Temat: pollen morphology - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Pollen morphology of Amygdalus L. [Rosaceae] in Iran
Autorzy:: Vafadar, M
Attar, F.
Maroofi, H.
Mirtadzadini, M.
Tematy:: pollen morphology
Amygdalus
Rosaceae
taxonomy
Iran; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/57376.pdf Link otwiera się w nowym oknie
Opis:: Pollen grain of 16 species and three hybrids of the genus Amygdalus L., representing two subgenera and two sections distributed in Iran were examined by light and scanning electron microscopy. All pollen grains are tricolporate. The shape of grains varies from subprolate through prolate. Regarding outline, in polar view, pollen grains are triangular-circular and in equatorial view, elliptic. Regarding sculpturing of exine, the frequent type like many members of family Rosaceae is striate with or without perforations that can be subdivided into three subtypes: type I (A-B), type II (A-B) and type V. In three species, A. trichamygdalus, A. spinosissima and A. orientalis, exine sculpture type is completely different. In the first species is rugulate, in the second species is reticulate and in A. orientalis, it is gemmate-perforate. Ornamentation of ridges (muri) in the striate sculpture is parallel to ectocolpus. Number of perforations in tectum, diameter of them, striae intervals and the thickness of ridges varies among studied taxa. The striae have different depth and slope. Results showed that among pollen grain characters, shape is useful character solely for separating of taxonomic ranks in Iranian Amygdalus specially in subgeneric or section level.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Pollen morphology of Quercus (subgenus Quercus, section Quercus) in Iran and its systematic implication
Autorzy:: Panahi, P.
Pourmajidian, M.R.
Pourhashemi, M.
Tematy:: pollen morphology
Quercus
Iran
systematics
taxonomy
pollen grain
pollen type; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/57449.pdf Link otwiera się w nowym oknie
Opis:: For the first time, pollen morphology of 9 (4 spp. and 5 subspp.) taxa representing lobed leaved oaks of Iran in the family of Fagaceae has been examined and illustrated using light microscopy and scanning electron microscopy of acetolysed material. Detailed pollen morphological characteristics are given for Quercus section. The pollen grains are single, isopolar, radially symmetrical, tricolpate, tricolporoidate or tricolporate. Pollens were studied to show all possible characteristics like shape, size, apertures, wall thickness, etc., with special reference to the specific features of each pollen type such as structural, sculptural and suprasculptural patterns. There is considerable variation in pollen morphology between taxa so that, three types of pollen shape, five types of structural pattern, two types of sculptural pattern, five types of suprasculptural pattern and three types of perfora distribution are defined. Furthermore, the relationship between pollen morphology and taxonomy is discussed. Overall, pollen characters are shown to be a useful and informative tool for assessing taxonomic position within Quercus section in Iran.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Pollen morphology of genus Rubus L. Part III. Studies on the Malesian species of subgenera Chamaebatus L. and Idaeobatus L.
Autorzy:: Tomlik-Wyremblewska, A
Van Der Ham, R.W.J.M.
Kosinski, P.
