Results 261 to 270 of about 31,308 (299)

The Cytoskeleton of Pollen Grains and Pollen Tubes

1992
The 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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The Pollen Grain

1984
The pollen grain is the carrier of the male gametes or their progenitor cell, in higher plants. In a single unit, each grain contains all the genetic information required to specify an entire haploid plant organism (for example, pollen embryoids in tissue culture), or to unite with the female gamete at fertilization and form a diploid zygote and, hence,
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Pollen grains and biosystematics

Canadian Journal of Botany, 1982
A 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 grains

Pollen grains have very rich pharmaceutical, ethnomedicinal and/or nutritional properties. Pollen and its matrices like honey, bee bread, and bee wax are used for the treatment of wound, drug development, drug delivery, as food supplement and in the cosmetics industry.
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Haploid Plants from Pollen Grains

Science, 1969
A method is presented by which hundreds of haploid plants of various species of Nicotiana can be raised from pollen grains. Stamens should be excised when pollen grains have been individualized, but are still uninucleate and free of starch.
J P, Nitsch, C, Nitsch
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Evolution of pollen grains

The Botanical Review, 1936
If one examines a random collection of pollen grains, such as might be obtained from a sample of honey (1), the muddy bottom of a pond (10, 14), or from a sticky slide exposed to the winds (23), the forms encountered are surprisingly various, as various, in fact, as the plants which produced them. There may be the one-furrowed form of the magnolia, the
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[The development of pollen grains and formation of pollen tubes in higher plants : VI. Pollen grains of Tradescantia with two pollen tubes].

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik, 2014
Pollen tube cultures of Tradescantia paludosa, Tradescantia virginiana and the hybrid Hutchinsonii (a cross of Tradescantia virginiana and andersoniana) were placed in vitro under various physiological conditions and analyzed cyto-morphologically in regard to double-tube formation.Depending on the culture conditions and on the plant variety studied ...
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Localization of allergenic molecules in pollen grains

Allergy, 1985
The wall of the mature pollen grain contains several layers, of which the outermost, the exine, is formed by the mother plant. Numerous proteins are incorporated in the exine. During the normal germination process on the stigma, these proteins interact with the stigmatic proteins.
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Effect of Antiseptics on the Germination of Pollen Grains

Nature, 1946
POLLEN grains from many plants can be readily germinated on 30 percent solutions of cane sugar with 0.8 percent of gelatine. The rate of germination varies ; but in many Labiates it begins within fifteen minutes at room temperature, and growth is obvious under a 2/3 objective with a micrometer eyepiece.
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HELMINTHIC OVA AND POLLEN GRAINS

The Lancet, 1969
A P, Killam, J G, Bergstrom, K, Urban
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