Sexual Reproduction

Sexual Reproduction:


The procedure of deposition and transfer of pollen grains from anthers to the stigmatic surface of the flower is termed as pollination. It is a necessary event in the sexual reproduction of seed bearing plants. The pollination is a pre-requisite for making sure seed set and perpetuation of a species. The pollination is direct in Gymnosperms and indirect in Angiosperms.

There are two main kinds of pollination: self pollination and cross pollination.

Self Pollination:

This is the procedure of transfer of pollen grains from anthers to the stigma of either the same flower or the other flower borne on similar plant. Accordingly, self pollination is of two kinds: autogamy and geitonogamy.

Cross Pollination (Allogamy, Xenogamy):

Cross Pollination includes the transfer of pollen grains from the flower of one plant to the stigma of the flower of the other plant. It is also termed as Xenogamy.

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