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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Antioxidant activities of the essential oils and methanol extracts from myrtle (Myrtus communis var. italica L.) leaf, stem and flower
Food and Chemical Toxicology, Volume 48, No. 5, Year 2010
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Description
This study was designed to examine the chemical composition and antioxidant activity of the essential oils and methanol extracts of Myrtus communis var. italica L. leaf, stem and flower. Myrtle leaf and flower were the valuable organs for the essential oil production representing a yield of 0.61% and 0.30% (w/w), respectively. The essential oil composition of myrtle leaf and flower was characterized by high proportions of α-pinene, the main compound of monoterpene hydrocarbon class, with 58.05% for leaf and 17.53% for flower. Stem was rich in oxygenated monoterpenes, largely due to 1,8-cineole with 32.84%. The total phenol contents varied between different myrtle parts; leaf extract had higher total phenol content (33.67. mg GAE/g) than flower (15.70. mg GAE/g) and stem (11.11. mg GAE/g) extracts. Significant differences were also found in total tannin contents among different myrtle parts, representing 26.55. mg GAE/g in leaf, 11.95. mg GAE/g in flower, 3.33. mg GAE/g in stem. The highest contents of total flavonoids and condensed tannins were observed in stem (5.17 and 1.99. mg CE/g, respectively) and leaf (3 and 1.22. mg CE/g, respectively) extracts. The HPLC analysis indicated that the main phenolic class was hydrolysable tannins (gallotannins) in leaf (79.39%, 8.90. mg/g) and flower (60.00%, 3.50. mg/g) while the stem was characterized by the predominance of flavonoid class (61.38%, 1.86. mg/g) due to the high presence of catechin (36.91%, 1.12. mg/g). Antioxidant activities of the essential oil and the methanolic extract from different myrtle parts were evaluated by using DPPH radical scavenging, β-carotene-linoleic acid bleaching, reducing power and metal chelating activity assays. In all tests, methanolic extracts of different myrtle parts showed better antioxidant activity than essential oils. © 2010 Elsevier Ltd.
Authors & Co-Authors
Aidi-Wannes, Wissem
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
M’Hamdi, Baya
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Sriti, Jazia
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Ben Jemia, Mariem
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Ouchikh, Olfa
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Hamdaoui, Ghaith
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Kchouk, Mohamed Elyes
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Marzouk, Brahim
Tunisia, Hamam Lif
Centre de Biotechnologie de Borj Cédria
Statistics
Citations: 375
Authors: 8
Affiliations: 1
Identifiers
Doi:
10.1016/j.fct.2010.03.002
ISSN:
02786915