Essential Oil as a Source of Bioactive Constituents for the Control of Insect Pests of Economic Importance in Tunisia

Jemâa, Jouda Médiouni Ben

doi:10.4172/2167-0412.1000158

Cited by 10 publications

(7 citation statements)

References 35 publications

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“…Acids (54.6 %) and alkenes (21.1 %) were found in higher quantities, followed by alcohols (4.5 %), aldehydes (3.7 %) and ketones (2.8 %) (Table 1 ). The compounds with antimicrobial potential as previously reported include n-hexanal, 2-chloro-5-methyl-4-(2-thienyl) pyrimidine, tetradecanoic acid, pentadecanoic acid, (z,z)-6,9-cis-3,4-epoxy-nonadecadiene, 13-octadecenal and azetidine (Gutierrez et al [ 2002 ]; Agoramoorthy et al [ 2007 ]; Deep et al [ 2012 ]; Jemaa [ 2014 ]; Sharma et al [ 2014 ]).…”

Section: Resultsmentioning

confidence: 97%

Antibacterial mechanism of the action of Enteromorpha linza L. essential oil against Escherichia coli and Salmonella Typhimurium

2015

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BackgroundIdentification of natural antibacterial agents from various sources that can act effectively against disease causing foodborne bacteria is one of the major concerns throughout the world. However, the natural antibacterial agents identified to date are primarily effective against Gram positive bacteria, but less effective against Gram negative bacteria. In the present study, Enteromorpha linza L. essential oil (EEO) was evaluated for antibacterial activity against Escherichia coli and Salmonella Typhimurium along with the mode of their antibacterial action.ResultsThe chemical composition of EEO revealed high amounts of acids (54.6 %) and alkenes (21.1 %). EEO was effective against both E. coli and S. Typhimurium. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of EEO for both pathogens were 12.5 mg/ml and 25.0 mg/mL, respectively. EEO at the MIC acted on the loss in viability of E. coli ATCC 43890, which was used as the model system for evaluation of the antibacterial mode of action of EEO against Gram negative bacteria. Significant increase in relative electrical conductivity and K+ concentration were recorded with respect to time, indicating the disruption of tested E. coli cells owing to the controlling effect of EEO. Alternation of the morphology of the cell surface, increase in the release of 260 nm absorbing materials and loss of high salt tolerance were observed.ConclusionsThe results suggest that EEO induced a bactericidal effect via structural membrane damage caused by deposition of EEO in the cytosol or through enzymatic degradation of bacterial intracellular enzymes that resulted in cellular lysis. Accordingly, EEO can be used as a strong natural antibacterial agent against Gram negative foodborne pathogens such as E. coli and S. Typhimurium.Electronic supplementary materialThe online version of this article (doi:10.1186/s40529-015-0093-7) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 97%

Antibacterial mechanism of the action of Enteromorpha linza L. essential oil against Escherichia coli and Salmonella Typhimurium

2015

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“…Fish oils could be delivered in an emulsion form that allows incorporation of sensitive functional ingredients into food without affecting the taste, aroma, or texture [42].…”

Section: Various Extraction Processesmentioning

confidence: 99%

A Review on Major Constituents of Various Essential Oils and its Application

Lingan¹

2018

Transl Med

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The word aromatherapy has become a household term, yet most of the people have no clear knowledge about its application. We would have a query that why plant produce essential oil, the reason is they protect the plant from fungal infection, insect pests and it attracts pollinators. Hence essential oil extracted from plants would be major source for antifungal and insecticidal agents. Studies were reported for the effect of essential oil components on food borne fungi and mycelia growth. The complex chemical constituents of essential oil could be due to the attraction of wide range of pollinators. Even though these volatile chemical constituents are naturally available in plants, extraction process plays the major role for its utilization. When plant material is subjected to steam distillation, the herb material under pressure which softens the cells and allows the essential oil to escape as vapour which was condensed and collected as essential oil. Various extraction processes have been evolved recently for the better yield of essential oil. Micro wave steam distillation and conventional steam distillation was noticed most common in the literature. This review is to discuss about the extraction methods, major constituents of various essential oils, and its application.

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“…Post-harvest treatment is necessary to limit the emergence of adult weevils from the inside of the stored seeds and to comply with market requirements that prohibit the presence of live insects in the grains for export. Biological control has been attempted by using predators and parasitoids (Titouhi et al, 2017) or by applying plant essential oil treatments (Jemâa, 2014; Amzouar et al, 2016; Titouhi et al, 2017). In addition, agronomical and cultural practices have also been applied (Keneni et al, 2011; Mishra et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Identification of Novel Sources of Resistance to Seed Weevils (Bruchus spp.) in a Faba Bean Germplasm Collection

et al. 2019

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Seed weevils (Bruchus spp.) are major pests of faba bean, causing yield losses, and affecting marketability. Our objective was to identify stable sources of resistance to seed weevil attacks, determine the climatic factors that most influenced its incidence and its relationship with some phenological and agronomic traits. The accessions “BOBICK ROD115,” “CÔTE D’OR,” “221516,” and “NOVA GRADISKA” showed increased resistance to penetration and development of larvae. Other accessions such as “QUASAR,” “109.669,” and “223303” exhibited resistance to larval development. The results of this work suggest the presence of different defense mechanisms to seed weevils in faba bean, which in the future could be introgressed in elite cultivars to create resistant varieties and contribute to more sustainable agriculture with less need for pesticides. The temperature, rainfall, and humidity seemed to be the climatic factors most influencing faba bean seed weevil attack while the precocity and the small weight of the seeds were correlated with lower infestation rates in the different experiments.

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Essential Oil as a Source of Bioactive Constituents for the Control of Insect Pests of Economic Importance in Tunisia

Cited by 10 publications

References 35 publications

Antibacterial mechanism of the action of Enteromorpha linza L. essential oil against Escherichia coli and Salmonella Typhimurium

Antibacterial mechanism of the action of Enteromorpha linza L. essential oil against Escherichia coli and Salmonella Typhimurium

A Review on Major Constituents of Various Essential Oils and its Application

Identification of Novel Sources of Resistance to Seed Weevils (Bruchus spp.) in a Faba Bean Germplasm Collection

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