Tıbbi Bitkilerden Elde Edilen Uçucu Yağların Kimyasal Bileşimi ve Gal Oluşturan Bitki Patojeni Bakteriyel Hastalık Etmenlerine Karşı Antibakteriyel Etkinlikleri

Abstract

The aims of this study were to determine chemical composition of essential oils from different plant species and their antibacterial activities against gal-forming plant pathogenic bacterial disease agents Rhizobium radiobacter, Pseudomonas savastanoi pv. savastanoi and P.savastanoi pv. nerii. The chemical compositions of essential oils were identified by GC/MS. The major constituents of the essential oils were carvacrol in Thymbra spicata var. spicata (66.88%) and Origanum syriacum (79.8%), thymol in Thymus serpyllum (41.03%), geranial in Thymus sipyleus (13.72%) and Melissa officinalis (30.4), 4-terpineol in Origanum majorana (31.67%), linalool in Ocimum basilicum (30.23%), carvone in Mentha spicata (55.58%), 1,8 cineole in Lavandula stoechas var. stoechas (35.5%), Laurus nobilis (35.5%) and Rosmarinus officinalis (18.47%), camphor in Salvia officinalis (24.59%) and trans-anethole in Foeniculum vulgare (82.8%) essential oils, respectively. Based on inhibition zone diameter values, essential oils showed very strong antibacterial activities against P.savastanoi pv. savastanoi (7.0-44.67 mm), followed by R.radiobacter (9.6-37.67 mm) and P.savastanoi pv. nerii (6.33-18.33 mm). Essential oils of plants belong to Lamiaceae family were generally found to be more efficient than those belong to Lauraceae and Apiaceae families. The essential oils of O.syriacum, T.serpyllum and T.spicata var. spicata were found to be the most promising essential oils displaying the highest antibacterial activities against all tested bacterial species. The findings of the present study revealed that essential oils have a potential to be used as antibacterial agents against gall forming bacterial disease agents.