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    Biological activities and chemical composition of essential oil of Achillea maritima (L.) Ehrend. & YPGuo
    (Taylor & Francis Inc, 2023) Elkiran, Omer; Avsar, Cumhur; Bagci, Eyup
    This study aimed to describe the chemical composition of the essential oil (EO) of stems, leaves and flowers of A. maritima collected from Turkey, and verify its antimicrobial and antioxidant properties. The EO was analyzed by GC-FID and GC-MS. Fifty-nine compounds representing to 98.1% of the EO were identified. The antimicrobial activities were determined against seven bacteria and two yeast species by using disc diffusion and MIC techniques. According to the results, it was observed that there was no effect of the EO against Gram-positive bacteria. The EO showed a low effect (8-9 mm) against Gram-negative bacteria, but the EO had a high effect (20-22 mm) against the tested fungi. In addition, according to the MIC test results, the EO presented effects against C. krusei, C. parapsilosis at a concentration of 50 mu l/ml. The antioxidant activity of the EO was determined as IC50 = 31.9 mu l/mL.
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    Öğe
    CONSTITUENTS OF ESSENTIAL OILS FROM LEAVES AND SEEDS OF LAURUS NOBILIS L.: A CHEMOTAXONOMIC APPROACH
    (Bangladesh Botanical Soc, 2018) Elkiran, Omer; Akbaba, Emel; Bagci, Eyup
    In the present study, chemical compositions of essential oils from seeds and leaves of laurel (Laurus nobilis L.) were evaluated using GC-GC/MS system. Sixty nine different compounds were identified constituting 86.7% of the total oil from the seed, while 76 compounds were determined, constituting 95.8% of the total oil extracted from the leaves. The major compounds of essential oil from laurel seeds included eucalyptol (17.2%), alpha-terpinyl acetate (9.0%), caryophyllene oxide (6.1%), spathulenol (5.0%) and methyl eugenol (4.2%), constituting 41.5% of the total oil. However, eucalyptol (18.0%), alpha-terpinyl acetate (13.1%), sabinene (7.8%), alpha-pinene (4.5%), 2 (4-methoxyphenyl)-N,N,2-trimethyl-1-pyrroline (4.4%) were identified as the major compounds in the oil from laurel leaves, constituting 47.8% of the total oil. Eucalyptol and aterpinyl acetate, belonging to monoterpenoids, were determined in the highest concentrations within both oils. However, the other principle compounds differ between the two volatile oils.
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    Öğe
    POLLEN MORPHOLOGY AND ITS RELATIONSHIP TO THE TAXONOMY OF THE SOME TAXA OF HELICHRYSUM GAERTNER (ASTERACEAE) IN TURKEY
    (Pakistan Botanical Soc, 2017) Elkiran, Omer; Bagci, Eyup; Evren, A. Harun
    Palynological studies of Helichrysum chionophilum, Helichrysum noeanum, Helichrysum arenarium subsp. aucheri, Helichrysum graveolens, H. plicatum subsp. plicatum and H. plicatum subsp. polyphyllum (Asteraceae) from Turkey have been carried out. H. chionophilum, H. noeanum and H. arenarium subsp. aucheri are endemics to Turkey. Pollen features of both taxa were observed with the Light and Scanning Electron Microscopy (SEM). The pollen type of both taxa were determined as tricolporate, pollen shapes were spheroidal and oblate-spheroidal, reticular pollen ornamentation was observed. The studies show that the pollen of the six taxa are very similar regarding pollen shapes, apertures, and ornamentation, but may be distinguished by colpus length (Clg), pore width (Plt) and pore length (Plg). The findings obtained from the study are discussed with each other and the genus patterns.
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    Öğe
    The chemical composition and biological activities of essential oil from the aerial parts of Eryngium maritimum L. (Apiaceae)
    (Taylor & Francis Ltd, 2023) Elkiran, Omer; Avsar, Cumhur; Veyisoglu, Aysel; Bagci, Eyup
    This study aimed to describe the chemical composition of the Essential Oil (EO) of the aerial parts of E. maritimum, and verify its antimicrobial and antioxidant properties. The EO chemical characterization was simultaneously obtained by GC/FID and GC/MS. Thirty-one compounds corresponding to 93.3% of the EO were identified in the EO of E. maritimum. Spathulenol (22.0%), aromadendrene (18.3%), humulene epoxide (6.6%), and beta-humulene (4.8%) were the main compounds of the EO. The antimicrobial activities were determined against 3 gram-positive bacteria, 4 gram-negative bacteria, and 2 yeast species by using disc-diffusion and MIC techniques. EO showed a low effect (8-11 mm) against all tested bacteria and yeasts. Additionally, EO extract against Staphylococcus aureus ATCC 6538 and Shigella flexneri ATCC 12022 from tested microorganisms presented a MIC value at mu l/ml concentration. The antioxidant activity of the EO was determined as IC50=16.8 +/- 1.65 mu l/mL. To the best of our knowledge, this is the first report on the chemical composition and biological activities of E. maritimum EO in Turkey.