Discuss the steps involved in Microsporogenesis .

Explanation

The stages involved in the formation of haploid microspores from diploid microspore mother cell through meiosis is cell Microsporogenesis.
(i) The primary sporogeneous cells directly,or may undergo a few mitotic divisions to form sporogenous tissue.
(ii) The last generation of sporogenous tissue functions as microspore mother cells.
(iii) Each microspore mother cell divides meiotically to form a tetrad of four haploid microspores (microspore tetrad).
(iv) The microspore tetrad may be arranged in a tetrahedral, decussate, linear, T shaped or isobilateral manner.
(v) Microspores soon separate from one another and remain free in the anther locule and develop into pollen grains.
(vi) In some plants, all the microspores in a microsporangium remain held together called pollinium.
Example: Calotropis, Compound pollen grains are found in Drosera and Drymis.