Co-occurrence of fungi, aflatoxins, ochratoxins A and fumonsins in date palm fruits ofSaudi Arabia

摘要

A survey was carried out to obtain data on the occurrence of most popular mycotoxins (aflatoxins, ochratoxin-A and fumonisins) from date palm in region of Riyadh in Saudi Arabia. The samples were analyzed for alfatoxins by immune affinity column (IAC) clean-up with liquid chromatography and fluorescence detection. 100% of samples showed variable incidence of fungal contamination. The predominant fungi present in date palm samples were Penicillium spp., Aspergillus niger, and Rhizopus spp. The results showed that Fusarium spp. was detected only in five varieties (Khalas, Roshodiah, Khadry, Meinifi and Helwa) with frequency occurrence between 2 and 20% and the fungus F. salani was the most species isolation. The results also indicated that the highest concentration for aflatoxins total was 5.92ng/g found in Sulaj variety and the aflatoxin B1 was 5.1ng/g. On the other hand, the Degelat Noor and Dekhaini varieties appeared free from aflatoxins contamination. The highest concentration of ochratoxin-A and fumonisin B1 was 1.9 ng/gm and 184.5ng/g found in Meneifi and Hulwa variety respectively.