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How is the dialogue of pollen rejection maintained in the pistil?

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in Biology – Class 12 by (271k points)
How is the dialogue of pollen rejection maintained in the pistil?

(a) Stigma

(b) Nucellus

(c) Chemicals

(d) Style

This question was addressed to me at a job interview.

The doubt is from Flowering Plants Reproduction topic in section Sexual Reproduction in Flowering Plants of Biology – Class 12

1 Answer

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Correct answer is (c) Chemicals

Easiest explanation: Pistil has the power of recognizing the pollen. If the pollen is incompatible with the pistil, the pistil will not allow the growth of the pollen tube and mediate the process via chemicals, just like hormones.

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