(i) Pollen-pistil interaction is an essential step in fertilisation of angiosperms. Justify. |
(ii) What steps are involved in this process? |
Answer:
(i) The events from the deposition of pollen on the stigma till the entry of pollen-tube into the ovule are collectively called pollen-pistil interaction. It is an essential step in fertilisation of angiosperms and determines compatibility and incompatibility of pollen and pistil. It is a dynamic process involving pollen recognition followed by inhibition or promotion of pollen. (ii) It includes following steps · Reognition of compatible pollen, · Growth of a pollen-tube, · Entry of pollen - tube into the ovule.
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