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Question

Explain the germination of pollen grain with the help of a diagram.

Prabhat Rajore · Accepted Answer

Pollen germination starts with the pollen grain landing on stigma. The cell of the pollen grain divides into two cells one of these is smaller in size and called generative cell and bigger one the tube cell. The intine grows out through the germ pore and form pollen tube. It grows into the tissue of the style towards the ovary. By this time the tube nucleus degenerates and the generative nucleus divides to form two male gametes . The pollen tube bursts open and the male gametes are released one of which then fuse with the egg cell and other nuclei with two polar nuclei.

Germination of pollen grain and formation of male gametophyte in an angiosperm.

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Sexual Reproduction In Flowering Plants

Explain the germination of pollen grain with the help of a diagram.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

The innermost layer of anther is tapetum whose function is :

In a bisexual flower when the gynaecium matures earlier than anther, it is called as :

Simultaneous meiotic division of microspore mother cells leads to :

The fertilization occurs in the :

The female gametophyte of a typical dicot at the time of fertilization is:

Development of embryo from any cell of nucellus is called :

Parthenocarpic fruit is :

The entry of pollen tube into embryo sac through the integuments is termed as :

512 microspores will be formed following meiosis of how many microspore mother cells.

Pollination by water occurs in :

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