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    Tytuł:
    Fusarium spp. na nadziemnych organach zamierających dębów - nowe zagrożenie?
    Fusarium spp. on the above-ground organs of dying oaks – a new threat?
    Autorzy:
    Wit, M.
    Sierota, Z.
    Oszako, T.
    Mirzwa-Mróz, E.
    Wakuliński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/989848.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewa lesne
    fitopatologia lesna
    dab
    Quercus
    zamieranie drzew
    paki
    pedy
    grzyby
    Fusarium
    wystepowanie
    zagrozenia roslin
    oak decline
    fusarium spp.
    Opis:
    Oak decline is insufficiently described problem. Declining oaks are in various age and the most commonly observed symptoms of the disease include growth inhibition and buds mortality. The dieback occurs periodically, mainly because of the impact of abiotic factors (drought, frost and the lowering of the groundwater level). In this complex phenomenon the biological factors, including numerous species of Chromista (Chromalveolata) and fungi play important role as well. The list of pathogens responsible for the dieback includes numerous species of Pythium and Phytophthora, as well as Biscogniauxia, Discula, Pleurophoma, Botryosphaeria and Diplodia. Among other organisms responsible for the oak decline are fungi belonging to Fusarium species. The aim of this study was to investigate the species composition of pathogens colonizing the dying oak buds including undeveloped or dying shoots obtained from Łomża, Rudka and Czarna Białostocka forest districts (eastern Poland). Sampling of symptomatic shoots of Quercus robur L. was performed in 2013, respecting different parts of tree crowns (top, central and bottom). Mycological material for analysis included mycelium growing on dying shoots after incubation in a chamber and tissue collected from symptomatic shoots and placed on PDA medium. For selected isolates of fungi the identification was confirmed by the PCR analysis using ITS1 and ITS4 primers. Among analyzed fungi Fusarium spp., Alternaria alternata, Cladosporium cladosporioides, Botryosphaeria quercuum and /em>Coniothyrium spp. required special attention. The Fusarium spp. group of fungi dominated with an average frequency of 32%. The molecular analysis revealed the presence of several species including Fusarium avenaceum, Cladosporium cladosporioides, Lophiostoma corticola and Nectria mauritiicola.
    Źródło:
    Sylwan; 2015, 159, 05; 403-410
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Porównanie struktury wielkości jeżyny gruczołowatej (Rubus hirtus Waldst. & Kitt. agg.) z populacji rosnących na glebach wykształconych na różnych podłożach geologicznych
    Comparison of the size structure of the blackberry [Rubus hirtus Waldst. and Kitt. agg.] from the populations growing on the soils developed on different geological substrates
    Autorzy:
    Gazda, A.
    Kochmańska-Bednarz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1009443.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    botanika lesna
    krzewy
    populacje roslin
    jezyna gruczolowata
    Rubus hirtus
    pedy
    struktura wielkosci
    struktura przestrzenna
    czynniki siedliska
    podloze geologiczne
    population structure
    size structure
    rubus hirtus
    bedrock type
    soil type
    Opis:
    The objective of the paper was to determine the size structure of the canes and individuals of Rubus hirtus populations and compare them with regard to the type of soils developed on different geological substrates (granodiorite partially covered by boulders, weathered rocks, river sediments, loams and rock rubble for podzolic soil; limestone and conglomerate interlayers for humus−rich and brown rendzinas and on Carpathian flysh for acid brown soil). The mean Rubus hirtus density on all study sites significantly differed from each other. The highest ramet density (11 individuals/m2 ) was noted on the "Dolina Łopusznej" site, while individuals from the populations on the remaining study sites occurred locally in smaller or larger clusters. The shoots of Rubus hirtus growing on podzolic soils significantly differed from those growing on acid brown soil. Long shoots (over 50 cm) on all sites constituted only a few per cent. The Rubus hirtus populations on the "Szczoty" and "Dolina Łopusznej" sites established over 50 cm high shoots, potentially capable of producing roots with the probability of 0.14. Individuals producing a single the main primocane with the probability of over 0.7 were the most frequent. Less than 10% of the individuals which in the previous year produced at least one main shoot failed to establish new main shoots at all. The number of flowering/ fruiting individuals did not exceed 20% on none of the study sites. The studied populations produced a few new ramets. The results obtained from the research permit suggesting that the underlying bedrock is the primary, while light is the secondary, factor affecting the presence of Rubus hirtus plants. This species colonises areas where the stand canopy is broken even to a slight degree.
    Źródło:
    Sylwan; 2010, 154, 05; 347-355
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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