Question
Asked Mar 13, 2019
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Many flowers have both anthers and pistils. What prevents self-pollination and later self-fertilization?

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Expert Answer

Step 1

Self-pollination is the process in which the pollen from the anther of a flower is transferred to the stigma of the same flower. It is common pollination in hermaphrodite plants, which have both male and female sexual parts on the same flower. Self-pollination does not create new characters in the progeny and the resultant offspring are not disease-resistant.

Step 2

There are certain flowers that contain both anthers and pistils. These plants are prone to self-pollination and self-fertilization. Many flowers have occupied various methods to prevent self-pollination. These methods are as follows:

  1. Dichogamy- In such plants the maturity time of anthers and pistils are different. This prevents the plants from self-pollination. If anthers mature first, then it is termed as proterandrous and if pistils mature first, it is called protogynous.
  2. Herkogamy- It is the method in which the relat...

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