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The effect of zinc and phytic acid on the incorporation of 1-14C-Acetate into aflatoxin by resting mycelia ofaspergillus parasiticus

Die Wirkung von Zink und Phytinsäure auf den Einbau von 1-14C-Acetat in Aflatoxine durch ruhendes Mycel vonAspergillus parasiticus

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Zusammenfassung

Die Wirkung des Zinks und der Phytinsäure auf den Einbau von 1-14C-Acetat in Aflatoxine durch ruhendes Mycel wurde studiert. Wenn verschiedene Mengen von ZnSO4 angewendet wurden, um deren Einfluß auf den Einbau von 1-14C-Acetat in Aflatoxine zu studieren, so wurde gefunden, daß die spezifische Radioaktivität bei einem Maximum von 10 mmol-ZnSO4 lag. Bei diesen Konzentrationen waren die Verbindungen in der spezifischen Radioaktivität der Aflatoxine B1 und B2 bzw. G1 und G2 74,61 bzw. 29,66%. Andererseits hatte die Phytinsäure einen hemmenden Einfluß auf den Einbau von 1-14C-Acetat. Diese Beobachtungen stimmen mit der Tatsache überein, daßAspergillus parasiticus auf Sojabohnen als Nährboden unfähig ist, Aflatoxine zu produzieren.

Summary

The effect of zinc and phytic acid on [1-14C]-acetate incorporation into aflatoxins by resting mycelium was studied. When different levels of ZnSO4 were used to study its effect on the incorporation of [1-14C]-acetate into aflatoxins, it was found that the specific radioactivity incorporation into aflatoxins was maximum at the level of 10 mM-ZnSO4. At this concentration the change in the specific radioactivities of aflatoxins B1 + B2 and aflatoxins G1 + G2 were + 74.61% and +29.66%, respectively. On the other hand, phytic acid had an inhibitory effect on the incorporation of [] l-14C]-acetate. These observations have been correlated in order to find out why soyabean is unable to produce aflatoxins byAspergillus parasiticus.

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  1. Department of Biochemistry Vallabhbhai Patel Chest Institute, University of Delhi, 110007, Delhi, India

    S. K. Gupta & T. A. Venkitasubramanian

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  1. S. K. Gupta
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  2. T. A. Venkitasubramanian
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Gupta, S.K., Venkitasubramanian, T.A. The effect of zinc and phytic acid on the incorporation of 1-14C-Acetate into aflatoxin by resting mycelia ofaspergillus parasiticus . Z Lebensm Unters Forch 159, 107–111 (1975). https://doi.org/10.1007/BF01135786

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