接种黄曲霉的玉米上黄曲霉毒素和曲酸形成过程中的底物消耗

Substrate depletion during formation of aflatoxin and kojic acid on corn inoculated with Aspergillus flavus.

作者信息

Lee L S, Parrish F W, Jacks T J

出版信息

Mycopathologia. 1986 Feb;93(2):105-7. doi: 10.1007/BF00437741.

Abstract

Depletion of sugar and starch carbon sources and concomitant formation of secondary fungal metabolites, aflatoxin and kojic acid, were examined in growing corn inoculated with Aspergillus flavus. Kernels from control and inoculated ears were removed and analyzed after 16, 24, 48, 96 and 168 hrs. Reducing sugars were not significantly different for inoculated and control non-inoculated samples, but after 168 hrs (seven days) starch content was 20% lower in inoculated than in control samples. Kojic acid was detected before aflatoxins formed. Kojic acid, the oxidized product of kojic acid, and aflatoxin were all present in samples two days from inoculation. The formation of this oxidation product may influence toxin levels.

摘要

对接种黄曲霉的生长玉米中糖和淀粉碳源的消耗以及次生真菌代谢产物黄曲霉毒素和曲酸的形成进行了研究。在16、24、48、96和168小时后，从对照穗和接种穗上取下玉米粒并进行分析。接种和未接种对照样品的还原糖没有显著差异，但在168小时（七天）后，接种样品的淀粉含量比对照样品低20%。在黄曲霉毒素形成之前就检测到了曲酸。曲酸的氧化产物以及黄曲霉毒素在接种两天后的样品中均有存在。这种氧化产物的形成可能会影响毒素水平。