scholarly journals Chemical composition and acaricidal activity of the essential oils from Vitex agnus-castus L. (Verbenaceae) and selected monoterpenes

2016 ◽  
Vol 88 (3) ◽  
pp. 1221-1233 ◽  
Author(s):  
Roberta C.S. Neves ◽  
Claudio A.G. da Camara
2017 ◽  
Vol 9 (6) ◽  
pp. 2204-2213
Author(s):  
José C. S. de Oliveira ◽  
Claudio A. G. da Camara ◽  
Roberta C. S. Neves ◽  
Priscilla S. Botelho

Author(s):  
Fatima El Kamari ◽  
Amal Taroq ◽  
Yassine El Atki ◽  
Imane Aouam ◽  
Badiaa Lyoussi ◽  
...  

Objective: The aim of the current study is to determine the chemical composition and evaluate antibacterial activity of Vitex agnus-castus L. (VAC) essential oils against some bacteria causing nosocomial infections in the neonatal and intensive care rooms at the university hospital center of Fez Morocco. Methods: The phytochemical screening of essential oils was determined using gas chromatography (GC) and GC-mass spectrometry analysis. The antibacterial test was evaluated against Gram-positive bacteria Staphylococcus aureus and Gram-negative bacteria species (Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Proteus mirabilis) using disc diffusion method. Results: Twenty-nine components were identified in the fruits’ oil representing 93.1% of total oil. The major components in the fruits oil are 1,8-cineole (11.6%), α-thujene (9.3%), phyllocladene (8.2%), α-pinene (7.9%), caryophyllene (5.9%), and cubenol (5%). Furthermore, 28 components were identified in the leaf essential oil. The main component was caryophyllene (9.5%), followed by 1,8-cineole (8.7%), manoyl oxide (7.3%), eugenyl acetate (7.1%), phyllocladene (6.8%), and α-pinene (5.2%). Antibacterial activity of both oils showed a strong activity against nosocomial bacteria tested. Conclusion: Essential oils of Moroccan VAC could be exploited as natural drugs for bacteria, especially those who have acquired resistance to conventional antibiotics.


2020 ◽  
Vol 32 (4) ◽  
pp. 316-322
Author(s):  
Erlânio Oliveira De Sousa ◽  
Aldilene Da Silva Lima ◽  
Suzana Gomes Lopes ◽  
Lívio Martins Costa-Junior ◽  
José Galberto Martins Da Costa

2016 ◽  
Vol 44 (2) ◽  
pp. 466-471 ◽  
Author(s):  
Melih YILAR ◽  
Yusuf BAYAN ◽  
Abdurrahman ONARAN

The purpose of this study was to assess the effectiveness of essential plant oils from Vitex agnus-castus L. (VAC) and Myrtus communis L. against the plant pathogens, Fusarium oxysporum f. sp. radicis-lycopersici (Sacc.) W.C. Synder & H.N. Hans, Rhizoctonia solani J.G. Kühn., Sclerotinia sclerotiorum (Lib.) de Bary and Verticillium dahliae Kleb., and to determine the chemical composition of the compounds in these essential oils. GC/MS analysis was identified 25 different compounds in VAC essential oil, while the main compounds were determined as Eucalyptol (17.75%), β-Caryophyllene (13.21%) and Spathulenol (10.41%). On the other hand, the essential oil of M. communis, consisted of 16 different compounds which were Eucalyptol (49.15%), Myrtenol (19.49%) and α-Pinene (8.38%) being its main compounds. An assessment of antifungal activity was performed under in vitro conditions. Plant pathogens were inoculated onto Petri dishes (60 mm) containing PDA medium (10 mL/Petri-1), and plant essential oils were applied at concentrations of 0.5, 1, 1.5, 2, 5 and 10 (μL/Petri-1) into the 5 mm diameter wells opened on the Petri dish surface. After that, the Petri dishes incubated at 22±2 °C. The results of this study, the essential oil of M. communis, at a dose of 10 μL/ Petri, inhibited the 100% mycelium growth of V. dahliae, S. sclerotiorum and R. solani. The highest dose of VAC essential oil was also 100% inhibited V. dahliae and S. sclerotiorum. The LC50 and LC90 values of M. communis and VAC essential oil calculated for V. dahliae, FORL, S. sclerotiorum and R. solani. This plant extracts were shown by in vitro conditions to be potential antifungal agents.


Author(s):  
LARA P. RICARTE ◽  
GABRIELI P. BEZERRA ◽  
NIRLA R. ROMERO ◽  
HORLANDO C. DA SILVA ◽  
TELMA L.G. LEMOS ◽  
...  

2010 ◽  
Vol 22 (3) ◽  
pp. 279-282 ◽  
Author(s):  
Wendel J.T. Pontes ◽  
Juliana M.O. Silva ◽  
Cláudio A.G. da Camara ◽  
Manoel G.C. Gondim-Júnior ◽  
José V. Oliveira ◽  
...  

2007 ◽  
Vol 37 (1) ◽  
pp. 103-109 ◽  
Author(s):  
Wendel José Teles Pontes ◽  
José Cândido Guerra de Oliveira ◽  
Cláudio Augusto Gomes da Câmara ◽  
Adelmo C. H. R. Lopes ◽  
Manoel Guedes Correia Gondim Júnior ◽  
...  

Essential oils from leaves and fruits of Protiumheptaphyllum collected in Tamandaré beach Pernambuco/Brazil were analysed by GC/MS and tested for toxicity and repellent effect against the two spotted spider mite (Tetranychus urticae). The major constituent identified in the fruits was alpha-terpinene (47.6 %) whereas oil from leaf contained mainly sesquiterpenes such as 9-epi-caryophyllene (21.4 %), trans-isolongifolanone (10.7 %) and 14-hydroxi-9-epi-caryophyllene (16.7 %). The fruit oil was found to be more effective against the mite when compared to the leaf oil. Both showed mortality properties and oviposition deterrence in higher concentration (10 µl.l-1 air), but only the essential oil from fruits induced repellence on T. urticae.


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