Diagram of anther
Vascular bundle - transport water and nutrients to anther
Stomium - where anther split to release mature pollen
Fibrous layer - layer of thickened cells which thicken when anther matures
Tapetum - provide nutrients of developing pollen
Pollen sac - contain pollen mother cells which divide by meiosis producing haploid cells that mature into pollen
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Formation of pollen grains
- In center of each pollen sac, diploid pollen mother cells divide by meiosis each, to produce four haploid cells which forms a tetrad
- Each haploid cells develop a tough, protective wall around itself becoming a pollen grain
Pollen grain diagram
NB haploid nucleus divide by mitosis to form generative nucleus and tube nucleus
