Chemical composition and antifungal properties of commercial essential oils against the maize phytopathogenic fungus Fusarium verticillioides
The aim of the present study was to analyze the chemical composition of Curcuma longa, Pimenta dioica, Rosmarinus officinalis, and Syzygium aromaticum essential oils (EOs) and their antifungal and anti-conidiogenic activity against Fusarium verticillioides. The chemical profile of the EOs was determ...
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Published in: | Revista argentina de microbiología Vol. 53; no. 4; pp. 292 - 303 |
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Main Authors: | , , , , , |
Format: | Journal Article |
Language: | English |
Published: |
Argentina
Elsevier España, S.L.U
01-10-2021
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Subjects: | |
Online Access: | Get full text |
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Summary: | The aim of the present study was to analyze the chemical composition of Curcuma longa, Pimenta dioica, Rosmarinus officinalis, and Syzygium aromaticum essential oils (EOs) and their antifungal and anti-conidiogenic activity against Fusarium verticillioides. The chemical profile of the EOs was determined by GC/MS. The antifungal and anti-conidiogenic activities were evaluated by the agar dilution method. The tested concentrations were 1000ppm, 500ppm, 250ppm and 125ppm. S. aromaticum EO exhibited the highest antifungal effect, followed by P. dioica and to a lesser extent C. longa. The major compounds of these EOs were eugenol (88.70% in S. aromaticum and 16.70% in P. dioica), methyl eugenol (53.09% in P. dioica), and α-turmerone (44.70%), β-turmerone (20.67%), and Ar-turmerone (17.27%) in C. longa. Rosmarinus officinalis poorly inhibited fungal growth; however, it was the only EO that inhibited conidial production, with its major components being 1,8-cineole (53.48%), α-pinene (15.65%), and (−)-camphor (9.57%). Our results showed that some compounds are capable of decreasing mycelial growth without affecting sporulation, and vice versa. However, not all the compounds of an EO are responsible for its bioactivity. In the present work, we were able to identify different major compounds or mixtures of major compounds that were responsible for antifungal and anti-conidiogenic effects. Further experiments combining these pure components are necessary in order to achieve a highly bioactive natural formulation against the phytopathogenic fungus F. verticillioides.
El objetivo del presente estudio fue analizar la composición química de los aceites esenciales (AE) de Curcuma longa, Pimenta dioica, Rosmarinus officinalis y Syzygium aromaticum, y su actividad antifúngica y anti-esporuladora contra Fusarium verticillioides. La composición de los AE se analizó por CG-EM. La actividad antifúngica y anti-esporuladora se evaluó a través del método de dilución en agar usando las siguientes concentraciones: 1.000, 500, 250 y 125ppm. El AE de S. aromaticum demostró el mayor efecto antifúngico, seguido del de P. dioica y, en menor medida, del C. longa. Los compuestos principales de estos AE fueron eugenol (88,70% en S. aromaticum y 16,70% en P. dioica), metil eugenol (53,09% en P. dioica) y α-turmerona (44,70%), β-turmerona (20,67%) y Ar-turmerona (17,27%) en C. longa. El AE de R. officinalis fue el que menor efecto inhibitorio presentó sobre el crecimiento fúngico, pero fue el único que inhibió la producción de conidias; sus principales componentes fueron 1,8-cineol (53,48%), α-pineno (15,65%) y (−)-alcanfor (9,57%). Nuestros resultados demostraron que algunos compuestos son capaces de disminuir el crecimiento del micelio de F. verticillioides sin afectar la esporulación, y vice versa. Sin embargo, no todos los compuestos de un AE son responsables de su bioactividad. En el presente trabajo, pudimos identificar diferentes compuestos o mezclas de compuestos que fueron responsables de los efectos antifúngicos y anti-esporuladores. Se necesitan nuevos experimentos que evalúen la combinación de estos compuestos puros para lograr una formulación bioactiva y de origen natural para el control de F. verticillioides. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0325-7541 |
DOI: | 10.1016/j.ram.2020.12.001 |