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Articles by Abdellah Ait Ben Aoumar
Total Records ( 2 ) for Abdellah Ait Ben Aoumar
  Hassan Boubaker , Hicham Karim , Fouad Msanda , El Hassan Boudyach and Abdellah Ait Ben Aoumar
  Back Ground and Objective: Medicinal plants are getting popular day by day because of their easy accessibility and reasonable costs. This study investigated the chemical composition and antifungal activity of Lavandula mairei, Lavandula dentata and Tetraclinis articulata plants essential oils against Penicillium digitatum, Penicillium italicum and Geotrichum citri-aurantii, the main post-harvest pathogens in citrus. Materials and Methods: Essential oils were obtained by hydrodistillation from areal parts of tested plants. Afterwards, they were analyzed by means of GC-MS and their antifungal efficacy was tested in vitro by using the agar plate’s method. Results: The main constituents were carvacrol for L. mairei, camphor, linalool and β-pinene for L. dentata and bornyl acetate, α-pinene, borneol and limonene for T. articulata. In the in vitro assay, the effect of essential oils on mycelial growth and spore germination varied significantly between tested plant species. Complete growth inhibition of the three pathogens was obtained by L. mairei essential oil. Also, L. mairei displayed the highest bioactivity, inhibiting completely the spore germination of the three pathogens. Moreover, this species showed fungistatic and fungicidal activity on the three fungal pathogens. Conclusion: In this study, L. mairei essential oil showed great antifungal activity which could represent a potential alternative to synthetic fungicides for the control of citrus fruit fungal pathogens.
  Fayza Tahiri Alaoui , Latifa Askarne , Hassan Boubaker , El Hassane Boudyach and Abdellah Ait Ben Aoumar
  Background and Objective: Tomato is the major fruit crop produced and exported in Morocco. This commodity is faced to many threats. The most important tomato diseases caused commercially significant losses, in Morocco and worldwide, is gray mold caused by Botrytis cinerea. This study was aimed to find out an alternative to synthetic fungicides used in the control of the polyphagous devastating fungus ‘Botrytis cinerea’ using common food additives. Materials and Methods: Thirty seven organic acids and salts considered as common food additives were tested in vitro against this pathogen using the agar dilution method. Compounds with the best antifungal activity, selected after one-way analysis of variance, were tested in vivo on artificially inoculated tomato fruit. Results: At 0.02 M, EDTA, copper sulfate and sodium metabisulfite completely inhibited the mycelial growth and sporulation of B. cinerea. The lowest Minimum Inhibitory Concentration (MIC) and Minimum Fungicidal Concentration (MFC) were recorded in sodium metabisulfite treatment. The conidia germination was inhibited by ammonium molybdate and sodium metabisulfite treatments at only 10 mM. The nine most active chemicals in the in vitro trials were tested in vivo on tomato fruit. The incidence and the severity of gray mold were significantly reduced by EDTA, potassium carbonate, sodium bicarbonate, sodium carbonate, sodium metabisulfite and sodium salicylate compared to 100% (incidence and the severity) in the control. Conclusion: The results of the current study suggest that these salts are potentially useful as postharvest GRAS compounds to control B. cinerea on tomato fruit.
 
 
 
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