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    Wyświetlanie 1-3 z 3
    Tytuł:
    Zagrożenie szkółek pojemnikowych roślin ozdobnych przez Phytophthora spp. w minionym piętnastoleciu
    The menace of hardy ornamental nursery stocks by Phytophthora spp. in the last 15 years
    Autorzy:
    Orlikowski, L.
    Szkuta, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013547.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    wystepowanie
    choroby roslin
    rosliny iglaste
    straty
    czynniki chorobotworcze
    rosliny wrzosowate
    rosliny lisciaste
    zagrozenia roslin
    fytoftoroza
    Phytophthora
    szkolki roslin ozdobnych
    nursery
    isolation
    phytophthora
    coniferous
    ericaceaous and deciduous plants
    source of inoculum
    water
    Opis:
    Eight Phytophthora species were recovered from diseased ornamental plants taken from 46 hardy nursery stocks. P. cinnamomi was mainly isolated from rotten stem bases of coniferous and ericaceous plants. P. citricola was detected from rotten stem bases but mainly from diseased leaves and stem parts. Losses caused by that group of pathogens varied from 1 to 50%.
    Źródło:
    Sylwan; 2008, 152, 09; 44-50
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Patogenne lęgniowce z rodzaju Phytophthora - nowe zagrożenie lasów w Europie
    Pathogenic oomycetes of Phytophthora genus - a new threat to forests in Europe
    Autorzy:
    Ajchler, M.
    Łobocka, M.
    Oszako, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/986789.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    fitopatologia lesna
    zagrozenia drzewostanow
    czynniki chorobotworcze
    legniowce
    Oomycetes
    Phytophthora
    fytoftoroza
    identyfikacja
    epidemiologia
    Phytophthora alni
    Phytophthora cactorum
    Phytophthora cambivora
    Phytophthora cinnamomi
    Phytophthora citrophthora
    Phytophthora quercina
    Phytophthora plurivora
    Phytophthora ramorum
    ochrona lasu
    zwalczanie chorob roslin
    oomycetes
    phytophthora
    molecular typing
    plant pathogens
    biocontrol
    Opis:
    Pathogenic oomycetes represented mainly by the species of Phytophthora genus are among the most dangerous plant pathogens. They pose a serious threat for agricultural as well as wild plants, and are involved in forest decline worldwide. Over 140 pathogenic Phytophthora species have been identified so far. The common infection symptoms include rotting of below− and above− ground parts of plants, causing weakness and slow decline of infected trees. The economic losses caused by certain Phytophthora species may rich even 100%. Globalization and border opening have facilitated the transport of plant material between countries and continents, thus increased the risk of transfer of various Phytophthora genus representatives to new geographical locations. Global warming (e.g. mild winters) have facilitated the expansion of species from southern to northern Europe. Among Polish Phytophthora isolates are species that have previously been known only in nurseries (e.g. P. cactorum), but nowadays they are also isolated from forests (e.g. oak stand in the Krotoszyn Plateau). It suggests the pathway from nurseries to stands with plant for plantings and attached soil. There are also new species, that have not been isolated so far in the world (P. polonica) or found far away from Poland (P. fragaliaefolia in Japan on strawberry). The possible natural pathways are birds and water courses. In Mazowsze and Wielkopolska regions (C and W Poland) the polyphagous P. cinnamomi was found on pedunculate oaks (Quercus robur). This species causes significant damage to red oak forest in France, but also threats Jarrah forests in the Australian ecosystem (it attacks ca. 1000 species of plants). Fortunately, in addition to time consuming and laborious classic methods of Phytophthora identification, based on morphology and physiological properties, molecular methods that are based on immunological tests and chromosomal or mito− chondrial DNA markers identification have come into common use. Despite morphological similarity to true fungi, oomycetes are more closely related to diatoms and brown algae, and have several structural features that differentiate them from fungi, including the cell wall composed of cellulose instead of chitin. That is one of the reasons that fungicides have a limited use in the fight with Phytophthora infections. Additionally, type of ecological niches that are settled by pathogenic oomycetes (root remnants in soil, watercourses) hinders the chemical combating. Biocontrol, i.e. the use of interspecies interactions between microorganisms (bacteria, fungi) to limit the growth and development of pathogens, seems to be a reasonable alternative.
    Źródło:
    Sylwan; 2017, 161, 10; 870-880
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stan zdrowotny i zróżnicowanie genetyczne buka zwyczajnego w Nadleśnictwie Siewierz na podstawie analiz chloroplastowego DNA
    Health condition and genetic differentiation level of beech in the Siewierz Forest District assessed with cpDNA markers
    Autorzy:
    Nowakowska, J.A.
    Oszako, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1013561.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    zroznicowanie genetyczne
    cpDNA zob.DNA chloroplastowy
    drzewa zdrowe
    podatnosc na choroby
    czynniki genetyczne
    lesnictwo
    Phytophthora
    drzewa chore
    Nadlesnictwo Siewierz
    czynniki chorobotworcze
    grzyby
    buk zwyczajny
    fytoftoroza
    stan zdrowotny drzew
    DNA chloroplastowy
    Fagus sylvatica
    drzewa lesne
    fagus sylvatica
    chloroplast dna markers
    heterozygosity level
    phythopthora spp.
    Opis:
    Beech decline phenomenon has been observed in Poland since the 1980s. The reasons are still unclear but the discovery of pathogens genus Phytophthora shed a new light on it. Stems as well as roots of beech trees were severely affected by P. citricola and P. cambivora. In order to find out the genetic background of infection, three loci of chloroplast microsatellite DNA were investigated in the genetic differentiation study of beeches growing in the Siewierz Forest District in Poland. Parameters of genetic diversity (h Nei) and differentiation (GST) in the chloroplast genome were estimated and compared between healthy and damaged trees. Healthy beeches were more heterozygous (h=0.243) than the damaged ones (h=0.113), and the distribution of cpDNA alleles was different between these two groups. Healthy trees were nearly 50% more genetically diversed than declining ones.
    Źródło:
    Sylwan; 2008, 152, 09; 11-20
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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