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    Wyświetlanie 1-5 z 5
    Tytuł:
    Filtry biologiczne jako metoda ochrony siewek przed patogenami w szkółkach leśnych
    Slow Sand Filter as a method of protection forest plants against phytopathogens in forest nurseries
    Autorzy:
    Kubiak, K.
    Oszako, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/973901.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    biofilmy
    bakterie
    oznaczanie
    oczyszczanie wody
    filtrowanie
    filtry piaskowe
    leśnictwo szkółki leśne
    woda użytkowa
    forest nursery
    biofilm
    Slowa Sand Filter SSF)
    Phytophthora
    DNA isolation
    DGGE
    PCR
    Opis:
    Slow sand filtration (SSF) is a low−cost method of water disinfestation that can be used as an alternative method of water irrigation treatment in nursery to control water−borne phytopathogens. Slow sand filtration relies on physical, chemical and biological activity in controlling plant pathogens. In a SSF, the filter bed is constructed of a medium−sand with the area which can be colonised by microorganisms – biofilm. This sand media also presents a physical barrier to fungal, bacterial and oomycetes plant pathogens. In the forest nursery Kiejsze an experimental slow sand filter was constructed to study the structure of a bacterial community suppressive to plant pathogens. The total bacterial community of an experimental SSF was analyzed by denaturing gradient gel electrophoresis (DGGE) of partial 16S rRNA gene PCR products. Sequence analysis of DGGE bands from the SSF column indicated that a range of bacteria were present, among them similar to groups such as alfa−Proteobacteria, delta−Proteobacteria, beta−Proteobacteria, Planctomycetes, Actinobacteria, Firmicutes, Bacilli and an uncharacterized environmental clone. This study describes the characterization of the microbial community of SSFs used for the treatment of irrigation water in the forest nursery. Using of natural SSF filters and manipulation of microorganisms in the biofilm may be a more reproducible control method of plant pathogens in the future.
    Źródło:
    Sylwan; 2011, 155, 04; 228-235
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Detekcja fitopatogenów z rodzaju Phytophthora w glebach leśnych za pomocą analiz DNA
    Detection of Phytophthora in forest soils using DNA analysis
    Autorzy:
    Kubiak, K.A.
    Oszako, T.
    Jabłoński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/996874.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    gleby lesne
    czynniki chorobotworcze
    mikroorganizmy glebowe
    Phytophthora
    identyfikacja
    analiza DNA
    metoda nested-PCR
    phytophthora
    identyfication
    dna isolation
    forest soil
    pcr
    Opis:
    Pathogenic oomycetes from the genus Phytophthora attack the base trunks and root systems of trees causing their illness and dying. Under favorable conditions, they may cause damage to even 90% of fine roots. For this reason, they are a particular threat to seedlings in nurseries of forest trees and ornamental plants. Early detection and identification of Phytophthora species is a key issue in forest protection. The aim of this study was to compare the two methods of identification of pathogenic Phytophthora in soil samples collected around 50 selected oaks in Krotoszyn and Karczma Borowa forest districts. Each of the soil samples were analyzed in parallel: 1) direct isolation of genomic DNA from soil and 2) isolation of genomic DNA from soil, preceded by its three day pre−incubation in a selective medium for Phytophthora. Species identification was performed by PCR amplification with primers specific for the species of Phytophthora. The results indicate that the use of pre−incubation phase of soil in a medium−PARP PeaBroth before isolation of DNA, increases the sensitivity of detection of these phytopathogens using PCR. With pre−incubation, the method revealed 54% of positive findings, while simultaneously conducted the same analysis of soil samples by using only direct DNA isolation from soil and PCR amplification provided only 30% of positive findings.
    Źródło:
    Sylwan; 2012, 156, 06; 437-443
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oszacowanie różnorodności gatunkowej drzewostanów z wykorzystaniem ich reflektancji
    Estimation of tree species diversity of forest stands based on their spectral reflectance
    Autorzy:
    Kotlarz, J.
    Kubiak, K.
    Kacprzak, M.
    Czapski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/989447.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    fotogrametria
    drzewostany
    roznorodnosc gatunkowa
    drzewa lesne
    reflektancja
    zdjecia lotnicze
    zdjecia wielospektralne
    analiza skladowych glownych
    remote sensing
    pca
    aerial environmental monitoring
    quercus robur
    canopy
    Opis:
    Evaluation of the forest landscape diversity was investigated based on the multispectral aerial images using iterative Principal Component Analysis (PCA) methodology. In 2014, we carried out several photogrammetric flights over the experimental plots establish in the Krotoszyn Plateau (central Poland) documenting the vegetation cycle of forest stands dominated by oaks. Aerial photos of the spatial resolution about 25 cm of forest area in Karczma Borowa Forest District in the range of visible light (460−650 nm) and near infrared (700−930 nm) were collected by multispectral Quercus 6 platform placed on the aircraft. The aim of the study was to evaluate the diversity of forest vegetation cover using remote sensing data based on spectral signatures of plants without complete classification of fractional vegetation cover and species identification in the field. Recursive PCA on data collection from the multispectral images helped to determine with the semi−automatic mode the number of land cover classes, including the classes of vegetation. Based on the radiometric data, the separation of inorganic matter from vegetation and diversity indicators of forest stands on the image area were evaluated. With the PCA method, along the most volatile vectors, the first division into land cover classes of vegetation was conducted. As a result of the first iteration of PCA, three classes of vegetation: deciduous trees, conifers and forest undergrowth was determined. In the second iteration, classes of forest vegetation were separated and interpreted as the area dominated by a single species of tree or shrub. The second iteration divided the deciduous plant image area in plots dominated by English oak stands with an admixture of birch and red oak. Based on the number of pixels in classes representing individual plant species, Shannon−Wiener (H) and Simpson (D) diversity indices were determined. By described methodology, it was found that the differences between the H and D indices for the imagery area after the first and second PCA iteration were small. The relevance of performing successive iterations of PCA analysis, and thus the full identification of species, in the context of diversity calculation should be the subject of further study.
    Źródło:
    Sylwan; 2016, 160, 12; 1036-1045
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rozkład drewna sosny pod wpływem działania grzybów Merulius lacrymans Wulf., Poria vaporaria/Pers/Fr. i Gloeophyllum sepiarium/Wulf/Karsten
    Decay of pine wood under the influence of the fungi Merulius lacrymans Wulf., Poria vaporaria (Pers.) Fr. and Gloeophyllum sepiarium (Wulf.) Karsten
    Autorzy:
    Rogalinski, K.
    Kubiak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/822923.pdf
    Data publikacji:
    1967
    Wydawca:
    Polskie Towarzystwo Leśne
    Źródło:
    Sylwan; 1967, 111, 12
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zmiany własności fizycznych i mechanicznych drewna topoli holenderskiej Populus marilandica Bosc. pod wpływem działania grzyba Poria vaporaria Pers./Fr.
    Variation in physical and mechanical properties of poplar wood (Populus marilandica Bosc.) under the influence of Poria vaporaria (Pers./Fr.) fungus
    Autorzy:
    Kubiak, M.
    Rogalinski, K.
    Michalak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/820619.pdf
    Data publikacji:
    1962
    Wydawca:
    Polskie Towarzystwo Leśne
    Źródło:
    Sylwan; 1962, 106, 03
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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