Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/8300
Título: Avaliação de óleos essenciais e extratos de Lavandula SPP. no controlo de microrganismos
Autor: Jorge, Rita Eduardo
Orientador: Oliveira, Maria Helena Mendes da Costa Ferreira Correia de
Xavier, Generosa Maria Manso Teixeira
Palavras-chave: Lavandula stoechas subsp. luisieri
Lavandula pedunculata
essential oils
extracts
antimicrobial activity
Data de Defesa: 2014
Editora: ISA/UL
Citação: Jorge, R.E. - Avaliação de óleos essenciais e extratos de Lavandula SPP. no controlo de microrganismos. Lisboa: ISA, 2014, 61 p.
Resumo: The Portuguese flora is very rich in aromatic and medicinal plants, among which are Lavandula stoechas subsp. luisieri and L. pedunculata. The present study was aimed to evaluate the potential antimicrobial activity of five plant extracts and essential oils (EO) obtained from these species, with respect to human and plant pathogens. The EO were extracted from dried material by hydrodistillation and the extracts by a solvent system of increasing polarity. To evaluate the activity of samples against human pathogens the microdilution method was used and determined the values of minimum inhibitory concentration (MIC) at different concentrations: 7.5, 15.5, 31, 62.5, 125, 250 and 500 μg/mL. Results were considered positives for MIC values < 100 μg/mL. Lavandula species showed different antimicrobial properties, attributed to differences in the chemical composition of the respective EO and extracts. For phytopathogenic bacteria a similar procedure was followed. Regarding the fungi, the activity of EO and extracts was evaluated by the disc diffusion method on solid medium inoculated with spore suspensions or mycelial discs at sample concentration of 1 mg/mL and 2 mg/mL, respectively. None of the plant pathogens was inhibited. This study tends to confirm the use of EO and plant extracts to control different types of microbial pathogens
Descrição: Mestrado em Engenharia Agronómica - Proteção de Plantas - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/8300
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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