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    Wyświetlanie 1-3 z 3
    Tytuł:
    Potential use of RAPD markers in characteristics of cucumber [Cucumis sativus L.] haploids and double-haploids
    Autorzy:
    Smiech, M
    Sztangret-Wisniewska, J.
    Galecka, T.
    Korzeniewska, A.
    Marzec, L.
    Kolakowska, G.
    Piskurewicz, U.
    Niemirowicz-Szczytt, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/58055.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    haploid development
    Pseudoperonospora cubensis
    haploid
    production method
    tolerance
    cucumber cultivar
    double-haploid
    random amplified polymorphic DNA
    Cucumis sativus
    cucumber
    Opis:
    A study was designed to obtain hapolid and double haploid (DH) plants from cucumber cultivars tolerant to Pseudoperonospora cubensis. The main goal was to identify RAPD molecular markers associated with downy mildew resistance. On average, 20% of embryos generated in two experiments, were converted to haploid plants. RAPD markers that differentiated susceptible and resistant H and DH plants were identified. Somaclonal variation in DH lines was seldom detected.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of salt and water stresses on growth, nitrogen and phosphorus metabolism in Cucumis sativus L. seedlings
    Autorzy:
    Sacala, E
    Demczuk, A.
    Grzys, E.
    Spiak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/57642.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    salt stress
    seedling
    nitrogen
    growth
    salinity
    Cucumis sativus
    cucumber
    osmotic stress
    water stress
    phosphorus
    Opis:
    Plants exposed to osmotic stress exhibit changes in their physiology and metabolism. In general, osmotic stress reduces water availability and causes nutritional imbalance in plants. In the present study, we compared the response of cucumber (Cucumis sativus L. var. Władko F-1) to ionic (100 mmol•dm-3 NaCl) and osmotic stress (10% PEG 6000). Both stress factors reduced significantly fresh and dry weight of 7-day-old cucumber seedlings. Under PEG treatment reduction of cucumber dry mass was lesser than in fresh mass, whereas under salt stress decrease in dry weight of cucumber shoots was more pronounced than in fresh mass. Salt stress caused severe decrease in nitrate concentration and activity of nitrate reductase (NR). In cotyledons nitrate content declined to 17% of the control and similar reduction in NR activity was observed. In the roots, observed changes were not so drastic but there was also strong interaction between reduction in nitrate content and NR activity. Under 10% PEG both nitrate concentration and NR activity in cucumber roots were significantly higher in comparison to control plants. In cotyledons NR activity was significantly lower than in control plants, while decrease in nitrate content was not statistically significant. Phosphate concentration did not change significantly in cucumber cotyledons but increased in roots treated both NaCl (32% increase) and PEG (53% increase). Similar tendencies were observed in acid phosphatase activity. Obtained results indicated that osmotic and salt stresses evoke differential responses, particularly in growth reduction and nitrogen metabolism in cucumber seedlings.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of triazine- and urea-type herbicides on photosynthetic apparatus in cucumber leaves
    Autorzy:
    Jerzykiewicz, J
    Klobus, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/57665.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    photosynthetic apparatus
    toxicity
    chlorophyll fluorescence
    botany
    herbicide
    photosystem II
    triazine-type herbicide
    simazine
    leaf
    cucumber
    linuron
    urea-type herbicide
    Opis:
    About a half of the herbicides used at present in agnculture inhibit the light reactions in photosynthesis. Triazines and phenylureas shut down the photosynthetic process in susceptible plants by binding to specific sites within the plants photosystem II (PS II) complex. Both of them bind at the QB site on the Dl protein of PS II, and prevent the transport of electrons between the primary electron acceptor Q and the plastoquinone (PQ). Herbicides can be highly toxic to human and animal health (triazines are possible human carcinogens). Their indiscriminate use has serious environmental implications, for example pollution of soil and water. We compare two heibicides to investigate the one of lowest environmental toxicity but of high toxicity to weeds.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2007, 76, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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