First slide

Pre-fertilisation : Structures and Events

Question

Filiform apparatus

Easy

A

are finger–like projections of egg cell of embryo sac
B

are finger like projections of antipodals
C

are special cellular thickenings present at micropylar tip of central cell
D

is a part of synergid of embryo sac with finger like projections.

Solution

The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which play an important role in guiding the pollen tubes into the synergid. Pollen tube, after reaching the ovary, enters the ovule through the micropyle and then enters one of the synergids through the filiform apparatus. Many recent studies have shown that filiform apparatus present at the micropylar part of the synergids guides the entry of pollen tube.

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