Function of Filiform Apparatus

The filiform apparatus is a specialized structure present in the stigma of the flower. It plays a crucial role in the pollination process by guiding the entry of the pollen tube into the ovary. The function of the filiform apparatus is discussed in detail below:

Guiding the Entry of Pollen Tube

The filiform apparatus consists of a group of elongated cells that form a canal-like structure. The pollen tube grows through this canal, which guides its entry into the ovary. The filiform apparatus provides a path for the pollen tube to follow, ensuring that it reaches the ovules for fertilization.

Recognition of Suitable Pollen

Though the main function of the filiform apparatus is to guide the entry of pollen tube, it also helps in the recognition of suitable pollen. The stigma is coated with a sticky substance that captures the pollen grains. However, not all pollen grains are compatible with the flower, and only those that match the genetic makeup of the plant are allowed to grow. The filiform apparatus helps in recognizing the suitable pollen by providing a specific path for it to travel through.

Stimulation of Division of Generative Cell

The filiform apparatus also plays a role in the stimulation of division of the generative cell. The generative cell is responsible for the formation of the pollen tube, and the filiform apparatus provides the necessary signals for its growth.

Conclusion

In summary, the filiform apparatus plays a crucial role in the pollination process by guiding the entry of pollen tube into the ovary. It also helps in the recognition of suitable pollen and stimulates the division of the generative cell.

(d) Filiform apparatus helps in the entry of pollen tube into a synergid in ovule. Filiform apparatus is in form of finger like projection comprising a core of micro fibrils enclosed in a sheath. It resembles transfer cells meant for short distance movement of metabolites. It is responsible for the absorption of food from the nucleus.###