Question

In a group discussion on pollination, Shubham argued that Cleistogamy was a type of Xenogamy whereas Ameena was of the opinion that it was a kind of Autogamy. Whose argument is correct? Justify.

Hint:

Cleistogamous flowers ensure seed-set even in the absence of pollinators.

Answer 1

Step 1: Understanding the Concept:
Autogamy is self-pollination. Xenogamy is cross-pollination. Cleistogamy is the state of flowers that never open.

Step 2: Detailed Explanation:
Cleistogamous flowers are closed flowers. Since the flowers do not open, the pollen from the anther can only fall on the stigma of the same flower.
This ensures obligatory autogamy (self-pollination). There is no chance of cross-pollination (Xenogamy) occurring.

Step 3: Final Answer:
Ameena's argument is correct because cleistogamy prevents the entry of foreign pollen, ensuring internal self-pollination.