Person: GÜLERYÜZ, GÜRCAN
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GÜLERYÜZ
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GÜRCAN
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Publication Ni-induced changes in nitrate assimilation and antioxidant metabolism of verbascum olympicum Boiss.: Could the plant be useful for phytoremediation or/and restoration purposes?(Taylor & Francis, 2015-01-01) Akpınar, Ayşegül; Arslan, Hülya; Güleryüz, Gürcan; Kırmızı, Serap; Erdemir, Ümran Seven; Güçer, Şeref; AKPINAR, AYŞEGÜL; ARSLAN, HÜLYA; GÜLERYÜZ, GÜRCAN; KIRMIZI, SERAP; SEVEN ERDEMİR, ÜMRAN; Güçer, Şeref; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü.; Uludağ Üniversitesi/Gemlik Asım Kocabıyık Meslek Yüksekokulu.; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü.; 0000-0001-5441-037X; 0000-0003-3243-9168; 0000-0003-0610-2019; 0000-0002-2680-9815; 0000-0002-4606-0645; AAQ-8139-2021; D-2584-2016; A-5538-2019; HJY-1959-2023; Q-5688-2017; IVM-2806-2023; GAV-3362-2022Verbascum olympicum Boiss. (Scrophulariaceae) were studied as a candidate plant for remediating the Ni polluted soils. The metabolic responses, such as nitrate assimilation (nitrate reductase and glutamine synthetase activity) and antioxidant system activity [superoxide dismutase (SOD), catalase (CAT) and ascorbate peroxidase (APX) activity], of this species exposed to nickel in Hoagland's nutrient medium were investigated as remediation performance parameters. The accumulation of nickel and the variations in the content of some elements (B, Cu, Fe, Mg, Mn, Mo and Zn) and some growth parameters, such as the water content, biomass production, and contents of chlorophyll and soluble protein, were also examined. The accumulation of Ni in both the roots and leaves varied depending on the exposure times and doses. Increased oxidative stress was suggested by the increases in the activities of SOD, CAT and APX. Although some element contents were inhibited by Ni treatments, these inhibitory effects was decreased depending on the time, and even these elements are accumulated in roots. These results are the novelties in the use of this species in biotechnology.Publication Breaking of dormancy in the narrow endemic Jasione supina Sieber subsp. supina (Campanulaceae) with small seeds that do not need light to germinate(University of Zagreb, Faculty of Science, Division of Biology, 2021-01-01) Güleryüz, Gürcan; Kırmızı, Serap; Arslan, Hülya; Güleryüz, Elif; GÜLERYÜZ, GÜRCAN; KIRMIZI, SERAP; ARSLAN, HÜLYA; GÜLERYÜZ, ELİF; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü.; Bursa Uludağ Üniversitesi/Gemlik Asım Kocabıyık Meslek Yükseokulu/Bahçe Tarımı Programı.; 0000-0001-5441-037X; 0000-0002-2680-9815; A-5538-2019; D-2584-2016; IVM-2806-2023; KAK-5602-2024The germination properties of Jasione supina Sieber subsp. supina (Campanulaceae), which is endemic to Mount Uludag, Bursa, Turkey, were determined. In this study, we investigated the effects of GA(3), the combination of hormone series and short-term moist chilling (1-month), and long-term moist chilling (4-month) on the germination percentage and mean germination time in relation to seed dormancy breaking. All treatment series were incubated under continuous dark (20 degrees C, 24 h) and light/dark (20/10 degrees C, 12/12 h) conditions. Seeds were collected from specimens widespread on the alpine and subalpine grasslands and dwarf shrubs of Mount Uludag (1800-1900 m a.s.l.). Depending on the concentration, GA(3) and the combination of hormone and moist chilling treatments promoted seed germination in both dark and light/dark conditions. After 4-month-moist chilling treatment, seeds germinated 27% in a light/dark and 80% in a dark regime. Hormone and moist chilling treatments reduced the mean germination time. Our results showed that J. supina seeds have physiological dormancy, require prolonged times of moist chilling and preferentially complete germination in darkness.Publication Effects of pretreatments on seed dormancy and germination in endemic uluda flax ( linum olympicum boiss.) (linaceae)(Korean Soc Horticultural Science, 2018-10-01) KIRMIZI, SERAP; Güleryüz, Gürcan; GÜLERYÜZ, GÜRCAN; Arslan, Hülya; ARSLAN, HÜLYA; Bursa Uludağ Üniversitesi/Fen Edebiyat Fakültesi/Biyoloji Bölümü.; Bursa Uludağ Üniversitesi/Gemlik Asım Kocabıyık Meslek Yüksekokulu.; 0000-0001-5441-037X; A-5538-2019Linum olympicum Boiss. (Linaceae) is an endemic species to Turkey, and has both medicinal and ornamental properties. In this study, we investigated the effects of GA(3) and cold stratification (1 or 4months) on the germination and mean germination time in relation to breaking dormancy in this species under darkness (20 degrees C) and light (20/10 degrees C, 12/12h) conditions. Seeds were collected from specimens that spread on limestone or granite screes, ledges of rocky or turfy slopes, and hilltops of the alpine belt from Uluda Mt. (Bursa, Turkey, 2200-2300m). We show that a combination of hormone and cold stratification treatments promoted seed germination under darkness and light conditions. Non-stratified seeds germinated to 73% following 1000mgL(-1) GA(3) treatment and also it was 83% after 1month cold stratification. After 4months of cold stratification treatment, 10% and 53.3% of seeds successfully germinated after incubation in light and dark conditions, respectively. Hormone and cold stratification treatments also reduced mean germination time. Our results revealed that seeds of L. olympicum have physiological dormancy and require prolonged time for cold stratification and darkness for germination, rather than responding to the photoperiod. Germination requirements of L. olympicum have not been studied previously, and the data obtained could be used for the ex situ protection of this alpine species.Publication Effects of pre-treatments in relation to breaking of dormancy of endemic Hypericum adenotrichum Spach. seeds(Elsevier, 2021-09-06) Güleryüz, Gürcan; Kırmızı, Serap; Arslan, Hülya; Bayrak, Merve; GÜLERYÜZ, GÜRCAN; KIRMIZI, SERAP; ARSLAN, HÜLYA; Bayrak, Merve; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji Bölümü.; Bursa Uludağ Üniversitesi/Gemlik Asım Kocabıyık Meslek Yüksekokulu.; 0000-0001-5441-037X; 0000-0002-2680-9815; A-5538-2019; D-2584-2016; IVM-2806-2023; KDB-5982-2024Hypericum adenotrichum Spach. (Hypericaceae, Clusiaceae) is an endemic species to Turkey, which is one of the commonly used species in pharmacological research. We studied seed germination characteristics. The effects of dry storage (3, 9, 12 month), moist chilling (3, 6, 9, 12 month), scarification (H2SO4, sand paper), tap water, hormone (250, 500, 1000 ppm GA(3)), different temperature (15/10, 20/10 and 25/15 degrees C) and light (photoperiod, darkness) treatments on seed germination of H. adenotrichum seeds collected from subalpine belt of Uludag Mountain were examined. Favourable germination temperature for H. adenotrichum is 20/10 degrees C and no light is required for the seed germination. Seeds of species have physiological dormancy. GA(3) without any other treatment was not successful enough to break the dormancy status alone. Scarification by sulphuric acid and 1000 ppm GA(3) combination is the most effective way for germination of H. adenotrichum seeds. Germination requirements of H. adenotrichum have not been studied previously and the data obtained could be used in the exsitu protection of H. adenotrichum.