Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/28553
Título : Thymus vulgaris essential oil and thymol against Alternaria alternata (Fr.) Keissler: effects on growth, viability, early infection and cellular mode of action
Autor: Perina, Fabiano José
Amaral, Douglas C.
Fernandes, Rafael S.
Labory, Claudia Regina Gontijo
Teixeira, Glauco A.
Alves, Eduardo
Palavras-chave: Thymol
Early infection
Mode of action
Ultrastructure
Thymus vulgaris
Alternaria alternata
Publicador: Wiley
Data da publicação: 2015
Referência: PERINA, F. J. et al. Thymus vulgaris essential oil and thymol against Alternaria alternata (Fr.) Keissler: effects on growth, viability, early infection and cellular mode of action. Pest Management Science, Sussex, v. 71, p. 1371 - 1378, 2015.
Abstract: BACKGROUND: In initial assays, Thymus vulgaris essential oil (TEO) has demonstrated activity against several plant-pathogenic fungi and has reduced the fungal diseases to levels comparable with commercial fungicides. Thus, the goal of this work was to identify the mode of action in fungi of TEO and its major compound thymol (TOH) at the cellular level using an ultrastructure approach. RESULTS: TEO from leaves and TOH had minimum inhibitory concentrations (MICs) of 500 and 250 𝛍g mL−1 respectively against A. alternata; under the same conditions, MIC for a commercial fungicide was 1250 𝛍g mL−1. Ultrastructure analysis showed that TOH phenolic substance prevented fungal growth, reduced fungal viability and prevented the penetration in fruits by a cell wall/plasma membrane interference mode of action with organelles targeted for destruction in the cytoplasm. Such mode of action differs from protective and preventive–curative commercial fungicides used as pattern control. CONCLUSION: These findings suggest that TOH was responsible for the antifungal activity of TEO. Therefore, both the essential oil and its major substance have potential for use in the development of new phenolic structures and analogues to control Alternaria brown spot disease caused by Alternaria alternata.
URI: http://onlinelibrary.wiley.com/doi/10.1002/ps.3933/pdf
http://repositorio.ufla.br/jspui/handle/1/28553
Idioma: en_US
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