Bibliography: p. 165-168.
|Statement||by William S. Ting.|
|Series||University of California publications in geological sciences, v. 58, University of California publications in geological sciences ;, v. 58.|
|LC Classifications||QE1 .C15 vol. 58|
|The Physical Object|
|Pagination||vii, 182 p.|
|Number of Pages||182|
|LC Control Number||67063088|
A size-frequency curve for fossil pollen grains of Pinus from S. Carolina showed 3 strong modes, which was taken as evidence that 3 species were represented in the deposit. The pollens of 12 modern species of Pinus from the eastern United States were also examined, and though no ready diagnostic character was found, there was a considerable range in by: Palynol., Modern pollen grains from several species of Abies, Picea and Pinus occurring mainly in the Rocky Mountain region of the United States and Canada were examined using the scanning electron microscope. Distinguishing characteristics for the species were found using systematized observational and photographic methods on extensive by: The starch contents were ± , ± , ± , and ± ng, respectively for pollen grains from Korean red pine, golden Korean red pine, Japanese red pine Cited by: of the pollen of Pinus distributed in northeast China. Therefore, in the present study, pollen from eight representative Pinus taxa including ﬁve species and three varieties were investigated and described based on their morphological measurement and exine sculp-ture .
The comparative analysis of µFTIR spectra belonging to morphologically different Pinaceae pollen, namely bisaccate Pinus and monosaccate Tsuga pollen, was conducted. The study shows that the main cause of spectral variability is non-radial symmetry of bisaccate pollen grains, while additional variation is caused by Mie by: 9. , Vol. 18, pp. Pergamon Press Ltd. Printed in England. /79/ $/0 SEX HORMONES AND CORTICOSTEROIDS IN POLLEN OF PINUS NIGRA* MELITA ADEN-KREHULA, MELITA TART and DRAGUTIN KOLBAH Department of Chemistry, Faculty of Pharmacy and Biochemistry, University of Zagreb and Division of Endocrinology, University Cited by: Congress Abstract. European Black pine (Pinus nigra L.) is a widespread conifer in South Eastern Europe, while Pinus heldreichii Christ. var. leucodermis is a forest species endemic to the Balkan peninsula, often called white bark pine. It was recently referred by Buhner (1) that pollen from pines contains high percentage of testosterone (and other androgens) among plants which is in accordance Author: K Graikou, I Chinou. Collecting pollen for genetic resources conservation Table continued Family Species Longevity (d) Author(s) Solanum melongena Solanum tuberosum 50 18 Vasil, Vasil, Families with tricellular pollen Asteraceae Chrysanthemum 8 Hoekstra and cinerariaefo/ium Bruinsma, a Onopordon iIIyricum 8 Pfundt, File Size: 1MB.
These sacs also allow them to be carried great distances by the wind. Among winged grains, the body is subspheroidal to broadly ellipsoidal. The bladders are generally reticulate or occasionally smooth. Pollen grains vary in size from micrometers. Pine genus, single grain. Pine genus, multiple grains. The genus Pinus with species is the largest genus in the family Pinaceae. This genus is divided into sub-genus Strobus with 43 species and subgenus Pinus with 73 species (Businský, ). Pines exhibit the greatest diversity of habitat and distribution of the needle-type evergreens, being scattered throughout the Northern. The pollen grains are boat-shaped with monosulcate apertures and are bounded by two concentric wall layers: the outer thick exine and the inner thin intine (Fig. C). The exine on the lateral sides of the pollen is expanded to form two wings (sacci). Thus the pollen grains of Pinus are bisaccate indicating their anemophilous mode of pollination. Pollen of most species was collected from a variety of habitats in the spring and summer of , and the Table 1. Pollen sources and some assay conditions Acer saccharum Marsh pollen was collected from a protandrous individual in April The collection sites and dates are shown in Table 1. Pinus pollen was obtained from strobili sampled Cited by: