scholarly journals Characterization of Alternaria brassicicola isolated from tomato in Burkina Faso, and use of two essential oils for its control in vitro

2021 ◽  
Vol 17 (11) ◽  
pp. 1371-1379
Author(s):  
SIRIMA Adama ◽  
SEREME Abdoulaye ◽  
KOÏTA Kadidia ◽  
ZIDA Elisabeth ◽  
T. NANA Abel ◽  
...  
Keyword(s):  
Essential Oils ◽  
Burkina Faso ◽  
Alternaria Brassicicola

scholarly journals Trichomes Morphology and Essential Oils Characterization of Field-Growing and In Vitro Propagated Plants of Lavandula pedunculata

2008 ◽  
Vol 14 (S3) ◽  
pp. 148-149 ◽  
Author(s):  
M. Zuzarte ◽  
A.M. Dinis ◽  
C. Cavaleiro ◽  
J. Canhoto ◽  
L. Salgueiro
Keyword(s):  
Chemical Composition ◽  
Antifungal Activity ◽  
Essential Oils ◽  
Vegetative Propagation ◽  
Leaf Trichomes ◽  
Economic Exploitation ◽  
Selection Of

The selection of native Lavandula species and their economic exploitation have increased in the last few years. Micropropagation techniques have been used as an alternative for vegetative propagation allowing the multiplication of selected genotypes and chemotypes. Our previous studies showed that the essential oils of Lavandula pedunculata have an important antifungal activity against dermatophyte strains. Therefore, a new line of investigation concerning the in vitro culture of this species is justified. In the present study we compare the morphology of the leaf trichomes and the chemical composition of their essential oils in both field-growing and in vitro propagated plants.

scholarly journals Antioxidant, Anti-Inflammatory, and Microbial-Modulating Activities of Essential Oils: Implications in Colonic Pathophysiology

2020 ◽  
Vol 21 (11) ◽  
pp. 4152 ◽  
Author(s):  
Enzo Spisni ◽  
Giovannamaria Petrocelli ◽  
Veronica Imbesi ◽  
Renato Spigarelli ◽  
Demetrio Azzinnari ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Essential Oils ◽  
Complex Mixture ◽  
Experimental Colitis ◽  
Anticancer Properties ◽  
Cancer Models ◽  
Oxidative Processes ◽  
Anti Inflammatory

Essential oils (EOs) are a complex mixture of hydrophobic and volatile compounds synthesized from aromatic plants, most of them commonly used in the human diet. In recent years, many studies have analyzed their antimicrobial, antioxidant, anti-inflammatory, immunomodulatory and anticancer properties in vitro and on experimentally induced animal models of colitis and colorectal cancer. However, there are still few clinical studies aimed to understand their role in the modulation of the intestinal pathophysiology. Many EOs and some of their molecules have demonstrated their efficacy in inhibiting bacterial, fungi and virus replication and in modulating the inflammatory and oxidative processes that take place in experimental colitis. In addition to this, their antitumor activity against colorectal cancer models makes them extremely interesting compounds for the modulation of the pathophysiology of the large bowel. The characterization of these EOs is made difficult by their complexity and by the different compositions present in the same oil having different geographical origins. This review tries to shift the focus from the EOs to their individual compounds, to expand their possible applications in modulating colon pathophysiology.

IN VITRO CHARACTERIZATION OF ANTIFUNGAL ACTIVITY OF SELECTED ESSENTIAL OILS

INDIAN DRUGS ◽  
2021 ◽  
Vol 57 (12) ◽  
pp. 61-64
Author(s):  
C. Rath Chandi ◽  
A. Samal
Keyword(s):  
Antifungal Activity ◽  
Essential Oils ◽  
Inhibitory Concentration ◽  
Inhibition Mechanism ◽  
Active Components ◽  
Irreversible Damage ◽  
Antifungal Activities ◽  
In Vitro Characterization

Antifungal activity of seven essential oils was studied primarily against C. albicans and E. floccosum. Four essential oils viz. turmeric, palmarosa, lemongrass and citronella, that revealed better antifungal activities during screening, were characterized further. Minimum Inhibitory concentration (MIC) and phenol coefficient values of the oils ranged between 0.97 to 62.5 µl/ml and 0125 to 0.75 respectively. The oils retained the antifungal activities when treated at high temperature (1000 C for 1h) and pressure (autoclaved), indicating presence of thermostable and barostable active components in them. The oils also resisted sonication (33,000Hz for 30min) and revealed antifungal activities against the two pathogens. Immediate killing of E. floccosum, is attributable to an irreversible damage to the cells. Antifungal activity of these oils as recorded during the study, could be attributable to the membrane inhibition mechanism and was observed to be fungicidal in nature.

