| Autor: |
Santos Filho LGAD; Universidade Federal do Delta do Parnaíba, Laboratório de Biotecnologia e Aquicultura Marinha, Avenida São Sebastião, 2819, Bairro Nossa Sra. de Fátima, 64202-020 Parnaíba, PI, Brazil., Reis RBD; Universidade Federal do Delta do Parnaíba, Laboratório de Moléculas Vegetais, Avenida São Sebastião, 2819, Bairro Nossa Sra. de Fátima, 64202-020 Parnaíba, PI, Brazil., Souza ASQ; Universidade Federal do Ceará, Avenida da Universidade, 2853, Bairro Benfica, 60020-181 Fortaleza, CE, Brazil., Canuto KM; Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, Bairro Planalto do Pici, 60511-110 Fortaleza, CE, Brazil., Brito ES; Embrapa Agroindústria Tropical, Rua Dra. Sara Mesquita, 2270, Bairro Planalto do Pici, 60511-110 Fortaleza, CE, Brazil., Castro KNC; Embrapa Tabuleiros Costeiros, Avenida Beira Mar, 3250, Bairro Jardins, 49025-040 Aracaju, SE, Brazil., Pereira AML; Embrapa Tabuleiros Costeiros, Avenida Beira Mar, 3250, Bairro Jardins, 49025-040 Aracaju, SE, Brazil., Diniz FM; Embrapa Caprinos e Ovinos, Rodovia Sobral/Groaíras, km 04, Caixa Postal 71, 62010-970 Sobral, CE, Brazil. |
| Abstrakt: |
There is an increasing interest in essential oils extracted from Verbenaceae plant species as potential sources of biologically active compounds that could provide a starting point for designing novel phyto-pharmaceuticals in aquaculture. The present study was aimed to investigate the chemical composition, antioxidant activity, acute toxicity and antimicrobial effects against Vibrio parahaemolyticus of essential oils extracted from Lippia alba and L. origanoides. Approximately 23 components were identified and quantified by gas chromatography-mass spectrometry and flame ionization detection in each species' essential oil. The most predominant compounds were geranial (23.0%), limonene (17.0%) and neral (15.5%) in L. alba, and thymol (47.2%), p-cymene (16.0%) and E-caryophyllene (11.3%) in L. origanoides. The essential oils have antibacterial activity against Vibrio parahaemolyticus presenting Minimum Inhibitory Concentration (MIC) and Bactericidal Concentration (MBC) values between 156-625 µg mL-1. The essential oils also show antioxidant potential estimated by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assays, presenting IC50 of 60.16 mg mL-1 and 0.22 mg mL-1 for L. alba and L. origanoides EO, respectively. Both oils were classified as toxic to Artemia salina nauplii. Therefore, these essential oils may be useful for controlling pathogenic bacteria important to the aquaculture industry. |
