Influence of Aspergillus niger on growth of Aspergillus flavus and aflatoxin B_1

Objective To study the influence of Aspergillus niger on the growth of Aspergillus flavus and degradation of AFB1.Method Aspergillus niger was co-cultured with Aspergillus flavus and AFB1,respectively;pH,dry weight of mycelium,spores of Aspergillus flavus and content of AFB1 were determined every 3 days.Result Compared with the control group,the number of Aspergillus flavus spores and content of AFB1 were much less in competitive situation.There was a significant difference between the two groups(P0.05) and the rate of inhibition was 68.06% to 91.52%;more-over,AFB1 was reduced when Aspergillus niger was inoculated,with is a significant difference between the two groups(P0.05),and the rate of degradation was 46.19%.Conclusion Aspergillus niger not only can inhibit the growth of Aspergillus flavus and production of AFB1,but also degrade AFB1.