Question

(a) Draw a diagrammatic sketch of a transverse section of an anther of an angiosperm. Label its different walls and the tissue forming microspore mother cells.
(b) Describe the process of microsporogenesis up to the formation of a microspore.
(c) Write the function of ‘germ pore’ in a pollen grain of an angiosperm.

Answer 1

The TS of the anther is attached below.

Microspore is formed from microspore mother cell by means of meiosis.

Germ pore helps the pollen tube to grow.

Explanation:

• Anther is the male reproductive structure of the plants.

• The walls of anther are four in number namely Epidermis, Endothecium, Middle layer, and Tapetum.

• Upon maturity, the pollen grains are released by means of dehiscence of this tapetum layer at stomium.

• The anther has the sporogenous cells in it which forms the microspore mother cells on maturity.

• The microspore mother cells undergoes meiosis to form the pollen grains which is four in number.

• The four pollen grains stick together until maturity, called as pollen tetrard.

• The Pollen grains has germ pore in them.

• It is the area where the pollen wall is thinner, by means of absence of exine.

• This is the region from where the pollen tube starts to grow in the style before fertilization.

For more information about microsporogenesis,

https://brainly.in/question/318051

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