Browsing by Author "Aydin G."

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    Antioxidative and physiological responses of two sunflower (Helianthus annuus) cultivars under PEG-mediated drought stress
    (2012-11-12) Baloǧlu M.C.; Kavas M.; Aydin G.; Öktem H.A.; Yücel A.M.
    Drought stress is one of the most important yield-reducing factors in crop production. Sunflower, an oilseed crop, is severely affected by abiotic stress. In this study, 2 sunflower cultivars (Musala and Aydi{dotless}n) were evaluated in terms of various biochemical and physiological responses under 2 different polyethylene glycol-mediated drought stress conditions. Stress-determining parameters such as malondialdehyde (MDA), hydrogen peroxide (H2O2), and proline contents were determined. Both cultivars showed similar responses at osmotic potentials of both -0.4 and -0.8 MPa. Aydi{dotless}n was less affected than Musala under these stress conditions. MDA, H2O2, and proline levels were similar at both -0.4 and -0.8 MPa osmotic potentials in the 2 different cultivars. The 2 cultivars differed significantly in ascorbate peroxidase and catalase enzyme activities, which were more prominent in Aydi{dotless}n for both stress levels. However, glutathione reductase activity did not appear to be an essential part of the antioxidative system in either of the cultivars. Engineering antioxidative enzyme levels might provide a potential mechanism to cope with drought stress in sunflower. © TÜBİTAK.
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    Vector construction strategies for transformation of wheat plant
    (2013-07-08) Baloglu M.; Battal A.; Aydin G.; Eroglu A.; Oz M.; Kavas M.; Oktem H.; Yucel M.
    Gene cloning and vector construction for plant genetic transformation are routine procedures in plant functional genomic studies. The availability of effective transformation vector is one of the pre-requisites for plant transformation studies. Here, we describe the construction of a series of transformation vectors through different genetic engineering techniques for wheat transformation. For this purpose, NAC-type transcription factor genes TaNAC69-1andTtNAM-B2 were isolated from T. aestivum and T. turgidum, respectively. Then they were cloned into different types of cloning and expression vectors. Besides traditional restriction enzyme digestion and ligation method, Gateway cloning technology which is a fast and reliable alternative cloning method were used for construction of wheat transformation vectors. The transformation vectors constructed in this study are suitable for use in both particle bombardment (biolistic) and Agrobacterium based transformation protocols for wheat plant.