玉米污染产黄曲霉毒素真菌后营养成分变化的研究

Study on the changes of nutritional components in maize contaminated by aflatoxin producing fungi

为探讨霉菌污染玉米主要营养成分的变化,利用霉菌污染模拟体系,用产黄曲霉毒素真菌孢子悬浮液处理玉米先玉335和纪元1号7 d。结果表明,产黄曲霉毒素真菌污染后,两个品种玉米的蛋白质含量都降低,氨基酸的总含量也降低。但脂肪含量的变化及总糖含量的变化与品种有关,先玉335的脂肪含量不变,总糖含量增加了38.5%;纪元1号脂肪含量与对照相比降低32.2%,总糖含量降低了44.8%。霉菌污染使两个品种的玉米VA含量都降低,VE和VB2含量都增加,VB1的含量变化与品种有关。霉菌污染玉米会引起营养成分不同程度的变化,这种变化与品种有关,需要进行营养成分和安全性的评价后分级使用。

To explore the changes of the major nutrient contents in maize which was contaminated by Aspergillus sp.,the fungi pollution analog system was used to treat two varieties of maize,Xianyu 335 and Jiyuan NO. 1,for 7 days with aflatoxin producing fungal spore suspension. The results showed that the contents of protein and total amino acid of both varietied of maize were decreased. The changes of fat and sugar were related to maize variety. The content of fat in Xianyu 335 did not change,while total sugar content increased by 38. 5%. The content of fat in Jiyuan NO. 1 decreased by 32. 2% compared with control group,and the total sugar content decreased by 44. 8%. The contents of VAin both varieties of maize were reduced after being treated by the contaminated suspension,while the contents of VEand VB2 increased respectively; the change of content of VB1 was related to maize variety. Fungi changed major nutrient in maize in different degree which was related to maize variety. The contaminated maize should be evaluated for nutrient contents and safety,and graded before being used.