Results 261 to 270 of about 19,459 (297)
Some of the next articles are maybe not open access.
Germination Schedules of Pollen Grains: Implications for Pollen Selection
Evolution, 1989Temps de germination d'un ensemble de grains de pollen chez Erythronium grandiflorum en fonction de la densite des grains etudies en relation avec la selection pendant la croissance du tube ...
openaire +2 more sources
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,
openaire +1 more source
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,
openaire +1 more source
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,
openaire +1 more source
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,
openaire +1 more source
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.
openaire +1 more source
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.
openaire +1 more source
openaire +1 more source
Haploid Plants from Pollen Grains
Science, 1969A 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
openaire +2 more sources
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
openaire +1 more source
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
openaire +1 more source
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 ...
openaire +2 more sources
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 ...
openaire +2 more sources
Localization of allergenic molecules in pollen grains
Allergy, 1985The 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.
openaire +2 more sources
Effect of Antiseptics on the Germination of Pollen Grains
Nature, 1946POLLEN 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.
openaire +2 more sources