Susceptibility of some varieties of date fruits to support the production of aflatoxins:Analysis by high performance liquid chromatography
2004
Aba-Alkhail, A.R.A. | Ibrahim, G.H.,Al-Qassem Univ., Buraidah (Saudi Arabia)Dept. ofMicrobiology
Six varieties of date palm (Phoenix dactylifera L.) namely Nabtet-Aly, Sakei, Succary,Rashody, Rothana and Menephy of the most widely grown in Al-Qassem region, Saudi Arabiawere selected to survey the microflora present in these varieties and studied its susceptibilityto support the production of aflatoxins. The total number of spores present in the fruits ofthese varieties were in descending order: Menephy greater than Succary greater thanRashody greater than Sakei greater than Nabtet-Aly = Rothana. The most abundant genusfound on dates was Aspergillus. Also, similar degrees of microflora growth were found whenfruits were inoculated for 5 and 10 days with either A. flavus or A. parasiticus. The datefruits of all the tested varieties were able to support the production of different forms ofaflatoxin such as B1, B2, G1 and G3. The contents of aflatoxin G2 produced by either A. flavusor A. parasiticus were higher than the other forms. Menephy and Sakei varieties containedless levels of the total aflatoxins when inoculated with either A. flavus or A. parasiticus,respectively. It is suggested that care must be exercised to avoid the poor conditions duringthe storage of dates.
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