Tematy:: Rubus
pollen morphology
Malesian species
Idaeobatus
Chamaebatus; Pokaż więcej
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/56663.pdf Link otwiera się w nowym oknie
Opis:: The results of pollen morphology of Malesian Rubus species are presented. The pollen samples represented 2 subgenera; 2 species of subgenus Chamaebatus (R. calycinus, R. pectinellus) and 13 species of subgenus Idaeobatus (R. acuminatissimus, R. alpestris, R. archboldianus, R. chrysogaeus, R. copelandii, R. ellipticus, R. ferdinandi-muelleri, R. fraxinifolius, R. niveus, R. lorentzianus, R. macgregorii, R. montis-wilhelmi, R. papuanus). The examination of these species has been made by SEM for the first time and also by LM. Detailed descriptions of the pollen grains are given. As in the majority of Rubus species, pollen grains of both subgenera are isopolar and trizonocolporate. The pollen grains were small for some species of the subgenus Idaeobatus only, medium for both subgenera: Chamaebatus and Idaeobatus. The thickest exine was observed among the species of subgenus Chamaebatus and in R. macgregorii of subgenus Idaeobatus. The ornamentation of the studied pollen has shown a great variability. Except for the typical striate ornamentation of the genus, rugulate (R. archboldianus), striatescabrate (R. lorentzianus) and striate-rugulate (R. macgregorii) ornamentation has been observed. New Guinean morphologically similar pinnate Rubus ferdinandi-muelleri, R. montis-wilhelmi, R. papuanus, have pollen with specific type of striate pattern, which is characterised by relatively high muri with variable thickness and lumina filled with granules. Some of their muri resemble baculae typical only for R. chamaemorus. The pollen morphology analysis leads to the conclusion that Rubus montis-wilhelmi and R. papuanus of subgenus Idaeobatus are the closest related species and morphologically very close to R. ferdinandi-muelleri. Since Focke placed the latter species in section Pungentes of the subgenus Idaeobatus, and the two first species were unknown to him - the authors suggest to include them into this section. Despite of the different origin and various types of leaves R. chrysogaeus, R. acuminatissimus and R. niveus have shown similarities in pollen morphology and are grouped together. On the basis of the same criteria, R. copelandii, R. ellipticus and R. fraxinifolius could have been grouped together, as well as R. alpestris and R. macgregorii. Trifoliolate R. archboldianus and R. lorentzianus have not shown similarities of pollen ornamentation to each other and to the previous mentioned species.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Taxonomy and distribution of Allium ursinum (Liliaceae) in Poland and adjacent countries
Autorzy:: Skubała, Kaja
Opis:: The paper presents distribution data on Allium ursinum L. in Poland, with additional records from the other European countries. The study comprised 367 herbarium specimens, drawn from most of Polish herbaria and individuals obtained during field investigations. Two subspecies have been recorded: A. ursinum L. subsp. ursinum and A. ursinum subsp. ucrainicum Kleop. et Oxner. The study also documents the presence of intermediate populations at the border of the distribution ranges for both subspecies. In addition, the paper presents the pedicel structure and pollen grains ultrasculpture of each subspecies under a scanning electron microscope (SEM). Finally, questions in respect of the distribution data and habitat preferences are discussed.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 5.

Tytuł:: Does climate affect pollen morphology? : optimal size and shape of pollen grains under various desiccation intensity
Autorzy:: Ejsmond, Anna
Wrońska-Pilarek, Dorota
Kozłowski, Jan
Dragosz-Kluska, Dominika
Karpińska-Kołaczek, Monika
Kołaczek, Piotr
Ejsmond, Maciej
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Pollen morphology in the tribe Nigelleae (Ranunculaceae): a worldwide palynological investigation into the species
Autorzy:: Isik, S.
Donmez, E.O.
Aydin, Z.U.
Donmez, A.A.
Tematy:: Garidella
Komaroffia
multivariate analysis
Nigella
Ranunculaceae
pollen morphology; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/2117898.pdf Link otwiera się w nowym oknie
Opis:: The pollen morphology of many collections of taxa of the tribe Nigelleae from the family Ranunculaceae which occur worldwide is presented in this study. A total of 88 specimens from 21 taxa, some of which were recently proposed, belonging to the genera Komaroffia, Garidella, and Nigella of Nigelleae were examined using light microscopy (LM) and scanning electron microscopy (SEM). In the tribe, the pollen type is mostly trizonocolpate, but in many taxa and specimens, both trizonocolpate and non-trizonocolpate types occur together. The pollen grains are small to medium (25–53.75 μm × 20–55 μm) in size and oblate to prolate in shape. The exine pattern at the mesocolpium in all the taxa investigated is similar: micro-echinate in LM and micro-echinate-punctate in SEM. The colpus membrane in Komaroffia and Nigella is micro-echinate in both LM and SEM. In Garidella, it is micro-echinate in LM but echinate (spinulose) in SEM. In this study, multivariate analyses, principal component analysis (PCA), and unweighted pair group method with arithmetic mean (UPGMA), were used to evaluate relationships between the genera and species within the tribe with respect to pollen morphology. PCA results show three main groups in the tribe: Garidella, Komaroffia, and Nigella. Moreover, the UPGMA tree also chiefly supports generic segregation into the smaller genera. An overall synthesis of the pollen characteristics of the three genera is provided and discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Microsporangia and pollen morphology of Ginkgo biloba cultivars
Autorzy:: Korszun, S.
