[Study on allelopathic effect of ginseng root exudates against its root callus].

Objective: To study the effect of ginseng root exudates against its root callus and provide theoretic basis for allelopathic mechanism and continuous cropping obstacle.

Methods: We cultured ginseng root callus with MS culture medium whose concentration was equal to soil concentration of 80, 40, 20, 10, 5 gDW/mL and chose the optimum concentration for further study on allelopathic effect of ginseng root exudates against its root callus content of MDA and DNA. The root callus which was treated at different time was observed with paraffin slice method.