Study on the mechanism of Rb1 regulating antioxidant defense system and endogenous hormones leading to increased virulence of Panax ginseng

Abstract

Ginsenoside Rb1 is an allelopathic self-toxic substance that can affect the growth and development of ginseng. This study investigated whether the application of exogenous Rb1 enhances the pathogenicity of ginseng by regulating the antioxidant system and endogenous hormones. Rb1 can inhibit the growth and development of Panax ginseng by inducing Fusarium oxysporum under three concentrations. At the same time, the activities of four antioxidant enzymes and the contents of three endogenous hormones in the roots of Panax ginseng decreased significantly. Compared with the control group, the incidence of ginseng in different treatment groups was significantly increased and the underground growth was significantly inhibited. In conclusion, exogenous ginsenoside Rb1 with different concentrations can enhance the pathogenicity of ginseng.