Chemical composition, acetylcholine esterase and Anti-bacterial activities of essential oils of Elaeosilenum thapsioides (Desf.) Maire from Algeria

2021 ◽  
Vol 21 ◽  
Author(s):  
Zakaria Barbeche ◽  
Hocine Laouer ◽  
Ramazan Erenler ◽  
Mohamed Hajji ◽  
Guido Flamini ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Inhibitory Activity ◽  
Research Work ◽  
Chemical Characterization ◽  
Diffusion Method ◽  
Aerial Parts ◽  
Ache Inhibitory Activity

Background: Traditionally, The Algerian medicinal plant Elaeosilenum thapsioides have been used for many diseases. Objective: The present research work is aimed to explore the chemical and biological characterization of essential oil of, Elaeoselinum thapsioides (Desf.) Maire. Methods : The essential oils were obtained by hydrodistillation of different Elaeosilenum thapsioides (Apiaceae) aerial parts samples collected from two different regions (Mahouane and Megres) Setif, Eastern Algeria. The chemical characterization of the obtained essential oils was investigated in the present work for the first time by GC and GC-MS. Besides, they were evaluated for their in-vitro acetylcholinesterase (AChE) inhibitory activity whose enzyme hyperactivity is involved in Alzheimer’s disease. Using Ellman’s spectrophotometric method, additionally, their in-vitro antimicrobial activity was assessed by the disc diffusion method. Both activities were performed at various oil concentrations. Results: The GC/MS analysis of the aerial parts (leaves, stems, flowers, and seeds) essential oils of E. thapsioides revealed the presence of dominant compounds and others in small quantities, identifying 47 chemical molecules. Monoterpene hydrocarbons were the main components, ranging from 72.78 % to 99.13 %. Oxygenated monoterpenes and oxygenated sesquiterpenes ranged between (1.37 % -17.25 %) and (0.12 % -3.53 %) in leaves and stem essential oils. Sesquiterpene hydrocarbons were present in small to large quantities in the essential oils of both populations, with contents ranging from 0.69 % to 13.44 %. For the Isothiocyanates, their presence was recorded in leaves and stem essential oils from Mahouane and Merges with 9.73 % and 3.72 %, consecutively. Indeed, the essential oil of the Mahouane stem showed the highest AChE inhibitory activity among all the tested essential oils. Whereas the highest antibacterial activity was shown by the essential oil obtained from Megres leaves against Bacillus cereus ATCC 11778. Conclusion: The oils exhibited a moderate inhibitory activity in both activities.

scholarly journals Ethnopharmacology, Phytochemistry, and Pharmacological Properties of Thymus satureioides Coss.

2021 ◽  
Vol 2021 ◽  
pp. 1-23
Author(s):  
Naoufal El Hachlafi ◽  
Abderrahim Chebat ◽  
Kawtar Fikri-Benbrahim
Keyword(s):  
Essential Oils ◽  
Bioactive Compounds ◽  
Biological Activities ◽  
Chemical Characterization ◽  
Pharmacokinetic Studies ◽  
Pharmacological Studies ◽  
Thymus Satureioides

Thymus satureioides Coss. (Lamiaceae) is a Moroccan medicinal plant locally known as “Azkouni” or “Zaitra.” It is widely used in traditional medicine to treat various ailments, including hypertension, diabetes, cold, fever, dermatological and circulatory disorders, immune problems, bronchitis, nociception, cooling, pharyngitis, cough, and influenza. The current review aims to critically summarize the literature on ethnopharmacological uses, chemical profile, and pharmacological investigations of T. satureioides in order to provide data support and scientific evidences for further investigations. Electronic databases such as Scopus, PubMed, Web of Science, SciFinder, ScienceDirect, Google Scholar, and Medline were used to gather data on T. satureioides. Chemical characterization of T. satureioides essential oils (EOs) and extracts allowed to identify a total of 139 bioactive compounds, mainly belonging to the terpenoids, phenolic acids, and flavonoids classes. T. satureioides especially its essential oils exhibited numerous biological activities such as antibacterial, antifungal, anti-inflammatory, antioxidant, antidiabetic, anticancer, antiparasitic, and hypolipedemic activities. In light of these findings, further studies to transmute the traditional application of T. satureioides into scientific-based information are strongly required. Additional in vivo pharmacological studies are recommended to validate the results of the in vitro studies. Moreover, comprehensive preclinical and clinical trials on the pharmacological mechanisms of action of this plant and its bioactive compounds on molecular targets should be performed. Finally, more efforts must be focused on toxicological assessments and pharmacokinetic studies, in order to ensure the safety and the efficiency of T. satureioides.

