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Öğe Anatomical and palynological studies on Chaerophyllum astrantiae and C. aureum in Turkey(Academic Press, 2013) Yilmaz G.; Tekin M.In this study, anatomical and palynological properties of Chaerophyllum astrantiae Boiss. & Bal. and C. aureum L. were determined for the first time. Cross sections of roots, stems, stem leaves and fruits of both species were examined. The leaves are amphistomatic and mesophyll is bifacial. The fruit has two vittae on commissural face and four vittae on lateral and dorsal faces in both species. The palynological studies revealed that, C. astrantiae and C. aureum have tricolporate pollen type and perforate exine ornamentation under light microscope. Ratio of polar axis to equatorial axis is 2.15 in C. astrantiae and 2.05 in C. aureum. Thus, pollen shape is perprolate for both of the species.Öğe Chorological studies on Verbascum ovalifolium subsp. ovalifolium, subsp. thracicum and V. purpureum growing around Edirne(2007) Yilmaz G.; Dane F.In this study, morphological and chorological studies were made on V. ovalifolium Donn ex Sims subsp. ovalifolium, V. ovalifolium Donn ex Sims subsp. thracicum (Velen.) Murb and V. purpureum Hub- Mor. which are all rare taxa for the flora of Turkey. Descriptions of the species and descriptive illustrations scanned with BearPaw1200CUPlus (Mustek) were also given.Öğe Morphological and physiological effects of herbicide attribut (propoxycarbazone-sodium) and surfactant biopower (sodium alkylether-sulphate) on triticum aestivuml. CV. Pehlivan(2012) Yilmaz G.; Dane F.; Turan F.N.The goals of the study were to investigate morphological and physiological effects of herbicide Attribut (propoxycarbazone-sodium) and surfactant BioPower (sodium alkylether-sulphate) on Triticum aestivum L. cv. Pehlivan. For the experiments, Triticum aestivum were treated with Attribut at 4 different doses of 0.21, 0.42, 0.82 and 1.68 mM.. In order to evaluate the combined effects of BioPower and Attribut, 0.25% BioPower was added in each of applied Attribut doses. The laboratory studies showed that the EC (effective concentration) value corresponded to farmer value of (0.42 mM Attribut). Applications were done either by seed treatments or spreading. The toxic effects of each doses applied on wheat plants were monitored in terms of morphological and physiological parameters. STATISTICA AXA 7.1 statistical program which has number AXA507C775506FAN3 was used for statistical analysis. The results showed that root and shoot lengths during different growth periods of wheat and germination rates decreased, amounts of chlorophyll in leaves decreased while amount of protein in seeds increased with (0.82 mM Attribut), (0.82 mM Attribut + 0.25% BioPower) doses and more of that concentrations were found to be toxic for wheat plants. These toxic effects increased in use with BioPower. © by PSP.Öğe Oxalis europaea Jordan, O. stricta L. and O.corymbosa D.C. (Oxalidaceae): New records for the flora of Turkey(Institute of Botany and Botanical Garden "Jevremovac", University of Belgrade, 2015) Dane F.; Yalçin S.; Yilmaz G.In this study, three new species Oxalis europaea Jordan, O. stricta L. and O. corymbosa D.C. (Oxalidaceae) are recorded for the flora of Turkey with the specimens collected from A1(E) Edirne in European Turkey. Short morphological descriptions including photographs of the species are given. In addition, a new key that contains the new Oxalis species added to the flora of Turkey has been constructed. © 2015 Institute of Botany and Botanical Garden Jevremovac, Belgrade.Öğe Phytotoxic effects of six surfactants on Allium cepa L. plantlets(2012) Akbaş H.; Dane F.; Yilmaz G.; Öztürk F.; Leventer S.In this study, the effects of two anionic surfactants, sodium dodecyl benzene sulfonate (DBSNa) and sodium dodecyl sulfate (SDS), one meric and one dimeric cationic surfactant, cetyltrimethylammonium bromide (CTAB) and gemini surfactant (16-2-16), and two non-ionic surfactants, polyoxyethylene tert-octylphenyl ether (Triton X-100) and polyoxyethylene (23) lauryl ether (Brij 35) were evaluated under laboratory conditions using onions (Allium cepa L.) as test material. The phytotoxic effects of surfactant solutions were observed. The phytotoxic effects on roots were determined by measuring root elongations of onions for each day in a week under laboratory conditions at 16.0±0.5°C, after treated them by different surfactants. All surfactants used in this study were tested at three different concentrations, 5.00, 2.50 and 1.25 g/L (w/v), and some differences were observed between the effects of them. The phytotoxic effects were observed on onions which treated by anionic, cationic surfactants and nonionic surfactant Triton X-100. Stimulatory effects only occurred on onions treated by Brij 35 while inhibitory effects were observed on onions treated by all concentrations of Triton X-100. It was observed that inhibitory effects increased with increasing concentrations of Triton X-100. © by PSP.