2.1. Stame, Microsporangium and Pollen grain

Each stamen (microsporophyll) is differentiated into the spore bearing organ, the anther and slender stalk , the filament

The anther consists of two antelopes joined together by a narrow strip of connective tissue. Each antelope contains two longitudinal running Sachs or chambers called pollen sacs. In some cases there are only two protons tax instead of 4 as in the members of family malvaceae. Each pollen sacs contains the numerous pollen grains or micraspis and a 4 or 5 layer anther wall

Structure of microsporangium:

• The microsporangium surrounded by 4 wall layer

1. Epidermis
2. Endothelium
3. Middle layer
4. Tapetum

1. Epidermis: It is a single plate and outermost and protective layer

2. Endothelium:

It is a second layer radially elongated with fibrous ticking. Address your pic in nature when it last the water help to dehiscence of the anteelobe

3. Middle layer:

It is 2-3 layers beneath the endothecium middle layer helps in dehiscence of anther love

4. Tapetum:

It is the innermost single layer helps in the management of pollen grain and helps in the formation of polynomial and its secret the enzymes

Microsporangium:

• It is a process of formation of applied microspore the male gametophyte are the pollen grain from the microspore mother cell in the pollen sac
• Problem set contains sporogenous tissue
• Sporogenous tissue differentiated into the microspore mother cell
• Each microspore mother cell undergo meiotic cell division to produce depot sports in the cluster
• At the maturity stage are separated each other after dehiense of anther lobe pollen grains are released into the atmosphere

Pollen grain:

• Pollen grain represent male gametophyte
• Pollen grains are powder in nature and shape is spherical or oval
• Pollen grains surrounded by pollen wall contains exine intone
• Outermost layer of pollen wall is exams it contains the chemical sporopollenin. It is highly resistance and with fans in the alkali acid or a temperature
• Inner layer of the pollen wall is entirely made up of cellulose and pectin
• This sporopollenin not completely deposited at the some places for called germ pore
• Pollen grain contain two cells are a spindle shaped and regular cell is vegetative cell
• Vegetative cell is called to tube wall because during the germ formation pollen tube produced by the vegetative cell
• Generative cell produced to sperms

The importance of pollen grain:

Pollen grain haile which nutrient these pollen grains used in the preparation of tablets and syrups which supplies food to the person and in the athletes and in the horses of race

Dulhan green also cause allergy and respiratory diseases like asthma, bronchitis

Allergy:

Hypersensitive response of immune system to certain antigen present in the environment

Species are caused the allergy- parthenium species amaranthus Species

Pollen grains are stored in pollen Bank. Pollen grain store in the nitrogen at the -196° C