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  1. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 175, P18, ISSN.0525-6240

    Isogenic lines of the tobacco cultivar Harmanliska basma 163 possessing the Nt gene controlling resistance to the tobacco mosaic virus (TMV) strain of the Tomato/Nicotiana virus I Smith

    PALAKARTCHEVA M.; KRESTEVA D.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The aim of our studies was to create isogenic lines of the Harmanliska basma 163 cultivar, possessing the Nt gene which controls the resistance of tobacco to Nicotiana virus I Smith. Simultaneously with this investigation, we also studied the...
  2. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 183, PP01, ISSN.0525-6240

    Biochemical study of tobacco tested under"test-cotyledon"conditions : Effects of magnesium, reactions of plants resistant and sensitive to Peronospora tabacina. Cytochemical study of Callose

    GEORGIEVA I.D.; DELON R.; COUSSIRAT J.C.; EDREVA A.M.
    Institute of Genetics, Sofia, Bulgaria; Institut Expérimental du Tabac, Bergerac, France
    Tobacco obtained under cotyledon test conditions was inoculated with P. tabacina Adam conidia. The presence of callose deposits was detected in the cell walls of three genotypes. In the sensitive type, there was no formation of callose papillae in...
  3. Ann. Tabac, 1987, Sect. 2, num. spéc., p. 93-104., ISSN.0399-0354

    A biochemical study of tobacco subjected to "cotyledon-test" : effect of magnesium, reactions of resistant and non resistant plants to Peronospora tabacina. IV - A biochemical and cytochemical study of the beta-glucosidase

    EDREVA A.; GEORGIEVA J.D.; COUSSIRAT J.C.
    Institut of Genetics - Sofia, Bulgaria
    The beta-glucosidase (E.C. 3.2.1.20) activity of tobacco cotyledons infected with P. tabacina was investigated using chemical and cytochemical methods in the early phases of the disease before the appearance of symptoms. It was shown that the...
  4. Bull. Spec. CORESTA Congress, Guangzhou 1988, p. 141, P-14

    A preliminary study on the fungus resistance and toxin tolerance of the black shank resistant mutant R400

    ZHOU J.M.; ZHOU J.P.
    Chinese Academy of Science, Institute of Genetics, Beijing, China
    R400 is the first mutant resistant to black shank selected from"Small Golden", a variety highly susceptible to black shank, for toxin tolerance through anther culture. The disease resistance of callus and toxin tolerance of callus and protoplasts...
  5. Bull. Spec. CORESTA Congress, Guangzhou 1988, p. 144, P-18

    Behaviour of a set of species or the genus Nicotiana and various varieties of tobacco versus powdery mildew (E. cichoracearum) in Bulgaria and in France

    PALAKARTCHEVA M.; KRUSTEVA D.; DELON R.
    (1) Institute of Genetics, Sofia, Bulgaria; (2) SEITA, France
    The pathogenicity and physiological specialization of Erysiphe cichoracearum, the agent responsible for tobacco powdery mildew have been studied in Bulgaria and in France. Inoculations were performed, using young plants obtained under conditions in...