NEETBotanySexual Reproduction in Flowering Plants
What is the effect of having both male and female flowers on the same plant, such as in castor and maize?
Options
- AIt prevents autogamy but not geitonogamy
- BIt prevents both autogamy and geitonogamy
- CIt promotes self-pollination
- DIt synchronizes pollen release and stigma receptivity
Correct answer
A. It prevents autogamy but not geitonogamy
Step-by-step solution
Outbreeding Devices: Majority of flowering plants produce hermaphrodite flowers and pollen grains are likely to come in contact with the stigma of the same flower. Both these devices prevent autogamy. The third device to prevent inbreeding is self-incompatibility. This is a genetic mechanism and prevents self-pollen (from the same flower or other flowers of the same plant) from fertilising the ovules by inhibiting pollen germination or pollen tube growth in the pistil. Another device to prevent self-pollination is