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    Wyświetlanie 1-4 z 4
    Tytuł:
    Ocena wartości ozdobnej wybranych gatunków klonów Acer L. na podstawie obserwacji fenologicznych
    Evaluation of decorative value of selected species of maples Acer l. Based on phenological observations
    Autorzy:
    Sowelo, M.
    Antkowiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130555.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    seasonal rhythm
    climate factors
    Acer
    Opis:
    The paper presents the results of phenological observations carried out in 2017 on the following species of maples: Acer buergerianum, A. campestre, A. capillipes, A. cappadocicum, A. carpinifolium, A. circinatum, A. cissifolium, A. davidii, A. diabolicum, A. griseum, A. japonicum, A. maximowiczianum, A. miyabei, A. mono, A. palmatum, A. platanoides, A. rubrum, A. rufinerve, A. saccharum, A. shirasawanum, A. stachyophyllum, A. tataricum, A. tataricum ssp. ginnala and A. truncatum. The studies have been conducted in the Botanical Garden of Adam Mickiewicz University in Poznań based on the Shennikov research method (1928) modified by Łukasiewicz (1984). Observations have shown that the longest foliage period have species: A. japonicum, A. mono, A. platanoides and A. rubrum, while the longest duration of the autumn leaf discoloration is characterized by A. stachyophyllum, A. circinatum, A. palmatum, A. mono and female specimen of A. cissifolium. In addition all studied species, except A. buergerianum, A. capillipes, A. circinatum, A. tataricum and A. tataricum ssp. ginnala, are distinguished by the attractive autumn color of the leaves. The longest flowering period was in A. truncatum, A. stachyophyllum, A. circinatum and A. palmatum, while A. buergerianum, A. diabolicum and A. saccharum did not bloom at all. The most attractive flowers have A. davidii and A. platanoides and the most decorative fruits have A. capillipes, A. davidii, A. tataricum and A. tataricum ssp. ginnala. Studies have also shown that A. mono, A. rubrum and A. rufinerve did not fruition at all. The species of maple with the highest number of positive traits is Acer davidii, therefore it should be used as often as possible in green areas.
    Źródło:
    Steciana; 2018, 22, 3; 69-83
    1689-653X
    Pojawia się w:
    Steciana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenological observations of selected species from the genus Syringa L. (Oleaceae) in the botanical garden of the Adam Mickiewicz University in Poznań
    Autorzy:
    Sowelo, M.
    Antkowiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/790512.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    phenology
    Syringa
    Oleaceae
    botanical garden
    Adam Mickiewicz University Botanical Garden
    climatic factor
    seasonal rhythm
    Opis:
    Phenological observations at the Botanical Garden of the Adam Mickiewicz University in Poznań were conducted on Syringa komarowii, S. meyeri, S. microphylla, S. oblata, S. reticulata, S. tomentella and S. wolfii. These observations showed the longest foliation phase in the case of S. oblata and S. meyeri, while the longest flowering phase was recorded in S. reticulata, S. microphylla and S. wolfii. Additionally, the longest period of anthesis (i.e. the period from the moment when 25% flowers bloomed to the time when 75% were out of bloom) was observed in S. oblata and S. microphylla. All examined shrubs, except for S. oblata, set fruits, which dispersal was extended to the next year (except for S. komarowii). In terms of decorative value suitable for green areas the most valuable species were S. komarowii, S. reticulata, S. meyeri, S. microphylla and S. oblata, with the three latter being the most showy shrubs in terms of autumn foliage. Moreover, S. komarowii was exceptional among the analysed species due to its large, attractive leaf blades. This lilac, together with S. meyeri, was also characterised by the most decorative inflorescences. Thanks to their stronger growth in comparison to the other species, S. komarowii, S. oblata and S. reticulata are best suited for large gardens, whereas S. meyeri and S. microphylla will prove most suitable for small gardens. All the recommended shrubs show good drought resistance.
    Źródło:
    Steciana; 2017, 21, 2
    1689-653X
    Pojawia się w:
    Steciana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phenology of the wild service tree (Sorbus torminalis (L.) Crantz] in Poznań and Wielkopolski National Park
    Autorzy:
    Bednorz, L
    Urbaniak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/41389.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    phenology
    seasonal rhythm
    climatic factor
    tree
    Wielkopolski National Park
    Sorbus torminalis
    Rosaceae
    forest tree species
    Opis:
    In this paper the results of the 3-year observations (2001–2003) of seasonal rhythm of S. torminalis trees growing in Poznań in Dendrological Garden of Agricultural University and in forests of Wielkopolski National Park are presented. The observations included the course of leaf development, leaf coloration and leaf fall as well as flowering, fruit ripening and fall. Sixteen phenophases were taken into account. The differences in timing and duration of S. torminalis phenophases from year to year, between two sites and among trees within the same site are pointed out and discussed.
    Źródło:
    Dendrobiology; 2005, 53; 3-10
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Distribution of the sea squirt Ecteinascidia thurstoni Herdman, 1890 (Ascidiacea: Perophoridae) along Suez Canal and Egyptian Red Sea coasts
    Autorzy:
    Gab-Alla, A.A.-F.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/47709.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sea squirt
    sea coast
    Perophoridae
    Suez Canal
    seasonal rhythm
    Red Sea
    Ascidiacea
    distribution
    Ecteinascidia thurstoni
    Opis:
    Ecteinascidia thurstoni is a colonial sea squirt. It has a seasonal rhythm and a tropical and subtropical distribution; it is usually present during the summer months. It synthesizes a group of molecules called ecteinascidins. One of these is ET-743, a compound that has a most original anti-tumoral activity and is today considered to be one of the most promising substances effective against various solid-type tumors (currently sold under the trade name of Yondelis for the treatment of sarcomas and related tumors; it is undergoing phase II/III clinical trails for other kinds of tumors). Worldwide, Ecteinascidia species represent the only available source of this bioactive compound, which was first discovered in E. turbinata. During the present study, the ecology of E. thurstoni along the Suez Canal and Red Sea was investigated. Its populations were observed to be highly gregarious due in part to their low larval dispersal, which is very localized; larvae therefore tend to settle close to their parent colonies. It is only recorded in shallow waters (0.5–1.5 m) as an epiphyte on the pneumatophores of mangroves by the Red Sea, on the pilings of jetties, and the metal or cement banks of the Suez Canal. The morphometric characteristics (zooid length, zooid weight, colony weight) of the Suez Canal population differ significantly from those of the Red Sea. Studying the distribution of this species and locating its different populations along the Suez Canal and Red Sea could help to characterize their genetics, chemistry and bacterial communities at different isolated locations. Ultimately, this will help to define the sources of ET-743 and hence promote its biosynthesis on a commercial scale.
    Źródło:
    Oceanologia; 2008, 50, 2; 239-253
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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