Chemical composition and antimicrobial activity of essential oils from TunisianPituranthos tortuosus (Coss.) Maire

Abstract

The aerial parts of Pituranthos tortuosus, collected during November and April, were analysed by GC and GC-MS. In total, 56 compounds were identified by their retention indices. Antimicrobial assays showed that the November essential oil is more effective than that of April against the Gram-positive bacteria Enterococcus faecalis and Staphylococcus aureus. The April essential oil displayed the highest activity against Staphylococcus aureus.

Effect of the Method of Preparation on the Composition and Cytotoxic Activity of the Essential Oil of Pituranthos tortuosus

“…Previous reports on the chemical composition of P. tortuosus included the investigation of its phenolic, hydrodistilled essential oil and sesquiterpene lactone contents (Mahran et al, 1989;Abdel-Mogib et al, 1992;Abdel-Ghani and Hafez, 1995;Singab et al, 1998;Abdel-Kader, 2003). Also the effect of the time of collection on the chemical composition and antimicrobial activity of its essential oil was reported (Abdelwahed et al, 2006).…”

Green Synthesis of Zinc Oxide Nanoparticles Using Aqueous Extract of Deverra tortuosa and their Cytotoxic Activities

“…As a member of Apiaceae family, D. tortuosa possesses a characteristic pungent or aromatic scent. The presence of important bioactive compounds in different parts of the plant; flavonoids, terpenoids, glycosides, essential oil, furanocoumarins and unsaturated sterols has been previously published [11][12][13] . The plant is often used by local citizens in traditional medicine as analgesic, carminative, diuretic, antiasthmatic and to relieve stomach pain and against intestinal parasites 14,15 .…”

Chemical Composition and Antimicrobial Activity of <i>Pituranthos chloranthus</i> (Benth.) Hook and <i>Pituranthos tortu-osus</i> (Coss.) Maire Essential Oils from Southern Tunisia

“…This difference on composition between oils suggests that different chemotypes of P. chloranthus exist in Tunisia. P. tortuosus oil types extracted from the fresh herb collected in Monastir (central Tunisia) depends on the period of the collect of vegetal samples [6]: EO of samples collected during November was mainly composed of myrtenol (26.2%), sabinene (11.0%), limonene (10.9%), α-pinene (5.5%) and 3-n-butyl phthalide (5.9%) whereas the oil of samples harvested during April was mainly composed of terpinen-4-ol (39.6%), 3-n-butyl phthalide (11.4%), butylidene phthalide (4.1%), limonene (4.1%) and sabinene (3.2%). The yield and the composition of EOs isolated from aerial parts of P. tortuosus growing wild in Egypt vary with the method of extraction [8]: the major components of the oil prepared by hydrodistillation were β-myrcene (18.8%), sabinene (18.5%), trans-iso-elemicin (12.9%), and terpinen-4-ol (8.1%); those predominant in the oil extracted by the simultaneous hydrodistillation-solvent (n-pentane) extraction were terpinen-4-ol (29.7%), sabinene (7.4%), γ-terpinene (7.3%) and β-myrcene (5.5%); while the prominent ones in the oil isolated by the conventional volatile solvent extraction sample were terpinen-4-ol (15.4%), dillapiol (7.9%), and allo-ocimene (4E, 6Z) (6.0%).…”

“…Identification of the components was based: 1) on comparison of their GC RIs on apolar column (HP-5) with those of literature data [6]- [9]. 2) by comparison of their recorded mass spectra with those of a computer library (Wiley 275 library and NIST98 database/Chem Station data system) provided by the instrument software and MS literature data [9] [10]; 3) identities of some other components were further confirmed by co-injection of pure standards available in the laboratory under the same GC/MS conditions as above.…”

“…The composition and biological activities of P. tortuosus EO have been previously reported [4]- [8]. Abdewahed et al [6] show that the chemical composition and the bacterial activity of EO isolated from fresh aerial parts collected in Monastir (center of Tunisia) depend on the period of collect: the November EO mainly composed of myrtenol is more effective than that of April mainly composed of terpinen-4-ol against the Gram-positive bacteria Enterococcus faecalis and Staphylococcus aureus. These oils also showmutagenic, antimutagenic, cytotoxic and apoptotic activities [7].…”