Abstract:

The effects of toxins of four main pathogens of soybean root rot on the permeability of cell membrane, and the effects of the interactions of different toxins, simultaneous inoculation of pathogens and toxins on causing soybean root rot were studied in this paper. The toxicity analysis indicated that the most poisonous is Fusarium oxysporum toxin of them. and the membrane permeability increased while the concentration of it also increased. Orthogonal experiment of four toxins interaction effect on radicle contamination of soybean presented that F. oxysporum toxin may play an important role in the process. The disease of soybean root rot was aggravated when simultaneous inoculation of pathogens and F. oxysporum toxins, and the disease indexes can gained about 10% than no toxins.