Gendloff E H, Chu F S, Leonard T J
Food Research Institute, University of Wisconsin, Madison 53706.
Experientia. 1992 Jan 15;48(1):84-7. doi: 10.1007/BF01923614.
Two new phenotypes of Aspergillus flavus which exhibit novel patterns of aflatoxin production have been identified and characterized. In one of the new variants of A. flavus, aflatoxin is made in the absence of carbohydrate and concomitantly with growth, without a lag period. A second variant did not produce aflatoxin in the presence or absence of carbohydrate. Chemical mutagenesis of this nonaflatoxigenic strain resulted in mutant strains which produced aflatoxin on carbohydrate-containing media. The aflatoxin production pattern observed in these mutants resembled the typical production scheme, with a lag period through log phase growth.
已鉴定并表征了黄曲霉的两种新表型，它们呈现出黄曲霉毒素产生的新模式。在黄曲霉的一种新变体中，黄曲霉毒素在没有碳水化合物的情况下产生，并且与生长同时进行，没有延迟期。第二种变体在有或没有碳水化合物的情况下都不产生黄曲霉毒素。对这种非产黄曲霉毒素菌株进行化学诱变，得到了在含碳水化合物培养基上产生黄曲霉毒素的突变菌株。在这些突变体中观察到的黄曲霉毒素产生模式类似于典型的产生模式，在对数生长期有一个延迟期。
