Results 271 to 280 of about 79,061 (307)
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Airborne Pollen Grains of Bozùyùk (Bilecik, Turkey)
Journal of Integrative Plant Biology, 2005: Airborne pollen grains in the atmosphere of Bozuyuk were investigated over a 2 yr period from 2000 to 2001 using a Durham sampler. A total number of pollen grains of 5 170 pollen grains belonging to 32 taxa were identified and recorded along with some unidentified pollen grains. Of all the pollen grains, 78.66% were arboreal, 19.20% were non-arboreal,
Türe, Cengiz, Salkurt, E.
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Pollen grains and biosystematics
Canadian Journal of Botany, 1982A review of the history of palynology and its usefulness in biosystematics, taxonomy, geology, and allergology is presented. In addition, its application to the taxonomic study of Plantago, Trifolium, Tamarix, Clarkia, and Suaeda as used by the staff at Agriculture Canada is summarized.
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Pollen grain morphology ofCoris (Primulaceae)
Plant Systematics and Evolution, 1993Pollen grain morphology, sculpturing, and wall ultrastructure are investigated in two species ofCoris (Primulaceae),C. monspeliensis L. andC. hispanica Lange. The study includes both acetolysed and unacetolysed pollen. No evidence of any major palynological difference is recorded between these two species, apart from a somewhat larger pollen inC ...
Jose S. Carrion +2 more
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Review of Palaeobotany and Palynology, 1967
The paper gives an account of Palmae pollen grains, which usually have a smooth sporoderm but rarely are spiny or warty. The sporoderm is spiny in the Pandanaceae and smooth in the Sparganiceae, families closely related to the Palmae. The classification of the Palmae into subfamilies as given by Drude (1889) and Moore (1960) has been taken as standard,
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The paper gives an account of Palmae pollen grains, which usually have a smooth sporoderm but rarely are spiny or warty. The sporoderm is spiny in the Pandanaceae and smooth in the Sparganiceae, families closely related to the Palmae. The classification of the Palmae into subfamilies as given by Drude (1889) and Moore (1960) has been taken as standard,
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The Cytoskeleton of Pollen Grains and Pollen Tubes
1992The cytoskeleton is assumed to be involved in many internal functions of the eukaryotic cell, e.g. organelle movement, mitotic and meiotic division, cell morphogenesis and cell growth (Dustin, 1984; Bershadsky and Vasiliev, 1988). Examination of a broad variaty of mono- and dicotyledones has revealed the presence of microtubules and/or actin filaments ...
E. S. Pierson, Y. Q. Li
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Sporogenesis and Pollen Grain Formation
1981Pollen grains and the spores of nonseed vascular plants1 develop from diploid somatic cells in a largely identical way. Ultimately, the cells are characterized by a highly ordered cell wall, the so-called sporoderm (Figs. 1 and 2). Both the chemical and the principal ultrastructural features of sporoderms show little Variation in different taxa ...
Brigitte Buchen, A. Sievers
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Pollen-Pistil Interactions as Reproductive Barriers
Annual Review of Plant Biology, 2021Amanda K Broz, Patricia A Bedinger
exaly
HELMINTHIC OVA AND POLLEN GRAINS
The Lancet, 1969A P, Killam, J G, Bergstrom, K, Urban
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Pollen PCP-B peptides unlock a stigma peptide–receptor kinase gating mechanism for pollination
Science, 2021Chen Liu, Lian-ping Shen, Yu Xiao
exaly
A receptor–channel trio conducts Ca2+ signalling for pollen tube reception
Nature, 2022Qi-Fei Gao, Chao Wang, Legong Li
exaly