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Molecules 2012, 17(9), 10459-10469; doi:10.3390/molecules170910459

Fumigant Antifungal Activity of Myrtaceae Essential Oils and Constituents from Leptospermum petersonii against Three Aspergillus Species

Division of Forest Insect Pests and Diseases, Korea Forest Research Institute, Seoul 130-712, Korea
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Received: 11 July 2012 / Revised: 16 August 2012 / Accepted: 27 August 2012 / Published: 3 September 2012
(This article belongs to the Section Natural Products)
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Abstract

Commercial plant essential oils obtained from 11 Myrtaceae plant species were tested for their fumigant antifungal activity against Aspergillus ochraceus, A. flavus, and A. niger. Essential oils extracted from Leptospermum petersonii at air concentrations of 56 × 10−3 mg/mL and 28 × 10−3 mg/mL completely inhibited the growth of the three Aspergillus species. However, at an air concentration of 14 × 10−3 mg/mL, inhibition rates of L. petersonii essential oils were reduced to 20.2% and 18.8% in the case of A. flavus and A. niger, respectively. The other Myrtaceae essential oils (56 × 10−3 mg/mL) only weakly inhibited the fungi or had no detectable affect. Gas chromatography-mass spectrometry analysis identified 16 compounds in L. petersonii essential oil. The antifungal activity of the identified compounds was tested individually by using standard or synthesized compounds. Of these, neral and geranial inhibited growth by 100%, at an air concentration of 56 × 10−3 mg/mL, whereas the activity of citronellol was somewhat lover (80%). The other compounds exhibited only moderate or weak antifungal activity. The antifungal activities of blends of constituents identified in L. petersonii oil indicated that neral and geranial were the major contributors to the fumigant and antifungal activities.
Keywords: antifungal activity; Myrtaceae essential oil; Leptospermum petersonii; Aspergillus ochraceus; Aspergillus flavus; Aspergillus niger antifungal activity; Myrtaceae essential oil; Leptospermum petersonii; Aspergillus ochraceus; Aspergillus flavus; Aspergillus niger
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Kim, E.; Park, I.-K. Fumigant Antifungal Activity of Myrtaceae Essential Oils and Constituents from Leptospermum petersonii against Three Aspergillus Species. Molecules 2012, 17, 10459-10469.

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