Search Results

11 results

  1. Bull. Spec. CORESTA Congress, Harare 1994, p. 129, PPOST 1

    Resistance to four diseases in tobacco somaclones NC89-TT and NC89-V1 regenerated from toxin-stressed tissue culture of cv. NC89, and unstressed tissue culture of its resistant derivative

    LIU A.; ZHANG C.; DONG H.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    Tobacco somaclone NC89-TT was obtained from the flue-cured cv. NC89 from tissue culture challenged by AT-toxin of brown spot pathogen Alternaria alternata, and somaclone NC89-V1 was obtained from tissue cultures of plants previously inoculated with ...
  2. Bull. Spec. CORESTA Congress, Harare 1994, p. 130, PPOST 2

    Cell wall components of non-pathogenic bacteria and hypovirulent Alternaria alternata responsible for induction of tobacco resistance to brown spot

    LIU A.; ZHANG C.; DONG H.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    Different components of cell walls of non-pathogenic Pseudomonas fluorescens P1 and hypovirulent TBA16 of Alternaria alternata were tested for inducing resistance to brown spot. Behaviors of virulent strain TBA28 of the pathogen on tobacco leaf surfaces ...
  3. Bull. Spec. CORESTA Congress, Harare 1994, p. 131, PPOST 3

    Resistance of tobacco to fungal, bacterial, and virus diseases induced by five factors

    DONG H.; LIU A.; ZHANG C.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    Induced resistance of tobacco to brown spot, black lowering (Colletotrichum sp.), black shank, wildfire, and TMV was tested in a greenhouse and in field plots where the inducers were the hypovirulent strain TBA16 of Alternaria alternata, non-pathogenic ...
  4. Bull. Spec. CORESTA Congress, Harare 1994, p. 132, PPOST 4

    Resistance of tobacco to brown spot induced by viruses and transferability of the induced resistance to the regenerated plants and their progenies via tissue culture

    DONG H.; LIU A.; ZHANG C.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    The function of viruses to induce tobacco resistance to brown spot and transfer of the induced resistance to the tissue culture-regenerated plants and their progenies were studied. Five viruses (CMV, TVBMV, PVY necrotic strain PVY-T1, satellite SV52 of ...
  5. Bull. Spec. CORESTA Congress, Harare 1994, p. 133, PPOST 5

    Induction of contact recognition as related to host-induced resistance in tobacco brown spot

    DONG H.; LIU A.; ZHANG C.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    Tobacco leaf surfaces which had been pretreated with non-pathogenic bacteria, viruses, and hypovirulent strains of brown spot pathogen (Alternaria alternata), or a virulent strain of A. alternata showed seven types of abnormal pre-infection behavior: (1) ...
  6. Bull. Spec. CORESTA Congress, Harare 1994, p. 134, PPOST 6

    A preparation SRS2 based on induced resistance: its functions of controlling brown spot and improving economic and qualitative properties of tobacco

    DONG H.; LIU A.; ZHANG C.
    Shandong Agricultural University, Dept. of Plant Protection, Taian, Shandong, China
    SRS2, a preparation for resistance induction in tobacco, was made from cell wall components of Alternaria alternata spores and combined with the chemical ID1 as a resistance inducer. In greenhouse experiments, SRS2 induced over 50% resistance and nearly ...
  7. Bull. Spec. CORESTA Congress, Harare 1994, p. 138, PPOST 11

    Overcoming the non-crossability between N. rustica var. Brasilia L. and N. tabacum - creation of wild fire resistant F1 hybrids

    KRUSTEVA D.
    D. Kostov Inst. of Genetics, Bulgarian Academy of Sciences, Sofia, Bulgaria
    The purpose of the present investigation is the overcoming of the non-crossability between species N. rustica var. Brasilia (2n = 48) and N. tabacum (2n = 48) to create of wild fire resistant tobacco hybrids and lines. The initial material used for ...
  8. Bull. Spec. CORESTA Congress, Harare 1994, p. 142, PPOST 15

    Investigation of cytoplasmic-nuclear interactions and manifestation of cytoplasmic male sterility in tobacco

    NIKOVA V.; VLADOVA R.; PANDEVA R.; SHABANOV D.; NIKOLOV E.; KANEVA S.
    Bulgarian Academy of Science, Institute of Genetics, Sofia, Bulgaria.
    Cytoplasmic male sterility (CMS) is defined as the inability to produce functional pollen with preservation of normal female fertility. CMS in tobacco is caused by a combined action of nuclear genes and extrachromosomal factors and is an useful tool for ...