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Öğe Antioxidant Effect of Ethanolic Extract of Propolis in Liver of L-NAME Treated Rats(WROCLAW MEDICAL UNIV, 2015) Selamoglu, Zeliha S.; Ozdemir, Ilknur; Ciftci, Osman; Gulhan, Mehmet F.; Savci, AhmetBackground. The blocking of nitric oxide synthase (NOS) activity may cause vasoconstriction with formation of reactive oxygen species. Propolis is a natural product collected from plants by honeybees. Propolis has biological and pharmacological properties. Objectives. This study was designed to investigate the effects of propolis on catalase (CAT) activity, nitric oxide (NO) and malondialdehyde (MDA) levels in the liver tissues of NOS inhibited rats by N omega-Nitro-L-arginine methyl ester (L-NAME). Material and Methods. Rats were given a NOS inhibitor (L-NAME, 40 mg/kg, intraperitoneally) for 15 days to provoke hypertension and propolis (200 mg/kg, by gavage) the last 5 of the 15 days. Results. Nitric oxide levels in the liver tissue of the rats given L-NAME significantly decreased (p < 0.01). That parameter did not significantly alter in the liver of rats treated with propolis compared to the control group. CAT activity and MDA levels in the liver of the rats administrated L-NAME significantly increased compared to the control group (p < 0.01). These parameters significantly decreased in the liver of the rats given L-NAME + propolis compared to the L-NAME group (p < 0.01). Conclusions. The present data shows that L-NAME in the liver may enhance oxidative stress via inhibited nitric oxide synthase. Our results also suggest that this effect is suppressed by the antioxidant properties of propolis in the liver tissue of NOS inhibited ratsÖğe First Report of Neoscytalidium dimidiatum Causing Dieback, Shoot Blight, and Branch Canker of Willow Trees in Turkey(Amer Phytopathological Soc, 2019) Turkolmez, Sahimerdan; Dervis, Sibel; Ciftci, Osman; Serce, Cigdem Ulubas; Turkohmez, Cemile Gulden; Dikilitas, Murat[Abstract Not Available]Öğe First report of Phytophthora crown and root rot of cherry caused by Phytophthora palmivora in eastern Turkey(TAYLOR & FRANCIS INC, 2015) Turkolmez, Sahimerdan; Ciftci, Osman; Serce, Cigdem Ulubas; Dervis, SibelCrown and root rot or decline is an increasing problem on sweet cherry in Mardin, Malatya, Elaz and Diyarbakr provinces in eastern Turkey. A survey was carried out during 2012-2014 in 120 commercial cherry orchards for disease symptoms, which included poor growth with sparse off-colour foliage, reddish-brown discolouration of the crown and roots, wilting and dieback of the canopy, and in many cases, tree death. Fifty-eight Phytophthora isolates obtained during the course of this 3-year survey were examined and identified as Phytophthora palmivora on the basis of morphological characteristics. BLAST analysis of ITS region sequences of rDNA of five isolates revealed 99-100% identity with reference isolates of P. palmivora from GenBank and Phytophthora database. Isolates of P. palmivora were pathogenic on 12-month-old potted Mahaleb' cherry (Prunus mahaleb L.) rootstock seedlings that were wound-inoculated on the roots and on the crown. Inoculated plants expressed similar symptoms to those observed in the field and almost all infected plants died within 3 months after transplanting. This study demonstrated that P. palmivora is the causal agent of cherry decline in eastern Turkey. To our knowledge, this is the first report of P. palmivora on this host plant. ResumeLa pourriture du collet et des racines, ou deperissement, constitue un probleme croissant chez le cerisier sauvage dans les provinces de Mardin, de Malatya, d'Elaz et de Diyarbakr de l'est de la Turquie. Une etude a ete menee de 2012 a 2014 dans 120 vergers commerciaux afin de deceler les symptomes de la maladie qui incluent la croissance mediocre accompagnee d'un feuillage clairseme de couleur atypique, la coloration brun-rougeatre du collet et des racines, le fletrissement et le deperissement de la cime et, dans plusieurs cas, la mort de l'arbre. Durant les trois annees qu'a dure cette etude, 58 isolats de Phytophthora ont ete examines et identifies, sur la base de leurs caracteres morphologiques, en tant que Phytophthora palmivora. L'analyse de type BLAST des sequences de l'espaceur transcrit interne de l'ADNr de cinq isolats a revele un taux d'identite de 99% a 100% par rapport aux isolats de reference de P. palmivora provenant de la GenBank et de la Phytophthora database. Les isolats de P. palmivora etaient virulents a l'egard de jeunes plants en pots de 12 mois sur porte-greffe de cerisier Mahaleb' (Prunus mahaleb L.) dont des blessures aux collets et aux racines avaient ete inoculees. Les plants inocules ont affiche des symptomes semblables a ceux observes sur le terrain, et presque tous les plants sont morts en moins de trois mois apres avoir ete transplantes. Cette etude a demontre que P. palmivora est l'agent causal du deperissement des cerisiers dans l'est de la Turquie. Pour autant que nous le sachions, il s'agit de la premiere mention de P. palmivora s'attaquant a cette plante hote.Öğe Phytophthora Crown and Root Rot of Apricot Caused by Phytophthora palmivora in Turkey(WILEY-BLACKWELL, 2015) Turkolmez, Sahimerdan; Ciftci, Osman; Canihos, Ercan; Serce, Cigdem U.; Dervis, SibelForty-nine Phytophthora isolates were obtained from roots and crown of apricot trees with symptoms of decline grown in commercial orchards in Malatya, Elaz and Diyarbakr provinces, Turkey, in 2011 and 2013. All of the recovered isolates were identified as Phytophthora palmivora on the basis of morphological characteristics. Blast analysis of ITS region sequences of rDNA of 5 isolates revealed 100% identity with a reference isolates of P.palmivora from GenBank. Isolates of P.palmivora were pathogenic on 12-month-old wild apricot rootstock Zerdali' plants that were wound inoculated on the roots and on the crown. This study demonstrated that P.palmivora is the cause of the crown and root rot found on apricot in Turkey. To our knowledge, this is the first report of P.palmivora on this host plant.Öğe Phytopythium litorale: A Novel Killer Pathogen of Plane (Platanus orientalis) Causing Canker Stain and Root and Collar Rot(Amer Phytopathological Soc, 2020) Dervis, Sibel; Turkolmez, Sahimerdan; Ciftci, Osman; Ozer, Goksel; Serce, Cigdem Ulubas; Dikilitas, MuratDecline symptoms associated with lethal stem and branch canker stain along with root and collar rots were observed on 5- to 7-year-old roadside oriental plane trees (Platanus orientalis) in Diyarbakir, Turkey. Aboveground symptoms included leaf necrosis, leaf curling, extensive bluish or blackish staining of shoots, branches, stem bark, and wood surfaces, as well as stem cankers and exfoliation of branch bark scales. A general decline of the trees was distinctly visible from a distance. A Phytophthora/Pythium-like oomycete species with globose to ovoid, often papillate and internally proliferating sporangia was consistently isolated from the fine and coarse roots and stained branch parts and shoots. The pathogen was identified as Phytopythium litorale based on several morphological features. Partial DNA sequences of three loci, including nuclear rDNA internal transcribed spacer (ITS) and the large ribosomal subunit (LSU), and mitochondrial cytochrome c oxidase subunit II (coxII) confirmed the morphological identification. All P. litorale isolates were homothallic, developing gametangia, ornamented oogonia with elongate to lobate antheridia. Pathogenicity of P. litorale was tested by inoculation on excised shoots and by root inoculation on seedlings. P. litorale produced large lesions and blights on shoots in just 5 days and killed 100% of the seedlings in a month. This paper presents the first confirmed report of P. litorale as an important pathogen on a plant species causing branch and stem cankers, and root and collar rot, in and on P. orientalis, resulting in a rapid decline of trees and suggesting a threat to plane.Öğe Role of propolis on biochemical parameters in kidney and heart tissues against L-NAME induced oxidative injury in rats(INFORMA HEALTHCARE, 2014) Talas, Zeliha Selamoglu; Ozdemir, Ilknur; Ciftci, Osman; Cakir, Oguz; Gulhan, Mehmet Fuat; Pasaoglu, Oguz MuratNitric oxide (NO), produced by endothelial NO synthase, is recognised as a central antiinflammatory and antiatherogenic principle in the vasculature. Epidemiological and clinical studies have demonstrated that a growing list of natural products, as components of the daily diet or phytomedical preparations, may improve vascular function by enhancing NO bioavailability. In this article, we investigated antioxidant effects of propolis on biochemical parameters in kidney and heart tissues of acute NO synthase inhibited rats by N-omega-nitro-L-arginine methyl ester (L-NAME). There was increase (p < 0.001) in the activities of catalase and malondialdehyde levels in the L-NAME treatment groups when compared with control rats, but NO levels were decreased in both kidney and heart tissues. There were statistically significant changes (p < 0.001) in these parameters of L-NAME + propolis treated rats as compared with L-NAME-treated group. In summary, propolis may influence endothelial NO production.Öğe Role of Propolis on Oxidative Stress in Fish Brain(Iran Univ Medical Sciences, 2013) Kakoolaki, Shapour; Talas, Zeliha Selamoglu; Cakir, Oguz; Ciftci, Osman; Ozdemir, IlknurIntroduction: Cypermethrin causes its neurotoxic effect through voltage-dependent sodium channels and integral protein ATPases in the neuronal membrane. Brain and nerve damage are often associated with low residual level of pesticides. In vitro and in vivo studies have also shown that pesticides cause free radical-mediated tissue damage in brain. Propolis has antioxidant properties. The main chemical classes found in propolis are flavonoids and phenolics. Bioflavonoids are antioxidant molecules that play important roles in scavenging free radicals, which are produced in neurodegenerative diseases and aging. Methods: To determine the protective role of propolis, rainbow trouts were treated with cypermethrin, followed by biochemical analyses of brain tissue. Fish were divided into four groups: control, propolis-treated, cypermethrin-treated, and cypermethrin+propolis-treated. Results: In fish brains, catalase (CAT) activity decreased (P=0.001) and malondialdehyde (MDA) level increased (P=0.001) in cypermethrin-treated group compared to control group. In cypermethrin+propolis-treated group CAT activity increased (P=0.001) and MDA level decreased (P=0.001) compared to cypermethrin group. Discussion: The results demonstrated that the negative effects, observed as a result of cypermethrin treatment, could be reversed by adding supplementary propolis. Propolis may improve some biochemical markers associated with oxidative stress in fish brain, after exposure to cypermethrin.Öğe Survey of Turkish Strawberry Production Areas for Soil-borne Fungal Diseases(Amer Soc Horticultural Science, 2015) Bildik, Mehmet Naci; Serce, Cigdem Ulubas; Dervis, Sibel; Turkolmez, Sahimerdan; Ciftci, Osman; Serce, Sedat[Abstract Not Available]
