期刊
FEMS MICROBIOLOGY ECOLOGY
卷 93, 期 1, 页码 -出版社
OXFORD UNIV PRESS
DOI: 10.1093/femsec/fiw222
关键词
Monoculture; Heterodera glycines; rhizosphere; community composition; disease suppression
类别
资金
- National Key Basic Research Program of China [973, 2013CB127506]
One of the mechanisms of disease suppressiveness in soils is long-term monoculture (LTM) cropping to dissuade pathogen infestation. However, the linkage between monoculturing and microbial community assemblage in the rhizosphere for disease suppression remains unclear. To decipher this potential relationship, soil samples were collected from seven locations in northeastern China, where LTM (6-38 yr) and short-term monoculture (STM <= 5 yr) cropping of soybean showed varying degrees of soil suppressiveness to the soybean cyst nematode (SCN; Heterodera glycines). Using high-throughput pyrosequencing to examine bacterial 16S rRNA and fungal ITS1 genes, we observed substantial variation in the species richness and relative abundance of taxa in the rhizosphere across different sampling sites. At the genus level, the genera Pseudomonas, Purpureocillium and Pochonia, which have been documented to suppress SCN in earlier studies, were much more abundant in LTM soils than in STM soils. Moreover, the relative abundance of several bacterial and fungal genera with metabolic, biocidal and parasitic activities was also monitored in the rhizosphere. In this study, we provide additional evidence that plants shift the structural and functional composition of the rhizosphere microbiota to suppress pathogen infection in LTM cropping soils.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据