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Effects of Cymbopogon citratus L. essential oil on the growth, lipid content and morphogenesis of Aspergillus niger ML2-strain
Faculty
Science
Year:
2006
Type of Publication:
Article
Pages:
456-469
Authors:
Sarhan, M. M, Abu Shahla, A. N. K, Abou El-Khair, E. K, Helal, G. A
DOI:
10.1002/jobm.200510106
Journal:
JOURNAL OF BASIC MICROBIOLOGY WILEY-V C H VERLAG GMBH
Volume:
46
Research Area:
Microbiology
ISSN
ISI:000242849400004
Keywords :
Effects , Cymbopogon citratus , essential , , , growth, lipid
Abstract:
The mycelial growth of Aspergillus niger VAN TIEGHEM was completely inhibited using 1.5 mu l/ml or 2.0 mu l/ml of Cymbopogon citratus essential oil applied by fumigation or contact method in Czapek liquid medium, respectively. This oil was found also to be fungicidal at the same concentrations. The sublethal doses 1.0 and 1.5 mu l/ml inhibited about 70\% of fungal growth after five days of incubation and delayed conidiation as compared with the control. Microscopic observations using Light Microscope (LM), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) were carried out to determine the ultra structural modifications of A. niger hyphae after treatment with C. citratus essential oil. The hyphal diameter and hyphal wall appeared markedly thinner. This oil also caused plasma membrane disruption and mitochondrial structure disorganization. Moreover, Ca+2, K+ and Mg+2 leakages increased from the fumigated mycelium and its total lipid content decreased, while the saturated fatty acids decreased and unsaturated fatty acids increased. These findings increase the possibility of exploiting C. citratus essential oil as an effective inhibitor of biodegrading and storage contaminating fungi and in fruit juice preservation.
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جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف