Person: SEVGİ, ECE
15 results
Search Results
Now showing 1 - 10 of 15
Publication Open Access Factors Influencing Epiphytic Lichen Species Distribution in a Managed Mediterranean Pinus nigra Arnold Forest(2019-04-01) SEVGİ, ECE; YILMAZ, OSMAN YALÇIN; ÇOBANOĞLU, GÜLŞAH; TECİMEN, HÜSEYİN BARIŞ; SEVGİ, ORHAN; SEVGİ, ECEPublication Metadata only Ege Bölgesinde Geleneksel Kullanımı Olan Ağaç Türlerinin Yöresel Adları(2021-12-01) SEVGİ E.; AKKEMİK Ü.; SEVGİ, ECEPublication Open Access Anticholinesterase, antioxidant, antiaflatoxigenic activities of ten edible wild plants from Ordu area, Turkey(2018-06-01) Kurt, BELMA; GAZİOĞLU, IŞIL; SEVGİ, ECE; Sönmez, Fatih; ZENGİN KURT, BELMA; GAZİOĞLU, IŞIL; SEVGİ, ECETurkey has highly rich floras of medicinal and aromatic plants because of having various climate conditions in different regions. One of these regions is Middle Black Sea Region, especially Ordu Province. Extracts of 10 edible plants (Arum maculatum L., Hypericum orientale L., Ornithogalum sigmoideum Freyn et Sint., Silene vulgaris Garcke var. macrocarpa, Plantago lanceolata L., Achillea millefolium L. subsp. pannonica, Rumex crispus L., Rumex acetosella L., Capsella bursa-pastoris L., Coronopus squamatus Asch.), grown in Ordu, Turkey, were prepared with different solvents (hexane, ethanol and water, separately) and their anticholinestrase and antiaflatoxigenic activities were evaluated. Additionally, the cupric reducing antioxidant capacities (CUPRAC) and ABTS cation radical scavenging abilities of the extracts were assayed. The ethanol extract of R. acetosella exhibited the highest antioxidant activity (A0.5 value of 25.31 µg/mL, for CUPRAC activity; IC50 value of 23.73 µg/mL, for ABTS activity). The hexane extract of C. bursa-pastoris showed the strongest inhibition against AChE enzyme with IC50 value of 7.24 µg/mL, and the hexane extract of A. millefolium subsp. pannonica had the highest BChE activity with IC50 value of 6.40 µg/mL. The ethanol extract of P. lanceolata exhibited the strongest inhibition against aflatoxin with 88% inhibition.Publication Metadata only Karaçamın Geleneksel Kullanımı(Türkiye Ormancılar Derneği Yayın No: E/22/62, 2022-01-01) KIZILARSLAN HANÇER Ç.; SEVGİ E.; KIZILARSLAN HANÇER, ÇAĞLA; SEVGİ, ECEPublication Open Access Differential anti-proliferative and apoptotic effects of lichen species on human prostate carcinoma cells(2020-09-01T00:00:00Z) Goncu, Beyza; SEVGİ, ECE; KIZILARSLAN HANÇER, ÇAĞLA; Gokay, Guzin; ÖZTEN KANDAŞ, NUR; GÖNCÜ, BEYZA SERVET; SEVGİ, ECE; KIZILARSLAN HANÇER, ÇAĞLA; ÖZTEN KANDAŞ, NURLichens are stable symbiotic associations between fungus and algae and/or cyanobacteria that have different biological activities. Around 60% of anti-cancer drugs are derived from natural resources including plants, fungi, sea creatures, and lichens. This project aims to identify the apoptotic effects and proliferative properties of extracts ofBryoria capillaris (Ach.) Brodo&D.Hawksw,Cladonia fimbriata (L.) Fr.,Evernia divaricata (L.) Ach.,Hypogymnia tubulosa (Schaer.) Hav.,Lobaria pulmonaria (L.) Hoffm., andUsnea florida (L.) Weber ex Wigg. lichen species on prostate cancer cells. Lichen extracts were performed by ethanol, methanol, and acetone separately by using the Soxhlet apparatus and the effects of the extracts on cell viability, proliferation, and apoptosis were measured with the utilization of MTT, LDH assay, Annexin V assay, and Western Blot. Findings of our study revealed a positive correlation between the elevation of cell sensitivity and the increase in the treatment doses of the extract in that higher doses applied reverberate to higher cell sensitivity. A similar correlation was also identified between cell sensitivity elevation and the duration of the treatment. Evidence in our study have shown the existence of an anti-proliferative effect in the extracts ofBryoria capillaris,Evernia divaricata (L.) Ach.,Hypogymnia tubulosa (Schaer.) Hav.,Lobaria pulmonaria (L.) Hoffm., andUsnea florida (L.) Weber ex Wigg., while a similar effect was not observed in the extracts ofCladonia fimbriata.Evernia divaricatainduced anti-proliferative and apoptotic effects in PC-3 cells,whichinduced apoptotic cell death by both extrinsic and intrinsic pathways.Hypogymnia tubulosahas been shown to have anti-proliferative and apoptotic effects in all extractions methods and our findings identified that both the percentage of the apoptotic cells and apoptotic protein expressions