文献类型： 外文期刊

作者： Sun, Haifeng ¹ ; Kang, Baoling ¹ ; Chai, Zhi ² ; Sun, Huanhuan ³ ; Du, Huizhi ¹ ; Gao, Jianping ³ ; Feng, Qianjing ² ; Zh ¹ ;

作者机构： 1.Shanxi Univ, Coll Chem & Chem Engn, Taiyuan 030006, Peoples R China

2.Shanxi Univ Tradit Chinese Med, Basic Med Coll, Jinzhong 030619, Peoples R China

3.Shanxi Med Univ, Coll Pharm, Taiyuan 140100, Shanxi, Peoples R China

4.Shanxi Acad Agr Sci, Agr Biotechnol Res Ctr, Taiyuan 030031, Shanxi, Peoples R China

5.China Acad Chinese Med Sci, Natl Resource Ctr Chinese Mat Med, State Key Lab Breeding Base Dao Di Herbs, 16 Nanxiaojie, Beijing 100700, Dongcheng Distr, Peoples R China

关键词： Astragali Radix;Root microbiota;Geographical location;Genotype;Planting pattern

期刊名称：ANNALS OF MICROBIOLOGY （ 影响因子：2.112； 五年影响因子：2.151 ）

ISSN： 1590-4261

年卷期： 2017 年 67 卷 9 期

页码：

收录情况： SCI

摘要： Although the quality of herbal medicine is tightly associated with plant genotype and location, microbial traits of most herbs remain unclear. In this study, bacterial communities residing Astragali Radix, which is derived from Astragalus membranaceus and A. mongholicus roots, have been characterized by automated ribosomal intergenic spacer analysis (ARISA) and pyrosequencing of 16S rRNA amplicons. The samples were collected from four representive locations and differing in genotype and planting pattern. The spatial resolution study by ARISA firstly distinguished between the two anatomically-based parts, the periderm and secondary vascular tissue, demonstrating that microbial communities residing in the former were more diverse and clearly separated by host genotype and location as compared with those residing in the latter. Taxonomic coverage revealed that phyla of Proteobacteria, Planctomycetes and Bacteroidetes dominated the bacterial assemblages across the samples. The community diversity in A. mongholicus was more abundant than it was in A. membranaceus, especially A. mongholicus in Shanxi province of China. In addition, the conventional cultivation exerted consistently negative effects on microbiota complexity when compared with the planting pattern "imitating wild conditions", which was regardless of the host genotype. With the focus on microbiota members in Shanxi, taxa associated with the genotype, geography and planting pattern were finally discriminated and used as indicators for the screening of endophytic bacteria that contain ACC deaminase. Taken together, microbiota should be an important trait of herbal medicines and the periderm should be a specialized niche for microbiota research in medicinal plants.