scholarly journals Effets de quatre huiles essentielles sur la croissance mycélienne radiale d’un isolat de Alternaria sp. au Burkina Faso

2020 ◽  
Vol 14 (3) ◽  
Author(s):  
A. Sirima ◽  
A. Sereme ◽  
D. Sereme ◽  
K. Koïta ◽  
T.A. Nana ◽  
...  
Keyword(s):  
Essential Oils ◽  
Burkina Faso ◽  
Early Blight ◽  
Ocimum Basilicum ◽  
Huiles Essentielles ◽  
Activité Antifongique ◽  
Lippia Multiflora ◽  
Alternaria Sp ◽  
Cymbopogon Schoenanthus

L’alternariose de la tomate est une maladie cryptogamique dévastatrice dans les zones maraichères du Burkina Faso. Tous les organes de la plante (tiges, feuilles, fruits) sont attaqués, entrainant une baisse importante du rendement et une dépréciation de la qualité de la production. Dans la présente étude, quatre huiles essentielles de plantes aromatiques locales (Cymbopogon schoenanthus, Lippia multiflora, Ocimum americanum, et Ocimum basilicum) ont été testées, pour évaluer leurs propriétés d'inhibition sur la croissance radiale du mycélium d’un isolat pathogène de Alternaria sp. Le test in vitro des doses de 100%, 50%, 10%, 5% et 1% a montré que toutes ces huiles essentielles possèdent une activité antifongique sur ledit isolat. Les taux d’inhibition des huiles essentielles sur la croissance du champignon étudié vont de 25,96% à 100%. La meilleure inhibition a été enregistrée avec l’huile essentielle de Cymbopogon schoenanthus, de Ocimum basilicum et de Lippia multiflora pour les concentrations supérieures à 1%. Il ressort donc de cette étude que trois huiles essentielles, stoppent la croissance mycélienne de l’isolat pour des doses allant de 5% à 100%. Ces huiles (Cymbopogon schoenanthus, Ocimum basilicum et Lippia multiflora) pourraient être utilisées pour la mise au point de phytopesticides afin d'atténuer l’utilisation intensive et hasardeuse des pesticides.Mots clés:  Alternariose, activité antifongique, plante aromatique, tomate. English Title: Effects of four essential oils on radial mycelial growth of an isolate of Alternaria sp. in Burkina Faso Early blight of tomato is a devastating cryptogamic disease in the vegetable gardens in Burkina Faso. All plant’s organs (stems, leaves, fruits) are attacked causing a significant decrease in the yield and a depreciation of the quality of the production in the field. In the present study, four essential oils of aromatic plants (Cymbopogon schoenanthus, Lippia multiflora, Ocimum americanum, and Ocimum basilicum) were tested to evaluate the inhibition properties of these oils on the radial growth of the mycelium of an isolated pathogen of Alternaria sp. In vitro tests at doses of 100%, 50%, 10%, 5% and 1% showed that all these essential oils tested have antifungal activity on said strain. The inhibition rates of essential oils on the growth of the fungus studied range from 25.96% to 100%. The best inhibition was recorded with the essential oil of Cymbopogon schoenanthus, Ocimum basilicum and Lippia multiflora for applied concentrations more than 1%. It therefore emerges from this study that three essential oils stop the mycelial growth of the isolate for doses ranging from 5% to 100%. These oils (Cymbopogon schoenanthus, Ocimum basilicum and Lippia multiflora) could be used for the development of phytopesticides in order to reduce the intensive and hazardous use of pesticides.Keywords: Early blight, antifungal activity, aromatic plant, tomato.  

scholarly journals Biological activities of four essential oils against Anopheles gambiae in Burkina Faso and their in vitro inhibition of acetylcholinesterase

2015 ◽  
Vol 9 (2) ◽  
pp. 793 ◽  
Author(s):  
DW Wangrawa ◽  
A Badolo ◽  
WM Guelbéogo ◽  
M Kiendrébeogo ◽  
RCH Nébié ◽  
...  
Keyword(s):  
Essential Oils ◽  
Burkina Faso ◽  
Anopheles Gambiae ◽  
Biological Activities
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