Genetic Determinants of Pollen Phenotype
Competition among a vast number of pollen grains for a limited number of ovules creates the opportunity for very intense natural selection. Such selection, intensified by microbial-like characteristics in the pollen, gains significance from the fact that much of the plant (diplophase) structural genome is expressed in the pollen. As a result of this intense selection, pollen exhibits extremely rapid reactions upon a compatible stigma, releasing large fractions of its total protein content within minutes. These proteins are derived from both haplo- and diplo-phase cells. The first compounds released are relatively invariant and may serve to initiate species recognition reactions.
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Document Type: Research Article
Publication date: March 1, 1982
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