi downy blight, and evaluate the biodiversity and antimicrobial potential of soil microbial community of litchi plantation soils under organic mulch. Results Organic mulch could significantly suppress the disease incidence in the litchi plantation, and with a reduction of 37.74% to 85.66%. As a result of high-throughput 16S rRNA and ITS rDNA gene illumine sequencing, significantly higher bacterial and fungal community diversity indexes were found in organic mulch soils, the relative abundance of norank f norank o Vicinamibacterales, norank f Vicinamibacteraceae, norank f Xanthobacteraceae, Unclassified c sordariomycetes, Aspergillus and Thermomyces were significant more than that in control soils. Isolation and analysis of antagonistic microorganism showed that 29 antagonistic bacteria strains and 37 antagonistic fungi strains were unique for mulching soils. Conclusions Thus, we believe that organic mulch has a positive regulatory effect on the litchi downy blight and the soil microbial communities, and so, is more suitable for litchi plantation.

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