entry of pollen tube into the ovule

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    After arriving in the ovary, the pollen tube finds its way into the ovule. Depending on the place of pollen tube entry into the ovule, fertilization is of three tyes.

     

  • a.Porogamy   in this type, which is most common, the pollen tube enters through the micropyle.
  • b.Chalazogamy this refers to a situation where pollen tube enters ovule at the chalazal end. This type is found in Casuarina.
  • c.Mesogamy   in the the entry of pollen tube into the ovule is through the funiculus (pistacia) or through the integuments.ep1

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fertilization in angiosperms