Differentiation of Aspergillus flavus from A. parasiticus and other closely related species

Transactions of the British Mycological Society Pub Date : 1988-07-01 DOI:10.1016/S0007-1536(88)80010-X

M.A. Klich, J.I. Pitt

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引用次数: 297

Abstract

More than 150 isolates of Aspergillus flavus, A. oryzae, A. parasiticus, A. sojae and A. tamarii from collections around the world were examined independently in two laboratories as unknowns, and data assessed to evaluate a wide range of morphological characters for suitability as taxonomic criteria. Mycotoxin production was also assessed. It was concluded that conidial wall texture was the most effective criterion for distinguishing A. flavus and A. parasiticus. A. flavus has a broad interface with VA. oryzae; therefore, a combination of characters was necessary to separate these two species. Mycotoxin production correlated well with morphological speciation. Only A. flavus and A. parasiticus isolates produced B aflatoxins. Very few A. flavus isolates produced G aflatoxins whereas almost all A. parasiticus isolates did. The A. parasiticus isolates never produced cyclopiazonic acid, but some isolates of A. flavus, A. tamarii and A. oryzae did.

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黄曲霉与寄生蜂及其他近缘种的分化

来自世界各地的150多株黄曲霉、米曲霉、寄生曲霉、大豆曲霉和柽柳曲霉分离株在两个实验室中作为未知菌株进行了独立检测，并对数据进行了评估，以评估广泛的形态特征，以确定其是否适合作为分类标准。还评估了霉菌毒素的产生。结果表明，分生孢子壁结构是区分黄粉姬蜂和寄生姬蜂最有效的判据。a . flavus与VA. oryzae有广泛的界面;因此，需要性状组合来区分这两个物种。霉菌毒素的产生与形态物种形成密切相关。只有黄曲霉和寄生蜂分离株产生黄曲霉毒素。很少黄曲霉分离株产生黄曲霉毒素，而几乎所有寄生蜂分离株都产生黄曲霉毒素。寄生蜂分离株不产生环吡唑酸，但黄曲霉、柽柳和米曲霉分离株产生环吡唑酸。

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