Klimko, M.
Tematy:: microsporangium
pollen grain
pollen morphology
Ginkgo biloba
plant cultivar
scanning electron microscope; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Powiązania:: https://bibliotekanauki.pl/articles/41651.pdf Link otwiera się w nowym oknie
Opis:: Morphological features of microsporangia and pollen grains from cultivated plants of Ginkgo biloba were examined using light and scanning microscopy. The sporophylls bear mainly two pendulous microsporangia; three or four were rarely found. The sporangia dehisce along a longitudinal slit and are characterized by reticulate primary sculpture. The basic shape of pollen grains is prolate and perprolate (rarely spheroidal) and they possess a single aperture, which extends from one extremity of the pollen grain to the other. The surface is rugulate, folded, psilate, psilate-slightly striate, regularly striate and fossulate. Perforations are present. Different types of sculpture were found on the same specimens. Our results suggest that although some cultivated plants are morphologically well characterized by habit and shape of leaves, they cannot be separated based on microsporangia and pollen grain morphology. In our investigations the microsporangia and pollen grain micromorphology of eight cultivars of Ginkgo were studied for the first time, providing some important new data.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: SEM studies on sporangia and pollen morphology of Gingko biloba cultivars
Autorzy:: Klimko, M.
Bykowska, J.
Korszun, S.
Tematy:: SEM analysis
sporangia
pollen morphology
pollen grain
Ginkgo biloba
male
cone
plant cultivar; Pokaż więcej
Wydawca:: Uniwersytet Przyrodniczy w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/790563.pdf Link otwiera się w nowym oknie
Opis:: The present study was conducted to illustrate the micromorphology of mature sporangia and pollen grains of four Ginkgo biloba cultivars: ‘Horizontalis’, ‘Lasiocarpa’, ‘Pragensis’ and ‘Tubifolia’ and is a continuation of earlier investigations on this subject. The sporophylls bear typically two pendulous sporangia, whereas three were found in one cultivar. The sporangia varied in shape from oval, elliptical elongate to boat-shaped and dehisced along a longitudinal slit. The sporangial walls are multilayered. The sculpture of the sporangium is rugose covered with wax crystals (tubules) and the endothecium shows clearly visible fibrous thickening on the wall. The pollen grains are monosulcate, the non-apertural surface is irregularly ridged (striate) or rugulate, with perforations and the germinal aperture (furrow) is covered with verrucae. The current study did not differentiate significantly four cultivars based on sporangia and pollen morphology. The micromorphological traits may be useful for identification and classification of fragments of fossil sporangia and pollen grains.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Pollen morphology of Pinus uliginosa Neum. and Pinus uncinata Ramond ex DC in an experimental culture
Autorzy:: Klimko, M.
Bykowska, J.
