Search

Ruta Chalepensis L. leaf essential oils were hydrodistillated and analyzed by GC-MS for their chemical compositions. Ten compounds were identified from the plant leaves, with 2-undecanone (40.69%), butanoic acid3-oxo- ethyl ester (23.5%) and 2-acetylcycloheptanone (17.1%) as the three major chemical compositions. Moreover, butanoic acid 3-oxo- ethyl ester (23.50%), 2-acetylcycloheptanone (17.10%), acetic acid-sec-octyl ester (2.17%), and phenol 4 - (1, 1, 3, 3-tetramethylbutyl) (3.10%) were reported for the first time in the essential oil of R. chalepensis L. leaves collected from Mekelle, Ethiopia. [ABSTRACT FROM AUTHOR]

The chemical compositions of essential oils ofRuta chalepensisL. (Rutaceae) collected from the South-East of Tunisia (Thoujene at 525 m altitude) were identified. The essential oils were extracted from the leaves, stems, and fruits by hydrodistillation and they were analyzed by gas chromatography (GC-FID) and gas chromatography/mass spectrometry (GC-MS). Nineteen compounds were identified from the different plant organs, where ketones and esters constituted the main chemical classes. The most abundant compounds in the leaves and stems’ essential oils were 2-nonanone (16.7–22.1 %), octyl acetate (12.1–26.8 %) and 2-undecanone (27.9–37.7 %), while 2-nonanone (19.1 %) and 2-undecanone (58.4 %) were found to be major compounds in the fruits’ essential oil. Our findings suggest thatR. chalepensisgrowing wild in South-East of Tunisia seems to be a new chemotype. [ABSTRACT FROM AUTHOR]

To our knowledge, this study is the first to investigate the biological activities of the methanolic extracts of leaves, roots and stems of Ruta chalepensis L. (Rutaceae) in Tunisia. The chemical composition of the essential oil extracted from R. chalepensis leaves was determined by GC-MS. The antioxidant activities of tested essential oil and the methanolic extracts of leaves, stems and roots of R. chalepensis were evaluated using DPPH and ABTS radicals scavenging tests. Their antimicrobial activities were achieved by disc diffusion method and broth dilution assay. The main components of the selected essential oil were menthol (43.92%) and linalool (42.10%). Significant differences were found between the total phenol contents and biological activities of the different parts of R. chalepensis. In addition, significant correlations were observed between antioxidant activities and phenolic contents for methanol extracts. In fact, leaves extract presented higher total phenol content than stems and roots extracts. The tested oil showed better antioxidant activity than methanolic extracts. The highest antioxidant activity was recorded in leaves methanolic extract. The latter showed strong antibacterial activity against tested microorganisms, whereas the evaluated oil remained almost inactive. The inhibition zones diameters and minimal inhibitrice concentration values for tested bacteria, which were sensible to different methanolic extracts, were in the range of 8-35 mm and 0.78-25 mg/ml, respectively. This study demonstrated that the R. chalepensis extract can be regarded as promising candidate for natural plant source of antioxidant and antimicrobial agents. [ABSTRACT FROM AUTHOR]

The essential oil of Ruta chalepensis L, herb belonging to Rutaceae family, is useful in perfumery, for flavoring and has insecticidal activity. Its composition depends on the specific geobotanical conditions, and several chemiotypes has been described. The aim of this work was to establish the potential of the essential oil obtained from R. chalepensis as a candidate for the development of new antibacterials in the management of plant pathogens. The essential oil was obtained by hydrodistillation with a Clevenger equipment; the yield determined and its chemical composition investigated by GC/MS. The antibacterial assessment was conducted using the agar diffusion technique. In the composition of the essential oil of rue (yield of 0.3 % (v/w)), aliphatic ketones were predominant; 2-undecanone (34.88%) and 2-nonanone (25.23%) showed the higher relative abundance. R. chalepensis essence inhibited growth of Xanthomonas albilineans (Ashby) Dowson and Clavibacter michiganensis subsp. michiganensis (Smith) Davis et al. The antibacterial effect suggests that this essence can provide the basis for future development of new antimicrobials for pest management in sugar cane and tomato. [ABSTRACT FROM AUTHOR]

Highlights: [•] We isolated essential oil of rutaceae and determined its constituents using gas chromatography–mass spectrometry technique. [•] We examined antimicrobial activity of essential oil against representatives of Gram-positive, Gram-negative bacteria and fungi. [•] Essential oil showed prominent antifungal activity. [ABSTRACT FROM AUTHOR]