7
ABSTRACT
ANTIFUNGAL ACTIVITY OF SOME PLANT ESSENTIAL OILS AGAINST POSTHARVEST PATHOGENS OF CITRUS
In this study, Antifungal activities of the essential oils obtained from different plant species such as white oregano (Origanum onites L.), Syrian oregano (Origanum syriacum var. bevanii Holmes), tyme (Thymbra spicata L.), lavender (Lavandula stoechas subsp. stoechas L.), fennel (Foeniculum vulgare Mill.) and laurel (Laurus nobilis L.) growing in the Eastern Mediterranean Region of Turkey, were investigated against major post-harvest fungal pathogens of Citrus, Alternaria alternata (Brown spot), Penicillium digitatum (green mold), Botrytis cinerea (grey mold) and Aspergilus niger (Aspergillus rot).
Antifungal activities of contact and volatile phases of essential oils on mycelial growth, conidial germination and germ tube elongation were determined by using different concentrations. The results indicate that essential oils of O.onites, O. syriacum and T.spicata were strongly inhibitory to all fungi tested compare with other essential oils of F. vulgare, L. nobilis and L. stoechas. Volatile phase effects of essential oil was consistently found to be more successful on inhibition of mycelial growth, spore germination and germ tube elongations at lower concentrations in comparison to contact phase effect of the oils tested.
Light and scanning electron microscopes were used to observe possible morphological alterations caused by essential oils on fungal hyphae and conidia. Microscopic observation of fungal hyphae, exposed to volatile phase of essential oils revealed considerable structural deformations such as cytoplasmic coagulation, vacuolations, hyphal lysis and protoplast leakage.
2007, 45 pages
Key words: Antifungal activity, Essential oil, Penicillium, Aspergillus, Botrytis, Alternaria



7. SAYFAYA BENZER SAYFALAR

Domateste Phytophthora infestans ve Sclerotinia sclerotioruma karşı uçucu yağlar ve bitki ekstraklarının antifungal etkileri - Sayfa 6
II ABSTRACT ANTIFUNGAL EFFECTS of ESSENTIAL OILS and PLANT EXTRACTS AGAINST Phytophthora infestans and Sclerotinia sclerotiorum ON TOMATO hı this study, in vitro antifungal activities of essential oils and water extracts obtained from Syrian oregano (Origanum syriacum), thyme (Thymbra spicata) and lavender (Lavandula stoechas), naturally growing plants in the different regions of Hatay province...
Hıyar kök ve kökboğazı çürüklüğü etmeni Fusarium oxysporum F. sp. radicis-cucumerinum' a karşı bitki uçucu yağlarının antifungal etkileri - Sayfa 7
II ABSTRACT ANTIFUNGAL ACTIVITIES OF PLANT ESSENTIAL OILS AGAINST CUCUMBER ROOT ROT PATHOGEN Fusarium oxysporum f.sp. radicis cucumerinum In this study, antifungal activities of the essential oils obtained from different plant species such as white oregano (Origanum onites L.), lavender (Lavandula stoechas subsp. stoechas L.), fennel (Foeniculum vulgare Mill.), laurel (Laurus nobilis ) and myr...
Bitki uçucu yağ ve bileşenlerinin fasulyede sorun olan fungal ve bakteriyel hastalık etmenlerine karşı antimikrobiyal etkinliklerinin in vitro koşullarda araştırılması - Sayfa 7
II ABSTRACT INVESTIGATION OF IN VITRO ANTIMICROBIAL EFFICACY OF PLANT ESSENTIAL OILS AND THEIR MAIN CONSTITUENTS AGAINST FUNGAL AND BACTERIAL DISEASE AGENTS OF BEAN In this study, in vitro antimicrobial efficacy of essential oils (EO’s) obtained from Syrian oregano (Origanum syriacum), fennel (Foeniculum vulgare) and laurel (Laurus nobilis) plants, naturally growing in the different regions of...

7. SAYFADAKI ANAHTAR KELIMELER

origanum
foeniculum
vulgare
essential
antifungal
oils


7. SAYFA ICERIGI

7
ABSTRACT
ANTIFUNGAL ACTIVITY OF SOME PLANT ESSENTIAL OILS AGAINST POSTHARVEST PATHOGENS OF CITRUS
In this study, Antifungal activities of the essential oils obtained from different plant species such as white oregano (Origanum onites L.), Syrian oregano (Origanum syriacum var. bevanii Holmes), tyme (Thymbra spicata L.), lavender (Lavandula stoechas subsp. stoechas L.), fennel (Foeniculum vulgare Mill.) and laurel (Laurus nobilis L.) growing in the Eastern Mediterranean Region of Turkey, were investigated against major post-harvest fungal pathogens of Citrus, Alternaria alternata (Brown spot), Penicillium digitatum (green mold), Botrytis cinerea (grey mold) and Aspergilus niger (Aspergillus rot).
Antifungal activities of contact and volatile phases of essential oils on mycelial growth, conidial germination and germ tube elongation were determined by using different concentrations. The results indicate that essential oils of O.onites, O. syriacum and T.spicata were strongly inhibitory to all fungi tested compare with other essential oils of F. vulgare, L. nobilis and L. stoechas. Volatile phase effects of essential oil was consistently found to be more successful on inhibition of mycelial growth, spore germination and germ tube elongations at lower concentrations in comparison to contact phase effect of the oils tested.
Light and scanning electron microscopes were used to observe possible morphological alterations caused by essential oils on fungal hyphae and conidia. Microscopic observation of fungal hyphae, exposed to volatile phase of essential oils revealed considerable structural deformations such as cytoplasmic coagulation, vacuolations, hyphal lysis and protoplast leakage.
2007, 45 pages
Key words: Antifungal activity, Essential oil, Penicillium, Aspergillus, Botrytis, Alternaria

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