Question

Mesogamy involves pollen tube entry through which structure(s)?

Options

• The chalazal end

• The micropyle

• The funicle or integuments (lateral entry)

• The synergid directly

Answer 1

Mesogamy is a rare form of pollen tube entry where the tube enters the ovule through the funicle or integuments, representing a lateral entry route. This type is found in cucurbits such as Cucurbita and in Pistacia. It occurs neither through the micropyle nor the chalaza.