Microbial community structure and its temporal changes in Panax ginseng C.A.Maye rhizospheric soils monocultured for different years

论文摘要

Panax ginseng C.A.Maye is a perennial herb belonging to the family Araliaceae and is highly valued in traditional Chinese medicine.Commercial ginseng is mainly obtained by artificial cultivation.However,fields used for P.ginseng production are typically replanted every 20-30 years.Continuous monoculture of P.ginseng can result in a significant decline in the biomass and quality of the ginseng.The continuous cropping obstacle of P.ginseng is a bottleneck that restricts the sustainable development of ginseng industry.The main cause of soil deterioration during continuous cropping of P.ginseng may be the disturbance of soil microbial community mediated by the ecological effects of root exudates.In order to determine the effects of P.ginseng monoculture on the rhizospheric soil microbiota community,high throughput sequencing was used to examine changes in the structure and composition of soil microbiota community with the P.ginseng rhizosphere soil in vorious cultivation ages.The results revealed a distinct separation between the primitive soil sample which was not planted ginseng and the rhizosphere soils of four-year（FOS）,five-year（FIS） and six-year（SS） ginseng.By the Alpha-diversity analyzing,it was found that the species of fungi in ginseng rhizosphere soils were significantly higher than primitive soil,monoculture of ginseng led to a significant increase in relative abundance of Ascomycota,reaching 42-66% in different years,particularly pathogens such as Fusarium and Cylindrocarpon,but a significant decrease in the relative abundance of Russula,while the content of Russula,Basidiomycota was the highest in the forest soil without ginseng cultivation,accounting for more than 50% of all fungi in the soil.Tree map analysis showed that the similarity of fungal community between six-year Ginseng Soil and five-year ginseng soil was high,while that between forest soil and ginseng soil was low.The species of bacteria in ginseng rhizosphere soils were slightly less than primitive soil,the relative abundance of Verrucomicrobia,Thaumarchaeota,Chloroflexi and Firmicutes were significant increased,while the dominant bacteria of primitive soil was Proteobacteria,accounting for 36-50% of all bacteria in soil.Overall,the microbiota community in the SS and FIS was similarity,but the similarity of ginseng rhizosphere soils and primitive soil was lower,indicating the community structure of microbiota changed greatly with planted of ginseng.This study demonstrated that monoculture of Panax ginseng could alter the microbiota community of ginseng rhizosphere soils,and with the augmentation of ginseng cultivation ages,the fungal diversity increased and the bacterial diversity decreased,and particularly the content of pathogenic fungi markedly raised.

论文目录

文章来源

类型: 国内会议

作者: ZHAO Xuesong,WANG Jiao,CHEN Honglei,YANG Chenxi,SONG Wangfang,ZHOU Yifa

来源: 中国第九届植物化感作用学术研讨会 2019-09-19

年度: 2019

分类: 基础科学,农业科技

专业: 生物学,农业基础科学,农艺学,农作物

单位: School of Sciences,Liaoning Technical UniversitySchool of Life Sciences,Northeast Normal UniversityCollege of Environmental Science and Engineering,Liaoning Technical University

分类号: S567.51;S154.3

页码: 60

总页数: 1

文件大小: 17k

下载量: 12

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