Efficacy of the application of a coating composed of chitosan and Origanum vulgare L. essential oil to control Rhizopus stolonifer and Aspergillus niger in grapes (Vitis labrusca L.).

dos Santos, Nereide Serafim Timóteo; Athayde Aguiar, Ana Júlia Alves; de Oliveira, Carlos Eduardo Vasconcelos; Veríssimo de Sales, Camila; de Melo E Silva, Silvanda; Sousa da Silva, Rosana; Stamford, Thayza Christina Montenegro; de Souza, Evandro Leite

dos Santos, Nereide Serafim Timóteo; Athayde Aguiar, Ana Júlia Alves; de Oliveira, Carlos Eduardo Vasconcelos; Veríssimo de Sales, Camila; de Melo E Silva, Silvanda; Sousa da Silva, Rosana; Stamford, Thayza Christina Montenegro; de Souza, Evandro Leite.

Afiliação

dos Santos NS; Laboratory of Food Microbiology, Department of Nutrition, Health Science Center, Federal University of Paraíba, João Pessoa, Brazil.

Food Microbiol ; 32(2): 345-53, 2012 Dec.

Article em En | MEDLINE | ID: mdl-22986200

RESUMO

This study evaluated the efficacy of the combined application of chitosan (CHI) and Origanum vulgare L. essential oil (OV) in the inhibition of Rhizopus stolonifer URM 3728 and Aspergillus niger URM 5842 on laboratory media and on grapes (Vitis labrusca L.) and its influence on the physical, physicochemical and sensory characteristics of the fruits during storage (25 °C, 12 days and 12 °C, 24 days). The application of mixtures of different CHI and OV concentrations (Minimum Inhibitory Concentration - MIC, 1/2 MIC and 1/4 MIC) inhibited the mycelial growth of the test fungi. The application of CHI and OV at sub-inhibitory concentrations (CHI 1/2 MIC + OV 1/4 MIC; CHI 1/2 MIC + OV 1/2 MIC) inhibited spore germination and caused morphological changes in fungal spores and mycelia, in addition to inhibiting the growth of the assayed fungi strains in artificially infected grapes as well as the autochthonous mycoflora of grapes stored at both room and cold temperature. In general, the application of a coating composed of CHI and OV at sub-inhibitory concentrations preserved the quality of grapes as measured by their physical and physicochemical attributes, while some of their sensory attributes improved throughout the assessed storage time. These results demonstrate the potential of the combination of CHI and OV at sub-inhibitory concentrations to control post-harvest pathogenic fungi in fruits, in particular, R. stolonifer and A. niger in grapes.

Assuntos

Aspergillus niger/efeitos dos fármacos; Quitosana/farmacologia; Conservação de Alimentos/métodos; Óleos Voláteis/farmacologia; Origanum/química; Extratos Vegetais/farmacologia; Rhizopus/efeitos dos fármacos; Vitis/microbiologia; Aspergillus niger/crescimento & desenvolvimento; Quitosana/química; Armazenamento de Alimentos; Frutas/química; Frutas/efeitos dos fármacos; Frutas/microbiologia; Testes de Sensibilidade Microbiana; Micélio/efeitos dos fármacos; Micélio/crescimento & desenvolvimento; Óleos Voláteis/química; Extratos Vegetais/química; Rhizopus/crescimento & desenvolvimento; Esporos Fúngicos/efeitos dos fármacos; Esporos Fúngicos/crescimento & desenvolvimento; Vitis/química; Vitis/efeitos dos fármacos

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Aspergillus niger / Rhizopus / Óleos Voláteis / Extratos Vegetais / Vitis / Origanum / Quitosana / Conservação de Alimentos Tipo de estudo: Evaluation_studies Idioma: En Revista: Food Microbiol Assunto da revista: CIENCIAS DA NUTRICAO / MICROBIOLOGIA Ano de publicação: 2012 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido

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