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24 results

  1. Ann. Tabac, 1997, Sect. 2-29, p. 54-9., ISSN.0399-0354

    Induction of acidic pathogenesis-related (PR-1) proteins in Erysiphe cichoracearum D.C.-infected tobacco leaves

    EDREVA A.; COUSSIRAT J.C.; DELON R.
    D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria
    It is demonstrated that in N. tabacum leaves acidic pathogenesis-related (PR-1) proteins are induced by the obligatory ectoparasitic fungus Erysiphe cichoracearum, causative agent of tobacco powdery mildew. No difference was shown between the responses of ...
  2. CORESTA Meeting, Agronomy/Phytopathology, Montreux, 1997, PT9

    Variability of Peronospora tabacina: an isoenzyme study

    EDREVA A.; DELON R.; COUSSIRAT J.C.
    (1) D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria. (2) SEITA, lnstitut du Tabac, Bergerac, France
    The variability of P. tabacina A. populations was studied using the isoenzyme polymorphism of peroxidase, malate dehydrogenase and superoxidismutase. P. tabacina conidia from N. tabacum crops cultivated in distant areas of Europe (France-Bulgaria) were ...
  3. Ann. Tabac, 1993, Sect. 2-25, p. 1-6., ISSN.0399-0354

    Genetic fingerprinting of tobacco by RAPD. Use of markers to screen somatic hybrids between Nicotiana tabacum and Nicotiana rustica L

    COUSSIRAT J.C.
    SEITA, Institut du Tabac, Bergerac, France
    The identification of somatic hybrids between Nicotiana tabacum and Nicotiana rustica can be carried out using polymerase chain reaction (PCR) and four primers of short sequence to direct an amplification of DNA. Each primer amplifies specifically the ...
  4. Bull. Spec. CORESTA Congress, Jerez de la Frontera, 1992, p. 58, AP12, ISSN.0525-6240

    Blue mold of tobacco : Biochemical and molecular mechanisms

    EDREVA A.; GEORGIEVA I.D.; COUSSIRAT J.C.; DELON R.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Biochemical and molecular mechanisms underlying the pathogenesis of blue mold in tobacco are investigated. Profound shifts in the metabolism of diseased plant are established, related to enzymes with oxidative, hydrolytic and phenol synthesizing functions ...
  5. Ann. Tabac, 1989, Sect. 2-22, p. 95-101., 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. VII. A cytochemical study of the callose deposition

    GEORGIEVA I.D.; DELON R.; COUSSIRAT J.C.
    Institut of Genetics - Sofia, Bulgaria
    The callose deposition on the cell walls of one susceptible and two resistant tobacco varieties, infected with P. tabacina Adam was investigated using the fluorescent technique. It was established that the callose papillae didn't appear in the ...