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GÜLERYÜZ, GÜRCAN

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GÜLERYÜZ

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GÜRCAN

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2015 - 201912020 - 20212
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    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-5982-2024
    Hypericum 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.
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    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-5602-2024
    The 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.
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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-3362-2022
    Verbascum 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.