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    Wyświetlanie 1-4 z 4
    Tytuł:
    Addendum to the mycobiota of smut fungi in Poland
    Autorzy:
    Wolczanska, A.
    Cwener, A.
    Wojciak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/67586.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Opis:
    The paper presents new records of three rare species of smut fungi in Poland. Anthracoidea buxbaumii was collected in new localities, A. caricis collected on Carex montana is a new fungus/host combination in Poland, and Urocystis ranunculiauricomi was found in the country after almost 50 years.
    Źródło:
    Acta Mycologica; 2016, 51, 1
    0001-625X
    2353-074X
    Pojawia się w:
    Acta Mycologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The distribution and habitat requirements of the genus Orobanche L. (Orobanchaceae) in SE Poland
    Autorzy:
    Piwowarczyk, R.
    Chmielewski, P.
    Cwener, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/58631.pdf
    Data publikacji:
    2011
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Lublin Upland
    Orobanchaceae
    Orobanche
    Polska
    distribution
    habitat preference
    habitat requirement
    host
    Wolyn-Podole Upland
    Orobanche alba
    Orobanche alsatica
    Orobanche arenaria
    Orobanche caryophyllacea
    Orobanche elatior
    Orobanche lutea
    Orobanche pallidiflora
    Orobanche picridis
    Opis:
    The distribution of the genus Orobanche in SE Poland is presented. The study area stretches between the Vistula and the Bug rivers, and comprises the Polish areas of the Lublin-Lwów Upland, theWołyń Upland and the southern part of Polesie. Eight species of the genus Orobanche: O. alba, O. alsatica, O. arenaria, O. caryophyllacea, O. elatior, O. lutea, O. pallidiflora, O. picridis, were collected during floristic investigations conducted between 1999 and 2010. The hosts, abundance and habitat preferences at the localities are given and a supplemented map of the distribution in SE Poland is included.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2011, 80, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pollination and floral biology of Adonis vernalis L. (Ranunculaceae) - a case study of threatened species
    Autorzy:
    Denisow, B.
    Wrzesien, M.
    Cwener, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/58993.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    pollination
    floral biology
    pollen viability
    seed
    Adonis vernalis
    Ranunculaceae
    threatened species
    Opis:
    Although the knowledge of pollination systems of rare and threatened species is one of the principles for development of optimal conservation and management strategies, the data about their pollination requirements are scarce or incomplete. Different problems are listed (xerothermic habitat disappearance, overgrowing of patches, plant biology i.e., slow plant growth, problems with seed germination) among the possible causes of Adonis vernalis being threatened, but until now no consideration was given to the flowering biology and pollination. The observations of flowering biology of A. vernalis (Ranunculaceae), a clonal species, were conducted in an out-ofcompact- range population, in the Lublin Upland, Poland (51°18'55" N, 22°38'21" E), in 2011–2013. The reproductive potential of A. vernalis is related to the population age structure, pollination syndrome, and breeding system. The flowers exhibit incomplete protogyny. The dichogamy function is supported by different (biological, morphological) mechanisms. Stigma receptivity occurred about one day before anthers started shedding self-pollen, and pollen viability was increasing gradually during the flower life-span (66.3% in distal anthers vs. 77.3% in proximal). The decrease in pollen production and in pollen viability coincided with the lowest degree of seed set, irrespective of the pollination treatment. Pollen vectors are necessary for efficient pollination, as the proportion of pistils setting fruits after open pollination (41–82.1%) was significantly higher compared to spontaneous self-pollination (only 5.5–12.3%). The pollination requirements together with pollen/ovule ratio (P/O = 501) indicate a facultative xenogamous breeding system in A. vernalis. Therefore, in the conditions of the global lack of pollinators, improper pollination may weaken the population by leading to a decrease in the proportion of recombinants, and in addition to other factors, may accelerate extinction of small A. vernalis populations.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 1
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is Viola uliginosa critically endangered in Poland? - new data on the distribution of the species
    Autorzy:
    Krawczyk, R
    Nobis, A.
    Nobis, M.
    Cwener, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/59152.pdf
    Data publikacji:
    2008
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Viola uliginosa
    endangered plant
    Polska
    new data
    species distribution
    population size
    threatened species
    Sandomierz Basin
    Opis:
    Viola uliginosa Besser is a European species mainly known from the Baltic Region. It is endangered in a significant part of its range. Research carried out in the southeastern part of Poland led to the discovery of numerous sites of Viola uliginosa. Fourteen new localities of this species were found in the area of the Kotlina Sandomierska basin. This paper presents information concerning the localization of all new sites, the abundance of Viola uliginosa at the sites and habitats this species occupies. A discussion regarding the endangered status of this species in the Polish flora is given.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2008, 77, 4; 345-349
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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