Question

Describe the various types of placentations found in flowering plants.

Answer 1

Placentation:

1. It is defined as the arrangement of ovules within the ovary.
2. several different forms of placentation can be seen in flowering plants.

Types of Placentation:

1. Marginal placentation:

1. The placenta forms a ridge that runs across the ovary's ventral suture, and ovules are borne in two rows on the ridge.
2. Example: Pea

2. Axile placentation:

1. The placenta is axial, and ovules in a multilocular ovary are linked to it.
2. Lemon is a good example.

3. Parietal placentation:

1. Ovules form on the ovary's inner wall or the ovary's periphery.
2. It is single-chambered at first but becomes two-chambered with the creation of a false septum.
3. Mustard, is an example.

4. Basal placentation:

1. A single ovule is linked to the placenta, which develops at the base of the ovary.
2. Marigold is an example.

5. Free central placentation:

1. Septa are lacking, and ovules are borne on the central axis.
2. Primrose, is an example.