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    Tytuł:
    Owoc wawrzynka (Daphne L., Thymelaeaceae) - pestkowiec czy jagoda?
    The daphne fruit (Daphne L., Thymelaeaceae) - is it a drupe or a berry?
    Autorzy:
    Zielinski, J.
    Guzicka, M.
    Gawlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/888487.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Dendrologiczne
    Tematy:
    wawrzynek
    Daphne
    wawrzynkowate
    Thymelaeaceae
    owoce
    budowa morfologiczna
    budowa anatomiczna
    owoce jagodowe
    owoce pestkowe
    Źródło:
    Rocznik Polskiego Towarzystwa Dendrologicznego; 2017, 65
    2080-4164
    2300-8326
    Pojawia się w:
    Rocznik Polskiego Towarzystwa Dendrologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Znaczenie owłosienia pędów i liści w odróżnianiu Populus × canescens od jej gatunków rodzicielskich P. alba i P. tremula
    Significance of stem and leaf indumentum in distinguishing Populus × canescens from its parent species P. alba and P. tremula
    Autorzy:
    Zielinski, J.
    Tomaszewski, D.
    Guzicka, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/888475.pdf
    Data publikacji:
    2012
    Wydawca:
    Polskie Towarzystwo Dendrologiczne
    Tematy:
    dendrologia
    drzewa
    topola
    Populus
    mieszance miedzygatunkowe
    topola szara
    Populus canescens
    formy rodzicielskie
    topola biala
    topola osika
    Populus alba
    Populus tremula
    pedy odroslowe
    krotkopedy
    dlugopedy
    liscie
    liscie z kutnerem
    kutner
    wloski roslinne
    cechy diagnostyczne
    identyfikacja gatunkowa
    obrazy mikroskopowe
    mikroskopia skaningowa
    mikroskopia swietlna
    Opis:
    The indumentum of P. alba, P. tremula and their hybrid (P. ×canescens) is discussed in detail and illustrated by scanning electron microscope and light microscope micrographs. Special attention is given to the hairiness of stems and leaves and to the diagnostic value of hairiness in distinguishing the grey poplar from its parent species. Presence or lack of hairs on leaves and stems, their density and their persistence are very useful features in distinguishing the taxa. Short shoot leaves of P. alba are usually described as initially densely white tomentose, but become glabrous or glabrescent. From our observations, it appears that the abaxial leaf surface of the white poplar remains hairy during the whole life span of the leaf. Hairiness does not disappear, but changes with time; arachnoid hairs become squeezed and pressed together until they finally form a very thin shiny layer on the leaf surface. In late summer, the indumentum becomes thinner and leaf blades seem to be glabrous, although hairs are still visible when using a strong magnifying glass. This feature allows easy distinction between P. alba and the similar P. ×canescens, the leaves of which are loosely arachnoid-tomentose when young and become fully glabrous or subglabrous when mature. Due to the presence of arachnoid hairs, the grey poplar can usually also be distinguished from its second parent, P. tremula. However, because of the introgression between the poplars, all possible features should be taken into account in diagnosis, especially the shape and indumentum of terminal adult leaves of long shoots and/or stronger suckers. In P. tremula, such leaves are usually broadly ovate, cordate at the base, irregularly serrate, glabrous or hairy, but never with long arachnoid hairs. In P. alba, the upper leaves of long shoots and suckers are deeply lobed, serrate and densely white arachnoid on the abaxial side, while in P. ×canescens they are serrate or shallowly lobed, rather loosely covered with arachnoid hairs and greenish-grey.
    Źródło:
    Rocznik Polskiego Towarzystwa Dendrologicznego; 2012, 60
    2080-4164
    2300-8326
    Pojawia się w:
    Rocznik Polskiego Towarzystwa Dendrologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anatomical study on the developing pericarp of selected Rosa species (Rosaceae)
    Autorzy:
    Guzicka, M.
    Zielinski, J.
    Tomaszewski, D.
    Gawlak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/41015.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    plant anatomy
    developing pericarp
    pericarp
    structure
    wild plant
    rose
    Rosa
    Rosaceae
    SEM analysis
    CLSM zob.confocal laser scanning microscopy
    confocal laser scanning microscopy
    lignification
    achene
    Opis:
    Results of anatomical studies on the developing pericarp of selected wild roses are presented. Using SEM and CLSM, the changes in the pericarp structure of 5 species have been observed during its formation, from the flowering stage to fully ripe achenes. In the morphological development of the pericarp of Rosa species two main phases can be distinguished: the phase of intensive growth of the pericarp during which the fruit achieves its final shape and volume, and the subsequent phase of pericarp ripening when no significant morphological changes in the pericarp occur. Similarly, in the process of the anatomical development of the pericarp two phases are noticeable, however, during both stages, great internal changes proceed in the fruit. The first phase consists of intensive cell divisions and enlargement, gradual thickening of cell walls and formation of all pericarp layers. Due to these changes, the pericarp achieves its final anatomical structure. The second phase, involving the pericarp ripening, is manifested in the modification of cell walls, mainly by their quick thickening, but first of all by their lignification. The lignification of pericarp cell walls begins in the inner endocarp; it proceeds in the outer endocarp, later in mesocarp and finishes in the hypodermal cells of the exocarp. The epidermal cells remain alive the longest and their walls do not (or hardly) become lignified. The death of all cells finishes the pericarp ripening.
    Źródło:
    Dendrobiology; 2012, 68
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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