Öğe Phytotoxicity induced by herbicide and surfactant on stomata and epicuticular wax of wheat(2012) Yilmaz G.; Dane F.This study was performed in order to determine some of toxic effects of different doses of Attribut (propoxycarbazone-sodium) used in wheat fields and of BioPower (sodium alkylether-sulphate) surfactant added Attribut on epicuticular wax deposition and stomata on Triticum aestivum L. cv Pehlivan by scanning electron microscope. The doses used in the study were (0.42 mM Attribut) (Farmer Dose) (FD), (0.82 mM Attribut) (FD × 2), (1.68 mM Attribut) (FD×4) and the same doses including 0.25% of BioPower surfactant. Applications were done by seed and leaf treatments under field conditions. In SEM studies, in (FD × 2), (FD × 4), (FDS × 2) and (FDS × 4) applications, plasmolysis of the epiderma and morphological changes in the cuticle, unlike the control, were determined. It was observed in (FD × 2) and (FD × 4) applications that volumes of the stomata narrowed and they went into plasmolysis. In (FDS × 2) and (FDS × 4) applications, especially reduction in wax and alterations in wax crystals were determined.Öğe Respiratory syncytial virus epidemiology in Turkey(2005) Kanra G.; Tezcan S.; Yilmaz G.; Acunas B.; Aslan Ş.; Aslan Y.; Belet N.Respiratory syncytial virus (RSV) is the leading cause of lower respiratory tract infections in infants and young children worldwide. This study was conducted to determine the prevalence of RSV among high-risk children admitted with respiratory symptoms in a developing country. This is a multicenter study conducted among children less than 24 months of age and admitted to the hospital with respiratory symptoms. The inclusion criteria included: lower respiratory tract symptoms on admission, gestational age less than 35 weeks, and admission age less than six months, or children less than 24 months of age with a diagnosis of bronchopulmonary dysplasia requiring medical treatment or intervention during the last six months or with an uncorrected congenital heart disease (other than patent ductus arteriosus). Nasopharyngeal samples were obtained with one of the three standard methods: nasopharyngeal aspirate, nasopharyngeal wash or nasopharyngeal swab. RSV antigen was determined by enzyme immunoassay using Abbott TESTPACK RSV (No. 8100/2027-16). Statistical analysis was performed using Student's t-test and chi-square test. In this study, 332 children (135 females, 40.7%; 197 males, 59.3%) were included, and the nasopharyngeal specimens of 98 (29.5%) children were determined to be RSV-positive. There were no differences in sex, age of gestation, age of admission, family education, number of siblings and smoking at home for RSV-positive and -negative cases. Furthermore, underlying disease and duration of hospital and intensive care unit stay were similar among groups. Only otitis media was more common among RSV-positive cases. No fatality at hospital was recorded. Frozen samples revealed more negative results. Most cases presented during winter and the number of RSV-positive cases was higher in cold and economically poor areas. Premature children and children with underlying medical con dition acquire RSV irrespective of other sociodemographic risk factors, and most of them are hospitalized. Thus, an RSV vaccine seems the most effective mode of protection to decrease morbidity and mortality.Öğe Seed morphology studies on some Veronica L. species (plantaginaceae)with scanning electron microscopy(2013) Yilmaz G.In this study, the seed coat surfaces of Veronica bozakmanii M. A. Fischer, V. arvensis L., V. polita Fries, V. triphyllos L., V. hederifolia and V. cymbalaria which had grown in European Turkey were scanned by scanning electron microscope for the first time. Testa surface characteristics and micromorphological properties of examined Veronica species were determined and given comparatively which was important for the identification of the species systematically. © 2013 University of Bucharest.Öğe Verbascum samniticum Ten. (Scrophulariaceae): A new record for the flora of Turkey(2008) Yilmaz G.; Dane F.Verbascum samniticum Ten. (Scrophulariaceae) is recorded for the first time for the flora of Turkey with the specimen collected from A1 (E) Kirklareli. A description of the species and descriptive illustrations are given based on the collected specimen. Its relationship with V. phlomoides L. is discussed. © TÜBİTAK.