Tematy:: pollen morphology
pollen grain
Pinus uliginosa
Pinus uncinata
experimental culture
scanning electron microscopy; Pokaż więcej
Wydawca:: Uniwersytet Przyrodniczy w Poznaniu
Powiązania:: https://bibliotekanauki.pl/articles/790611.pdf Link otwiera się w nowym oknie
Opis:: Pollen grains of Pinus uliginosa and P. uncinata were examined by light and scanning electron microscopy. The pollen grains were bisaccate and monosulcate. The corpus-saccus attachment was distinct. The pollen corpus exine sculpture was verrucate-rugulate and deeply sculptured. The surface of the tectum was with or without small grana and it was perforate. The saccus sexine ornamentation was reticulate and irregularly perforate. The tectum surface characters in the proximal and distal view of the corpus and saccus were less variable and they did not provide good criteria to identify the species under study. Among the P. uncinata from the Forest Arboretum there were differences observed in the size, shape and height of elevation and sculpture on the corpus between pollen grains of the same specimen. This study of the pollen grain morphology of the corpus and saccus provided some important new data.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Pollen morphology of selected European species of the genus Allium L. (Alliaceae)
Morfologia ziarn pyłku wybranych europejskich gatunków z rodzaju Allium L. (Alliaceae)
Autorzy:: Wrońska-Pilarek, D.
Halbritter, H.
Krzymińska, A.
Bednorz, L.
Bocianowski, J.
Tematy:: pollen morphology
European species
Allium
Alliaceae
pollen variability
palynology
micromorphology
taxonomy
SEM analysis; Pokaż więcej
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Powiązania:: https://bibliotekanauki.pl/articles/11543283.pdf Link otwiera się w nowym oknie
Opis:: The pollen morphology of eight species from three subgenera and five sections of the genus Allium L. was studied by LM and SEM (i.e.: A. angulosum, A. carinatum, A. senescens subsp. montanum, A. oleraceum, A. scorodoprasum, A. ursinum, A. victorialis and A. vineale). The material came from natural sites of these species located in Poland, Czech Republic, Austria and Italy. For measurements a sample consisted of 30 pollen grains. In total, 240 pollen grains were analysed. They were analysed in respect to six quantitative features (i.e.: length of long axis – LA, length of short axis – SA, thickness of exine along long axis – Ex, SA/LA and Ex/LA ratios and length of sulcus) and the following qualitative ones: pollen outline and shape, exine ornamentation. Taxonomic value of these pollen features is considerable, especially on the sections level. On the basis of these features, it is impossible to distinguish individual Allium species but only their groups. The examined features were characterized by moderate (LA, SA and SA/LA) or high variability (Ex, Ex/LA). Among studied species the lowest variability was found in A. victorialis and the highest in A. vineale and A. oleraceum.
W pracy przedstawiono wyniki badań nad morfologią ziarn pyłku ośmiu gatunków z rodzaju Allium L. (A. angulosum, A. carinatum, A. senescens subsp. montanum, A. oleraceum, A. scorodoprasum, A. ursinum, A. victorialis i A. vineale) reprezentujących trzy podrodzaje i pięć sekcji, oparte na obserwacjach przy użyciu mikroskopu świetlnego (LM) i skaningowego (SEM). Materiał badawczy pochodził ze stanowisk naturalnych wymienionych gatunków zlokalizowanych w Polsce, Czechach, Austrii i we Włoszech. Pojedyncza próba pomiarowa składała się z 30 ziarn pyłku, a ogółem poddano analizie 240 ziarn. Ziarna pyłku przebadano pod względem sześciu cech ilościowych (długość osi długiej – LA, długość osi krótkiej – SA, grubość egzyny wzdłuż osi długiej – Ex, stosunek SA/LA i Ex/LA oraz długość „sulcus” – wydłużonego otworu ułożonego dystalnie) oraz cech jakościowych takich jak zarys i kształt ziarn pyłku oraz urzeźbienie powierzchni egzyny. Wykazano, że wartość taksonomiczna tych cech jest znacząca, szczególnie na poziomie sekcji, oraz że cechy te nie umożliwiają rozróżnienia pojedynczych gatunków Allium, a tylko ich grup. Analizowane cechy ziarn pyłku charakteryzował średni (LA, SA i SA/LA) lub wysoki (Ex, Ex/LA) poziom zmienności. Wśród badanych gatunków najniższy poziom zmienności reprezentowały ziarna pyłku A. victorialis, a najwyższy – A. vineale i A. oleraceum.
Dostawca treści:: Biblioteka Nauki

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