Influence of exogenous ginsenosides on new forest soil microbial communities
(2.Plant Protection College, Shenyang Agricultural University, Shenyang, China 110866)
【Abstract】Ginsenosides are the main active ingredient and allelochemicals of Panax ginseng, and they play an important role in ginseng growth and in ecological adaptation. To study the influence of ginsenosides on soil microbial communities, the method of given exogenous total ginsenosides of different concentrations was used to study the influence of ginsenosides on new forest soil microbial community, evaluate the change of metabolic activity of microbial community and investigate the ecological effect of ginsenosides on soil microbial community. The results showed that, the exogenous total ginsenosides promoted the metabolic activity of microbial community in new forest soil at different concentrations compared with the control after 10 d and 40 d treatment. After 10 d, except for the Evenness index, all of the other indexes indicated that the functional diversity of the soil microbial community in the new forest firstly increased then decreased with increase of the total ginsenosides concentration. The substrate richness for 0.01 g·L−1 soil treatment was significantly different from that of the control. After 20 d, 30 d and 40 d, except for the evenness index, all of the other indexes indicated that the functional diversity of the soil microbial community in the new forest increased with the total ginsenosides. These results suggested that ginsenosids could change the soil microbial community and microbial metabolic activity, which alter the soil microbial ecology and accordingly affect the growth of ginseng with accumulation of ginsenosides in the soil.
【Keywords】 ginsenoside; soil microbial community; Biolog method;
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