Flowering Plants Phylum Anthophyta or Magnoliophyta POLLEN DEVELOPMENT

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Flowering PlantsPhylum Anthophyta or
MagnoliophytaPOLLEN DEVELOPMENT
EKU General Botany Lab
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Pollen Development
overall development
anther
pollination occurs in the microspore or 2-cell
stage
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Young pollen
tapetum ( cells that nourish developing spores)
very young anther
just post-meiosis some microsporocytes and some
tetrads
older tetrads
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Pollen tubes
mature pollen and pollen tubes
In both pictures below, note the ovary, and the
ovules
The picture to the right was made by
tagging the pollen grains with a short
half-life radio- isotope. As each pollen tube
grew, the radioactivity exposed the film,
showing the pathway of each pollen tube
ovary