Results 271 to 280 of about 78,484 (304)
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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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HELMINTHIC OVA AND POLLEN GRAINS
The Lancet, 1969A P, Killam, J G, Bergstrom, K, Urban
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The effects of climate change on respiratory allergy and asthma induced by pollen and mold allergens
Allergy: European Journal of Allergy and Clinical Immunology, 2020Gennaro D'Amato, Nelson Rosario
exaly
Composition and functionality of bee pollen: A review
Trends in Food Science and Technology, 2020Mamta Thakur, Vikas Nanda
exaly
Pollen PCP-B peptides unlock a stigma peptide–receptor kinase gating mechanism for pollination
Science, 2021Chen Liu, Lian-ping Shen, Yu Xiao
exaly