Medicinal plants are the basic materials of traditional Chinese medicine. Soil characteristics and microbial contribution play important roles in the growth and product quality of medicinal plants, but the link between them in the rhizosphere of medicinal plants has been overlooked. Accordingly, Mentha haplocalyx, Perilla frutescens, Glycyrrhiza uralensis, and Astragalus membranaceus, four plants used in traditional Chinese medicines, were investigated in this study in order to elucidate bacterial and arbuscular mycorrhizal fungal (AMF) diversity in the rhizosphere and its possible association with soil quality. DGGE-based 16S rRNA and 18S rRNA gene sequencing results indicated that the diversity of both bacteria and AMF in Glycyrrhiza uralensis and Astragalus membranaceus was significantly higher than those in Mentha haplocalyx and Perilla frutescens, suggesting that medicinal plants have different preferences even under the same conditions. In addition, enzymatic activities and nutrition were enhanced in the rhizospheric soil of Mentha haplocalyx and Perilla frutescens, and the correlation among AMF diversity, soil enzymatic activities and nutrition was confirmed using RDA analysis. These results suggest the potential to grow medicinal plants with a reasonable rotation or intercrop in order to maintain long-term continuous soil development.
Microbiology – Springer Journals
Published: Jun 2, 2018
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