Ahmet Duran - Academia.edu (original) (raw)

Papers by Ahmet Duran

Psephellus vanensis (Asteraceae), a new species from east Turkey 11

Journal of Ethnopharmacology, 2005

Using ethnobotanical techniques, the medicinal flora used by the inhabitants of San Rafael Coxcat... more Using ethnobotanical techniques, the medicinal flora used by the inhabitants of San Rafael Coxcatlán, Puebla was determined. During the field work, two types of interviews were applied (free listing and semi-structured) to 60 informants, who supplied consistent information concerning the use of 46 species of medicinal plants. Further analysis showed 13 categories of different medicinal use. An informant consensus factor was calculated and 16 species were selected due to their utilization in the treatment of diseases of possible bacterial origin. Of these 16 plants, sequential extractions were made with hexane, ethyl acetate and methanol. The obtained extracts were used to assess their antibacterial activity against 14 bacterial strains; 75% of the plants presented antibacterial activity. The medicinal species Jatropha neopauciflora Pax (Euphorbiaceae) and Juliania adstringens (Schldl.) Schldl. (Julianiaceae) were those that showed the biggest activity. Moreover, these species also had the highest informant consensus factor values.

Records of Natural Products, 2018

Mosquitoes are vectors for many pathogens and parasites that cause human diseases including dengu... more Mosquitoes are vectors for many pathogens and parasites that cause human diseases including dengue, yellow fever, West Nile, chikungunya, filariasis and malaria which cause high rates of human morbidity and mortality under extreme conditions. Plants are an excellent source for mosquito control agents because they constitute rich sources of bioactive chemicals. They are also biodegradable and environment-friendly. The present study reports on the larvicidal activity of the essential oil of Seseli gummiferum. subsp. ilgazense (Apiaceae) against Aedes aegypti larvae. Essential oil showed 100 and 70% mortality at 125 and 62.6 ppm, respectively, with no mortality at 31.25 ppm. Aerial parts of S. gummiferum subsp. ilgazense were subjected to hydrodistillation to yield 0.6% oil. The essential oil was analyzed by GC-FID and GC-MS techniques. The main constituents in the oil were sabinene (28.8%), germacrene D (9.5%) and α-pinene (7.2%).

African Journal of Biotechnology, Mar 22, 2010

In this study, the taxa which belong to the Jurinea Cass. genus, grown naturally in Turkey and co... more In this study, the taxa which belong to the Jurinea Cass. genus, grown naturally in Turkey and collected from different localities, are compared in terms of their internal transcribed spacer (ITS) regions of nuclear ribosomal DNA (nrDNA). The DNAs of the taxa were isolated by using a commercial kit (Nucleon Phytopure). Sequences were aligned with Clustal X. Phylogenetic relationships are assessed by sequence analysis, conducted with the DNASTAR software after the amplification of ITS regions with the universally recognized primers, named as 17SE and 26SE. In conclusion, morphologically similar taxa are also clustered together when a phylogenetic analysis is conducted based on molecular data. Jurinea species of the Anatolian peninsula are closely related with the topography of the region and certain level of molecular isolation of the species is evidenced.

South African Journal of Botany, 2007

The volatile constituents of Prangos pabularia Lindl. fruits (Umbelliferae) were obtained by hydr... more The volatile constituents of Prangos pabularia Lindl. fruits (Umbelliferae) were obtained by hydrodistillation (HD) and microdistillation (MD) techniques, and then analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC/MS) methods. One hundred and twenty-eight compounds have been characterized representing 90.5% of hydrodistilled oil (HDO). In the microdistilled oil (MDO), 115 compounds constituting 93.0% of the oil were detected. α-Humulene (16.6% and 15.5%), bicyclogermacrene (16.1% and 7.9%), spathulenol (10.6% and 5.7%), germacrene D (5.7% and 2.9%) and α-pinene (4.2% and 23.9%) were found to be the major constituents of HDO and MDO, respectively. Antimicrobial activity of the oil was tested via microdilution broth technique. Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Salmonella typhimurium, Staphylococcus epidermidis, Methicillin-resistant Staphylococcus aureus, and Candida albicans were used as the test microorganisms.

