The inhibitory effect of Pleurotus ostreatus on the growth of Aspergillus niger and the production of Ochratoxin A. and isolated from apples

The objective of this study was to explore and diagnose the mycotoxic from apple in order to decreases their toxic effects. The results showed the two species of fungi which included , Aspergillus niger and Rhizopus stolonifer. It was found that there was a significant appearance of A. niger, followed by Rhizopus stolonifer. With a frequency of 84.21% and 15.79% respectively, while the rate Percentage of appearance was 100% and 37.5%, respectively. . The results of chemical analysis of TLC showed that 5 isolates out of the16 tested isolates of A. niger wrer a produced of Ochratoxin A with a production rate of 31.25%. The results also showed that Pleurotus ostreatus was high resistance against A. niger the nutritional medium Potato Sucrose Agar , Where covered the entire area of the dish and were not allowed to A. niger to grow, and showed a degree of contrast (1). The results showed that Pleurotus ostreatus was in high efficient reducting the Ochratoxin A, which was produced by A. niger. The efficiency of the reduction in the Spectrophotometer was varied with the treatment of nine and six tablets of the fungus 100 ml-1 of the PD medium significantly in the reduction of 74.75% Respectively, compared to the treatment of three tablets of the fungus 100 ml -1 from the center of PD with reduction rate of 61.90%.