Explain in detail the two stages of gametophytic phase in life cycle o

1.	Explain in detail the two stages of gametophytic phase in life cycle of Mosses.
Answer» 1. Gametophytic phase of the life cycle of Mosses (Musci) includes two stages namely; protonema stage and leafy stage. 2. The protonema is prostrate green, branched and filamentous (it is also called juvenile gametophyte). It bears many buds. 3. Leafy stage is produced from each bud. 4. Vegetative reproduction takes place by fragmentation and budding in secondary protonema. 5. The leafy stage has erected, slender stem like (Cauloid) main axis bearing spiral leaf like structures (Phylloid). 6. It is fixed in soil by multicellular branched rhizoids. 7. Leafy stage bears sex organs.

Explain in detail the two stages of gametophytic phase in life cycle of Mosses.

Answer»

1. Gametophytic phase of the life cycle of Mosses (Musci) includes two stages namely; protonema stage and leafy stage.

2. The protonema is prostrate green, branched and filamentous (it is also called juvenile gametophyte). It bears many buds.

3. Leafy stage is produced from each bud.

4. Vegetative reproduction takes place by fragmentation and budding in secondary protonema.

5. The leafy stage has erected, slender stem like (Cauloid) main axis bearing spiral leaf like structures (Phylloid).

6. It is fixed in soil by multicellular branched rhizoids.

7. Leafy stage bears sex organs.