(botany) A process of fecundation in which the pollen tube penetrates to the embryo sac through the tissue of the chalaza, instead of entering through the micropyle.

What is Chalazogamy and give example?

Chalazogamy is the entry of pollen tube through chalaza or the integuments. This was discovered by Treub. For example- Casuarina. Partial chalazogamy is found in Ulmus.

What is Porogamy Mesogamy and Chalazogamy?

Porogamy is the condition when the pollen tube enters the ovule from the micropylar end, chalazogamy is the condition of entering of pollen tube from chalaza and mesogamy is the condition when the pollen tube enters via the integuments.