Annales Botanici Fennici, 2007

Jurinea remains a taxonomically complex genus, many of the problems concentrating around J. molli... more Jurinea remains a taxonomically complex genus, many of the problems concentrating around J. mollis. In this study, Jurinea species native in Turkey were collected from different localities in Anatolia and DNA was isolated from the collected samples, using a commercial plant DNA extraction kit (Nucleon phytopure). Inter Simple Sequence Repeat (ISSR) was the fingerprinting method preferred due to its high level of reliability and consistency as compared with the Randomly Amplified Polymorphic DNA (RAPD). The data were analyzed with NTSYS-pc 2.1. The phytogeographical distribution of Jurinea was found to be closely related to the Anatolian Diagonal. Based on the Diagonal, two major taxonomic groups emerged, from which J. kileae was clearly separated both morphologically and phylogenetically.

Candollea, 2011

A new species, Scorzonera coriacea A. Duran & Aksoy (Asteraceae) from Anatolia, Turkey, is descri... more A new species, Scorzonera coriacea A. Duran & Aksoy (Asteraceae) from Anatolia, Turkey, is described and illustrated. The species grows in open Pinus nigra forest and on the serpentine stony slopes of the Kızıldağ Mountain in the district of Derebucak (Konya province) and in the Kızıldağ National Park in the district of Şarkikaraağaç (Isparta province). Scorzonera coriacea is a very distinct species, and with no obvious allies among other Scorzonera species in Turkey in terms of morphological features. The new species is an endemic confined to the Southern Anatolia. Notes on its ecology, biogeography and its conservation status are also presented. The geographical distribution of the new species is mapped.

Turkish Journal of Botany, 1996

The genus Scorzonera L. encompasses about 160 species and being Ancient Mediterranean by origin, ... more The genus Scorzonera L. encompasses about 160 species and being Ancient Mediterranean by origin, it is widely spread in arid regions of Eurasia and Africa. The first thorough arrangement of the genus Scorzonera was given by DE CANDOLLE (1805). According to his system Scorzonera unites perennial herbs and shrubs with simple, entire, rarely pinnatifid leaves, phyllaries always deprived of horns, seeds mainly without or with hollow pedicels. Considerable changes in the treatment of the genus Scorzonera were introduced by BOISSIER (1875) who included Podospermum DC. and Epilasia (BUNGE) BENTH. as sections within the genus Scorzonera. The most complete and much changed system was given by LIPSCHIZ in two parts of this classical “Fragmente monographiae Scorzonera” (1935, 1939). The concept of the genus introduced by Lipschiz was accepted by many regional “Floras” (CHAMBERLAIN, 1975; CHATER, 1976; RECHINGER, 1977). According to CHATER (1976) the genus Scorzonera is represented by 28 specie...

Journal of Essential Oil Research

... Cambridge University Press, Cambridge pp. 300. Davis PH 1972. Flora of Turkey and the East Ae... more ... Cambridge University Press, Cambridge pp. 300. Davis PH 1972. Flora of Turkey and the East Aegean Islands, Vol 4. University Press, Edinburgh 431-432. Bernard, C., Clair, G. 1997. Essential oils of three Angelica L. species growing in France. Part I. Root Oils. J. Essent. ...

Periodicum Biologorum

Background and Purpose: Molecular approach has a major impact on phylogenetic studies of plants, ... more Background and Purpose: Molecular approach has a major impact on phylogenetic studies of plants, considering that it gives useful information about evolutionary events and relations on all taxonomic levels. The sequence data of the nuclear ITS and of two chloroplast regions, trnL-trnF spacer and rbcL gene, obtained from thirteen Globularia L. taxa, including five Anatolian endemics, representing six sections altogether, were analyzed in order to determine the relations between the European and the Anatolian species and get a better insight into the phylogeny of several closely related Globularia taxa. Materials and Methods: Total cellular DNA was extracted from fresh or frozen leaf tissue of thirteen Globularia samples. The ITS regions of nuclear DNA and two chloroplast DNA regions were amplified and sequenced. Obtained nuclear and combined plastid data matrices were subjected to Maximum Parsimony analyses. Results and Conclusions: Molecular data that were obtained in this study in...

African Journal of Biotechnology, 2010

EXCLI journal, 2012

The essential oil compound, fatty acid composition and the in vitro antioxidant activity of the r... more The essential oil compound, fatty acid composition and the in vitro antioxidant activity of the root and aerial of Glycyrrhiza echinata L., a medicinal plant growing in Turkey, have been studied. The antioxidant capacity tests were designed to evaluate the antioxidant activities of methanol extracts. Total phenolic and flavonoid concentrations of each extract were also determined by using both Folin-Ciocalteu reagent and aluminum chloride. The aerial part was found to possess the highest total phenolic content (146.30 ± 4.58 mg GAE/g) and total antioxidant capacity (175.33 ± 3.98 mg AE/g). The essential oil from root and aerial parts was analyzed by gas chromatography mass spectroscopy (GC-MS) systems. The major components identified were n-hexadecanoic acid, hexahydro farnesyl acetone, α-caryophyllen, hexanal and phytol. In fatty acid profiles of plant, palmitic, stearic, oleic and linoleic acid were detected as the main components. The results of this study have shown that the ext...

