Question
Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
Solution 1
Cross-pollination cannot occur in cleistogamous flowers. This is because cleistogamous flowers never open at all. Also, the anther and the stigma lie close to each other in these flowers. Hence, only self-pollination is possible in these flowers.
Solution 2
Cross-pollination cannot occur in cleistogamous flowers. These flowers remain closed thus causing only self-pollination. In cleistogamous flowers, anthers dehisce inside the closed flowers. So the pollen grains come in contact with stigma. Thus there is no chance of cross¬pollination, e.g., Oxalis, Viola
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Solution Can Cross-pollination Occur in Cleistogamous Flowers? Give Reasons for Your Concept: Pre-fertilisation - Structures and Events - Pollination.