recorded an increase at lower treatment concentrations. AlthoughLobaria pulmonariais known to have significant cytotoxic effects, we did not observe a decrease in cell proliferation. Indeed, proliferation marker proliferating cell nuclear antigen (PCNA) protein expression levels have shown an increase in all extracts, whileUsnea florida exhibitedapoptosis induction and slight proliferation reduction in extract treatments with lower concentrations. We tested 18 extracts of six lichen species during our study. Of these,Evernia divaricataandHypogymnia tubulosademonstrated significant apoptotic activity on prostate cancer cells including at low concentrations, which implies that it is worth pursuing the biologically active lead compounds of these extracts on prostate cancerin vitro. Further corroboratory studies are needed to validate the relative potential of these extracts as anti-metastatic and anti-tumorigenic agents.Publication Metadata only An ethnobotanical survey of medicinal plants in Biga (Çanakkale-Turkey)(2022-07-01) Sevgi E.; Kızılarslan Hançer Ç.; Akkaya M.; Altundağ E.; Büyükkılıç-Altınbaşak B.; SEVGİ, ECE; KIZILARSLAN HANÇER, ÇAĞLAPublication Metadata only Karaçam Kabuk Likenleri(Türkiye Ormancılar Derneği Yayın No: E/22/62, 2022-01-01) SEVGİ E.; SEVGİ, ECEPublication Metadata only EGE BÖLGESİNDE GELENEKSEL KULLANIMI OLAN AĞAÇ TÜRLERİNİN YÖRESEL ADLARI(2022-12-01) SEVGİ E.; AKKEMİK Ü.; SEVGİ, ECEPublication Metadata only Tree rings of Quercus ilex L. and their relationships with some wood anatomical features and growing site conditions in Türkiye(2023-01-01) AKKEMİK Ü.; YILMAZ H.; SEVGİ O.; ÇELİK ONAR H.; YILMAZ O. Y.; SEVGİ E.; Genç S.; AKARSU F.; Doğan Ö. H.; SEVGİ, ECEQuercus ilex (Holm oak) presents itself as trees up to 14–15 m tall in suitable growing site conditions and as shrubs in unsuitable areas. The purpose of this study was to determine the relationships between tree-ring widths of Q. ilex and vessel features, tree diameters, climate, and site conditions throughout Türkiye. A total of 1020 cores from 510 trees were collected from 102 sampled sites throughout Türkiye. After using standard dendroclimatology methods, all tree-ring analyses were performed on these chronologies. As a result, tree-ring boundaries were found to be less visible in Türkiye, like in other Mediterranean areas. Mean sensitivity ranged from 0.32 to 0.48 in different regions. Temperature during spring and summer months in the Mediterranean region has a negative effect on tree-ring widths in general. Winter temperature generally has a positive effect on tree-ring growth, and an increase in winter temperature may promote tree-ring width. Monthly total precipitation from November to July has a significant positive effect on tree-ring width and it is higher in the Aegean Region. While tree rings are wide in the trees found in lowlands, they are narrow in shrubs and at high elevations. There are clear negative relationships between tree-ring width and elevation, the amount of leaves in the litter, total litter amount, organic carbon, and soil pH. Regarding tree height, tree diameter, and vessel features, they have positive and high correlations with tree-ring width, except vessel frequency, which has a significant negative correlation. As a result of grouping, while the ratio of sites belonging to the dry group is low in regions that have trees with wide tree rings, the ratio of sites of the dry group is very high in İzmir and Datça, which have trees with narrow tree rings. The region with the widest rings is the Marmara Region, followed by the western Black Sea and the northern and southern Aegean, respectively. In conclusion, Q. ilex is a species that survives in both xeric and humid sites. It has adapted to dry conditions by forming narrow tree rings in Datça and continues to be found in tall bush-shrub forms with individuals over 140 years old. Specimens of the same age are in the form of trees with diameters of 50–60 cm and heights of 10–15 m in Ereğli. For these reasons, this species should be taken into consideration in afforestation and given priority in protection in its natural habitats where soil conditions are favorable, at a maximum distance of 23 km from the sea and in near-coastal areas.Publication Metadata only Türkiye Populasyonlarında Quercus ilex L. Meyve Morfolojisinin Çeşitliliğinin Belirlenmesi(2023-07-12) Sevgi E.; Yılmaz H.; Akkemik Ü.; Sevgi O.; Yılmaz O. Y.; SEVGİ, ECE