Turkish Journal of Botany, Jul 11, 2002

Tuzakl›, Otluk and Gidefi mountains are located in the West Toros Mountains within the borders of... more Tuzakl›, Otluk and Gidefi mountains are located in the West Toros Mountains within the borders of Antalya province. According to the grid square system used in the Flora of Turkey, the research area is located in the square C3. The altitude of the area is 500 m around Murtiçi on the western border of the area and 2427 m at the summit of E¤erbeli Hill (Fig. 1). The research area is bordered in the west by Gülen Mountain, in the north by Yal›nca and Musa mountains, in the east by Palaz, Karaçal and Mano¤lu mountains and in the south by Gündo¤mufl. The area lies wholly within the Mediterranean Phytogeographic Area, and in the province of Antalya. Five different vegetation types are seen in the area: macchie, forest, steppe, rock and scree. The macchie vegetation is found between 500 and 1000 m. It includes a lot of common tall scrubs such as Paliurus spina-christi Mill.

Journal of Selcuk University Natural and Applied Science, Dec 29, 2014

Two Asteraceae species, Centaurea verutum L. collected from Agri and Rhaponticoides ruthenica (La... more Two Asteraceae species, Centaurea verutum L. collected from Agri and Rhaponticoides ruthenica (Lam.) M.V.Agab. & Greuter collected from Gaziantep are new records for Turkey. These are described, illustrated and discussed. In addition; Psephellus yusufeliensis O.Tugay & Uysal is reduced to a synonym of Psephellus coruhensis A.Duran & M.Ozturk

The Journal of Essential Oil Research, 2007

In this study, the degraded forest vegetation of Dinek Mountain (Kırıkkale) was analysed by Braun... more In this study, the degraded forest vegetation of Dinek Mountain (Kırıkkale) was analysed by Braun-Blanquet's method. As a result of this study, two associations were described. All this associations are new to science. Associations and their higher units are as follows:

Turkish Journal of Botany, Jun 2, 2009

Centaurea L. (Asteraceae) is one of the largest genera in Turkey. The chromosome number and morph... more Centaurea L. (Asteraceae) is one of the largest genera in Turkey. The chromosome number and morphology of 8 taxa belonging to the genus Centaurea were investigated using an image analysis system. Among these taxa, the chromosome numbers were as follows: 2n = 18 in C. cariensis Boiss. subsp. niveotomentosa (Hub.-Mor.) Wagenitz, C. lycaonica Boiss. & Heldr., C. virgata Lam., and C. polyclada DC.; 2n = 24 in C. cyanus L.; 2n = 36 in C. virgata and C. cariensis Boiss. subsp. cariensis: 2n = 40 in C. urvillei DC. subsp. urvillei; 2n = 54 in C. tuzgoluensis Aytaç & H.Duman. In 5 taxa mixoploidy was observed (C. lycaonica, C. urvillei subsp. urvillei, C. cariensis subsp. cariensis, C. virgata, and C. tuzgoluensis). Based on karyotypic data for this genus, 3 basic chromosome numbers in Centaurea taxa were observed (x = 9, 10, and 12). Furthermore, ideograms are given for all the Centaurea taxa studied.

PhytoKeys, 2015

Klasea is a taxonomically complex genus in which there are many problems, mostly with Klasea kots... more Klasea is a taxonomically complex genus in which there are many problems, mostly with Klasea kotschyi and K. hakkiarica. It is challenging to differentiate the genera based on morphological characters alone. Revision studies performed on the basis of molecular data obtained from studies conducted in recent years have made the phylogenetic relationships and systematic positions of the taxa more apparent and reliable. In this study, Klasea, Serratula, Jurinea and Centaurea species native to Turkey, were collected from different localities of Anatolia and DNA was isolated from the collected samples. The data were analyzed ordination analyses including UPGMA and PCA using NTSYSpc 2.1. The infrageneric and intergeneric phylogenetic relationships between Klasea and other related genera were also characterized. The Klasea species were grouped into three clusters. It was determined that taxa Klasea kotschyi and K. hakkiarica are separate but closely related. Moreover, it was observed that the Klasea lasiocephala a separate group within the genera. Clearly the genera Klasea, Serratula, Jurinea and Centaurea are phylogenetically differentiated on the dendogram.