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Chemical composition and biological activities of four citrus essential oils [electronic resource].

By:

Saad, Mona M. G

Contributor(s):

Abou-EL-Magd, B. M

Language: English Summary language: Arabic Description: p.767-780Other title:

المكونات الكيميائية والنشاط البيولوجي لأربعة من زيوت الموالح الطيارة [Added title page title]

Uniform titles:

Mansoura University Journal of plant protection and pathology, 2013 v. 4 (9) [electronic resource].

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Full Text Article.

In: Mansoura University Journal of Plant Protection and Pathology 2013.v.4(9)Summary: Essential oils of four Citrus species, Citrus aurantifolia, C. limon, C. paradisi and C. sinensis, were extracted from fruit peels by hydrodistillation. The chemical composition of the isolated oils was analyzed by gas chromatography/mass spectrometry (GC-MS). Effect of the isolated essential oils on seed germination and seedling growth of Silybum marianum was evaluated. The essential oils were also tested for their molluscicidal and insecticidal activities against the adults of Theba pisana snails and the fourth instar larvae of Spodoptera littoralis. Chemical analysis showed that dl-Limonene was the major component in the four essential oils and represented 40. 19, 56.30, 74.29 and 89.23% of C. aurantifolia, C. limon, C. paradisi and C. sinensis, respectively. In general, the four oils were characterized to be rich in monoterpene hydrocarbons and oxygenated monoterpenes. Allelopathic experiment on S. marianum revealed that the tested oils reduced the germination percentages at all of the tested concentrations. The oil of C. aurantifolia caused the highest germination reduction at concentration of 10 UL/ Petri dish where 26.7 % of seeds were germinated. The oil of C. sinensis was the most potent inhibitor for root and shoot growth of S. marianum with EC₅₀ values of 2.5 and 6.97 UL/Petri dish, respectively.

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Essential oils of four Citrus species, Citrus aurantifolia, C. limon, C. paradisi and C. sinensis, were extracted from fruit peels by hydrodistillation. The chemical composition of the isolated oils was analyzed by gas chromatography/mass spectrometry (GC-MS). Effect of the isolated essential oils on seed germination and seedling growth of Silybum marianum was evaluated. The essential oils were also tested for their molluscicidal and insecticidal activities against the adults of Theba pisana snails and the fourth instar larvae of Spodoptera littoralis. Chemical analysis showed that dl-Limonene was the major component in the four essential oils and represented 40. 19, 56.30, 74.29 and 89.23% of C. aurantifolia, C. limon, C. paradisi and C. sinensis, respectively. In general, the four oils were characterized to be rich in monoterpene hydrocarbons and oxygenated monoterpenes. Allelopathic experiment on S. marianum revealed that the tested oils reduced the germination percentages at all of the tested concentrations. The oil of C. aurantifolia caused the highest germination reduction at concentration of 10 UL/ Petri dish where 26.7 % of seeds were germinated. The oil of C. sinensis was the most potent inhibitor for root and shoot growth of S. marianum with EC₅₀ values of 2.5 and 6.97 UL/Petri dish, respectively.

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