Question

Which of the following mechanisms help in preventing self-pollination in flowers?

• A. Dichogamy
• B. Protandry
• C. Herkogamy
• D. All of the above

Answer 1

The correct option is D All of the above

In hermaphroditic flowers common way of preventing self-pollination is to have the pollen shed either before or after the period during which stigmas on the same plant are receptive. This condition is known as dichogyny.

Protandry is a condition in which staments mature earlier than pistils which also prevents self-pollination.

Presence of any physical barrier between stamens and stigmas such as hyaline membrane is known as herkogamy. Herkogamy is a common strategy employed by hermaphroditic angiosperms to reduce sexual interference between male (anthers) and female (stigma) function.

Thus, the correct answer is option (D).