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Articles by Berna Bas
Total Records ( 3 ) for Berna Bas
  Mehmet Ozaslan , Turkan Aytekin , Berna Bas , I. Halil Kilic , I. Didem Afacan and D.S. Dag
  Cucurbit growing is affected negatively due to diseases caused by cucurbit viruses. In order to prevent this damage cucurbit viruses were identified by serologically. Due to this study, it is usually difficult to give definitive diagnosis based on symptoms but occasionally symptoms; are curling, wrinkling, spot mosaics, yellowing, shape deformation on leaves, smaller leaves than normal, buff-colored mosaics, observed on younger leaves of cucurbits and stunting , distortion and fruit deformation on the plants. After this, samples collected and taken to laboratory to determine the virus which caused this symptoms and DAS -ELISA tests were performed to determine CMV (Cucumber mosaic virus), CABYV (Cucurbit aphid borne yellow mosaic virus), ZYMV (Zucchini yellow mosaic virus), ToMV (Tomato mosaic virus), PMMV (Pepper mild mottle virus), PXV (Potato X virus), PYV (Potato Y virus) on the samples collected during July-August in 2004. At the end of this test out of 56 samples, 10 were found to be infected with one or more virus. As a result of this study 20 samples were infected by CMV and 22 samples were infected by ZYMV and 3 samples were infected by PVY.
  Berna Bas and Namik Kemal Koc
  Embryogenic callus of Kütdiken lemon highly sensitive to Phoma tracheiphila was successfully used for selection via in vitro tolerance to diluted toxin of Phoma tracheiphila. Twenty four callus masses were obtained after six consecutive subcultures on the medium supplemented with toxin and then these callus clusters selected were dual cultured with Phoma tracheiphila, Penicillium italicum, P. digitatum, Phytophthora citrophthora, Colletotrichum gloeosporioides, Phomopsis citri, Diplodia natalensis and Geotrichum candidum. One stable resistant callus mass was selected and labeled as Kütdiken lemon 20b. The fungal growth of Phoma tracheiphila was strongly inhibited by culture liquid of Kütdiken lemon 20b cell suspension cultures in coculture experiment comparing to sensitive Kütdiken lemon and moderate resistant Zagara Bianca. In addition, the same boiled liquid has inhibited the fungal growth. By these results, rather than any PR proteins as inhibitors to fungal development, an alternative cause for defense reaction may be secondary metabolites which are toxic to the fungus.
  Mehmet Ozaslan , Berna Bas , Turkan Aytekin and Zeynep Sigirci
  Pepper growing are negatively affected due to the diseases caused by pepper viruses in Gaziantep. In order to avoid the damage of pepper viruses, survey was performed in Nurdagi and Islahiye districts of Gaziantep province located in southeastern Anatolia. The symptoms observed on pepper plants in yards were consisted of mosaic and curling, vein clearing, chlorotic and necrotic spot, fruit and leaf deformations. In October 2001, samples were collected and performed biological and serological assays. TMV and CMV were determined as responsible agent of these symptoms. GAP (Güney-Dogu Anadolu Projesi = Southeastern Anatolia Project) is one of the most important agricultural recovery projects of Turkey. One of GAP inclusion is Gaziantep become a leading producer of pepper in Turkey. Although damage by viruses is yet very below threshold level, an effective control strategies should be now argued to avoid from possible virus problems in longer term.
 
 
 
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