Ograniczanie wyników

Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 35

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  cechy anatomiczne
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
The nectaries anatomical features of nine species of Pomoideae subfamily Aronia melanocarpa Ell., Cotoneaster horizontalis Decne, C. praecox Vilm.-Andr., C. lucida Schlecht., Crataegus monogyna Jacq., C. coccinea L., C. crus-galli L., Sorbus aucuparia L., Sorbus intermedia Pers. were compared. The flower longitudinal sections by means of vibratome and semithin slides by use of ultramicrotome were made. The thickness of nectary epidermis, glandular layer and the structure of subglandular layer as well as the run of vascular bundles were studied. It was stated that the height of epidermis cells and the thickness of their wall were approximate in the most investigated taxons. Stomata occurred in the nectaries of all species. They were located on a level with the epidermis cells in Aronia and Sorbus genera, in small hollows in Cotoneaster and considerably below the level of epidermis cells in Crataegus. The thickness of glandular layer was approximate for each genera. Sorbus intermedia and the species of Crataegus genus wer distinguishable by the thickest nectaries. The concentration of brachysclereids occurred in subglandular tissue of Crataegus crus-galli and of Sorbus both species. Vascular bundles, stocking the nectary, mostly consisted of phloem and xylem, but in Aronia, Cotoneaster praecox and C. lucida only phloem was noticed. The dependence between thickness of glandular layer, studied anatomical features and the volume of secreted nectar is discussed.
W artykule omówiono cechy anatomiczne i fizykochemiczne ziarna kukurydzy, odmiany oraz sposób suszenia tego surowca przeznaczonego do produkcji grysu kukurydzianego. Podano przyczyny stosowania grysu kukurydzianego jako substytutu słodu.
Programme of Conservation and Restitution of the Common Yew in Poland was initiated in 2006. The research determined variability of the species Taxus baccata L. clones originated from different sites, included in the Archive of Clones of Valuable Species in the Forest Inspectorates of Syców. Taxus baccata L. clones were obtained from parent trees growing in the Forest Inspectorate of Lubsko, Wdecki River Landscape Park, Forest Division of Żółwiniec, Forest Inspectorate of Woziwoda, Wierzchlas Reserve and Forest Inspectorate of Czersk. A foil tunnel experiment was established in the Prof. Stefan Białobok Forest Arboretum situated within the Forest Inspectorate of Syców. Each site was represented by the group of 100 clones. Eight months after the date of rooting process commencement the degree of rooting (%), number of lateral branches and length of spring shoots (cm) were estimated. The following morphological and anatomical observations and measurements were carried out: the number of stomatal apparatuses per 25000 pm² and their length (μm), thickness and width of needles (μm), size of needles of the layer of spongy and palisade parenchyma as well as the vascular bundles (μm). The results obtained were analyzed statistically. Cluster analysis was used to distinguish the groups among studied genotypes and to determine the distances between particular groups. Statistically significant variability of Taxus baccata plants originating from different sites was found for all characters studied. The seedlings from the first site - the Lubsko Forest Inspectorate - showed the highest rooting degree as well as the most advantageous number and length of spring shoots. The anatomical features of needles analyzed turned out to be helpful in determination of the variability in studied material relative to the origin.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.