Results 211 to 220 of about 69,690 (258)
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Evolution of development of pollen performance
2019With the origin of pollination in ancient seed plants, the male gametophyte ("pollen") began to evolve a new and unique life history stage, the progamic phase, a post-pollination period in which pollen sexual maturation occurs in interaction with sporophyte-derived tissues.
Joseph H, Williams, John B, Reese
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Pollen allergens: development and function
Sexual Plant Reproduction, 1996Pollen allergens interact with the human immune system and the resulting IgE antibodies provide specific probes for their identification and characterisation. In one case, grass allergenic proteins are expressed late in pollen development coincident with the laying down of reserves.
R. B. Knox, C. Suphioglu
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Gene Expression During Pollen Development
1992Because of allelic segregation at meiosis, post meiotic gene expression can result in considerable genetic variability in the pollen population even from single plants, and thus offers opportunities for selection among male gametophytes. Due to the haploid state and the large population size, male gametophytic selection (MGS) can be extremely efficient
C. Frova, M. E. Pè
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Pollen: Structure and Development
2011Pollen grains contain the highly reduced haploid microgametophyte generation in seed plants that establishes the male germline during sexual reproduction. Pollen protects the germline from environmental injury, promotes gamete dispersal and ensures delivery of a pair of sperm cells to the female gametes via the pollen tube.
Borg, M. ; https://orcid.org/0000-0002-3982-3843 +1 more
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Gene Activity During Pollen Development
Annual Review of Plant Physiology and Plant Molecular Biology, 1990INTRODUCTION . . . . . . . . 317 THE REGULATION AND EXPRESSION OF GENES IN THE DEVELOPING MALE GAMETOPHYTE 319 How Important is the Tapetum in Pollen Development?. . .... . . . . . . . . . . . . . . . . . . . . . . . . . . . 319 Is the Diff erentiation of the Male Gametophyte Dependent on Genes Transcribed Prior to Meiosis in the Sporophyte or Is ...
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Amylogenesis and Amylolysis During Pollen Grain Development
1988In pollen mother cells, the organelles dedifferentiate at the onset of meiosis (Bird et al., 1983). Plastids previously containing starch are completely starch-free at zygotene (Bird et al., 1983; Pacini and Franchi, 1983). Organelle dedifferentiation is accompanied by ribosome reorganization (Bird et al. 1983).
PACINI, ETTORE, FRANCHI, GIAN GABRIELE
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The Microtubular Cytoskeleton during Pollen Development and Pollen Tube Growth inNicotiana tabacum
1992The role of the male partner in the fertilization process in higher plants has been defined from long time (Stanley and Linskens, 1972). As shown by optical and ultrastructural investigations, some closely related steps such as pollen development, pollen release from the anther, pollen-stigma interaction, pollen tube emission and growth occur and each ...
Tiezzi, Antonio +5 more
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Pollen-Pistil Interactions as Reproductive Barriers
Annual Review of Plant Biology, 2021Amanda K Broz, Patricia A Bedinger
exaly