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Wyszukujesz frazę "spruce seedlings" wg kryterium: Temat

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Mikoryzy siewek świerka (Picea abies (L.) H. Karst.) hodowanych na podłożach trocinowo - torfowych o różnym okresie użytkowania
    Mycorrhizae of spruce (Picea abies (L.) Karst.) seedlings growing on sawdust-peat substrates of different periods of utilization
    Autorzy:
    Stepniewska, H.
    Drabek, E.
    Fedynkiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1023349.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    szkolkarstwo lesne
    mikoryza
    szkolki lesne
    Picea abies
    lesnictwo
    siewki
    podloza uprawowe
    podloza trocinowo-torfowe
    swierk pospolity
    drzewa lesne
    mycorrhizae
    spruce seedlings
    sawdust−peat substrata
    Opis:
    The frequency of occurrence and diversification of mycorrhizae in 1− and 2−year−old spruce seedlings were investigated. It was found that seedlings growing on substrates used earlier were better mycorrhized than seedlings growing on a fresh substrate. In the case of 2−year−old seedlings, a favourable effect of the substrate used earlier was weaker, and also other factors decided on the level of their mycorrhization.
    Źródło:
    Sylwan; 2004, 148, 10; 13-22
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exogenous seed treatment with proline and its consequences to Norway spruce (Picea abies (L.) H. Karst) seedling establishment
    Autorzy:
    Kijowska-Oberc, J.
    Wawrzyniak, M.K.
    Staszak, A.M.
    Ratajczak, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130182.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    proline
    seed treatment
    Norway spruce
    seedlings development
    tree seeds
    oxidative stress
    Opis:
    Accumulation of proline is a defense mechanism against external stress conditions, preventing damage to the structure and function of cells and improving plant development processes, such as germination. The purpose of this study was to investigate proline treatment as a means of improving the germination and development of Norway spruce seedlings. The effect of exogenous proline has been studied in three stages of initial plant development. The collected seeds were soaked in water or 8 mM proline solution and placed on the germinators. The germination capacity and the mean germination time were determined. Seedlings with radicles >10 mm were transferred to the sand-peat substrate at a constant temperature of 20 °C. Seedlings at 3 subsequent developmental stages (S1 – germinated seeds with radicles > 3 mm; S2 – seedlings with radicles >10 mm; S3 – established seedlings grown for 90 days) were examined for the oxygen consumption rate, total antioxidant capacity, hydrogen peroxide level, malondialdehyde level and intracellular proline content. Proline treatment was conducive to lowering the levels of hydrogen peroxide and malondialdehyde at stage S1. At the subsequent stages of development, the levels of hydrogen peroxide and malondialdehyde increased, and at the S3 stage, there was also a marked increase in total antioxidant capacity. At stage S3, the seedlings of the proline treatment were characterized by a lower total mass, and the response to exogenous proline was stronger in the root tissues than in the leaves. The oxygen consumption rate was higher for the proline treatment at all stages of development. Seedlings at the analyzed stages of establishment differed in response to proline treatment. Exogenous proline had some beneficial effects during the first phase of germination by reducing the level of hydrogen peroxide and improving the condition of lipid membranes. In the subsequent stages of seedling development, in response to the same concentration of proline solution, undesirable effects, such as an increase in hydrogen peroxide levels and damage to cytoplasmic membranes, were observed. Optimal concentrations of exogenous proline should be determined prior to commercial use of proline treatment to improve plant stress tolerance.
    Źródło:
    Dendrobiology; 2022, 87; 149-162
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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