Question

The term used when anthers and stigmas of intersexual or perfect flowers ripen before the opening of buds is .............

• A. Chasmogamy
• B. Cleistogamy
• C. Immature pollination
• D. None of the above

Answer 1

The correct option is B Cleistogamy

Cleistogamy or automatic self-pollination describes the trait of certain plants to propagate by using non-opening, self-pollinating flowers. Especially well known in peanuts, peas and beans, this behaviour is most widespread in the grass family. The principal advantage of cleistogamy is that it requires less plant resources to produce seeds than does chasogamy because development of petals, nectar and large amounts of pollen are not required. This efficiency makes cleistogamy particularly useful for seed production on unfavourable sites or adverse conditions.