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Open AccessArticle

Fumigant Antifungal Activity via Reactive Oxygen Species of Thymus vulgaris and Satureja hortensis Essential Oils and Constituents against Raffaelea quercus-mongolicae and Rhizoctonia solani

1
Department of Forest Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
2
LG Household & Health Care, Seoul 07795, Korea
3
Forest Insect Pests and Diseases Division, National Institute of Forest Science, Seoul 02455, Korea
4
Research Institute of Agriculture and Life Science, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea
*
Author to whom correspondence should be addressed.
Biomolecules 2019, 9(10), 561; https://doi.org/10.3390/biom9100561
Received: 16 September 2019 / Revised: 30 September 2019 / Accepted: 1 October 2019 / Published: 3 October 2019
(This article belongs to the Special Issue Perspectives of Essential Oils)
In this study, the fumigant antifungal activity of 10 Lamiaceae plant essential oils was evaluated against two phytopathogenic fungi, Raffaelea quercus-mongolicae, and Rhizoctonia solani. Among the tested essential oils, thyme white (Thymus vulgaris) and summer savory (Satureja hortensis) essential oils exhibited the strongest fumigant antifungal activity against the phytopathogenic fungi. We analyzed the chemical composition of two active essential oils and tested the fumigant antifungal activities of the identified compounds. Among the tested compounds, thymol and carvacrol had potent fumigant antifungal activity. We observed reactive oxygen species (ROS) generation in two fungi treated with thymol and carvacrol. Confocal laser scanning microscopy images of fungi stained with propidium iodide showed that thymol and carvacrol disrupted fungal cell membranes. Our results indicated that ROS generated by thymol and carvacrol damaged the cell membrane of R. querqus-mongolicae and R. solani, causing cell death. View Full-Text
Keywords: Thymus vulgaris; Satureja hortensis; antifungal activity; reactive oxygen species; thymol; carvacrol Thymus vulgaris; Satureja hortensis; antifungal activity; reactive oxygen species; thymol; carvacrol
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Kim, J.-E.; Lee, J.-E.; Huh, M.-J.; Lee, S.-C.; Seo, S.-M.; Kwon, J.H.; Park, I.-K. Fumigant Antifungal Activity via Reactive Oxygen Species of Thymus vulgaris and Satureja hortensis Essential Oils and Constituents against Raffaelea quercus-mongolicae and Rhizoctonia solani. Biomolecules 2019, 9, 561.

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