BIOL-1507EL Lecture Notes - Lecture 3: Stamen, Microphyte, Epicotyl
14 Apr 2017
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Document Summary
In each ovule of the ovary, there is the mega-sporocyst or mega-spore mother cell, undergoes meiosis, producing 4 haploid mega-spore. In most species three of these disintegrate, leaving one, known as functional mega- spore. The functional mega-spore nucleus divides mitotically three times, until there are 8 haploid nuclei. This the female gametophyte and is called the embryo sac. The embryo sac is surrounded by the integument a part from the mircophyte. The 8 haploid nuclei arrange themselves in the embryo sac as follows. Pollination: is simply the transfer of pollen from the another(anther?) to the stigma. Pollination is brought about by the wind, water and mostly in flowering plants by animals such as insects, birds, etc Some flowers such as garden peas, are able to self fertilize, this process is called selfing" and the flower is known as self compatible. The most plants favor cross fertilization, these known as self incompatible this could be due to morphological or genetical factors.
