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9 results

  1. Ann. Tabac, 1997, Sect. 2-29, p. 27-32., 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. VIII. A cytochemical study of lignin and phenolics

    GEORGIEVA I.D.; DELON R.; EDREVA A.
    D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria
    The cytochemical localisation of lignin and phenolics in P. tabacina-infected susceptible and resistant tobacco genotypes was investigated. The work was carried out with seedlings grown according to the cotyledon test as a model system. It involved a Knop ...
  2. 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 ...
  3. Ann. Tabac, 1998, Sect. 2-30, p. 3-9., ISSN.0399-0354

    Possible relation between tobacco resistance to aphids (Myzus nicotianae Blackman) and phenolic compounds in glandular trichomes and leaf epidermis

    GEORGIEVA I.D.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    The localization of various phenolic compounds in tobacco leaves and their influence on the degree of infestation by aphids (Myzus nicotianae Blackman) were assessed. The leaves of both immune and resistant tobacco lines from the interspecific ...
  4. Ann. Tabac, 1991, Sect. 2-23, p. 75-9., ISSN.0399-0354

    Isogenic lines of Harmanliska Basma 163 tobacco having a Nt gene controlling the resistance vis-à-vis the virus of tobacco mosaic (TMV) tomato strain (Nicotiana Virus I Smith)

    PALAKARTCHEVA D.; KRUSTEVA D.
    Institut of Genetics - Plant Breeding, Sofia, Bulgaria.
    The aim of this research is to create isogenic lines of the variety Harmanliska basma 163, with a Nt gene controlling the resistance of tobacco to Nicotiana virus I Smith. At the same time a study of the comportment of the Nt gene, as well as those which ...
  5. Ann. Tabac, 1991, Sect. 2-23, p. 81-7., ISSN.0399-0354

    Genetic study of Erysiphe cichoracearum D.C. resistance of PMR Burley 21 cultivar and some morphological characters that influence the tobacco yield

    TOUNKARA F.; PALAKARCHEVA M.
    Institut of Genetics - Plant Breeding, Sofia, Bulgaria.
    The aim of the present investigation is to study the genetic control of Erysiphe cichoracearum resistance of PMR Burley 21 cultivar, coming from N. tabacum. At the same time the inheritance of some quantitative characters was studied, that influence the ...
  6. 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 ...
  7. 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 beta ...