Stamen

Stamen :-

They are Modified micro-sporophyll. which are concerned to form microspore

@ Types :-

i) Basified :-

When anther attach to base of anther

ii) Adnate :-

when filament all of spore

iii) Dorsified :-

When filament attach to dorsal side of anther

iv) Varsataline :-

When filament attach to dorssal surface but with very weak point & always move as air flow

@ Development Of Micro-sporangium :-

- In Young Condition at Time of initiation , some part of anther Consist outer Epidermis & inner hypodermis
- After Some time later , just below epidermis some cell become meristamatic & These cell Called archesporangium or archesporial Cell
- During These For transporting of Food & water inner dark ring are formed in middle centre
- Archesporial Cell Form 2 Cell Layer , outer Primary Pariental cell or wall & Inner Primary Sporaneous Cell

- Primary Parietal Cell Divide Form 4 Layer,
* Epidermis
* Endothecium
* Middle Layer
* Tapetum
- After That Inside tapetum layer Microsporogenesis (In Which 2n Mother Cell Divide Into 4 Haploid Microspore) Happen
- And At Last During Dehisense Few Endothecium Cell Break To Form Stronium & Microspore released in air

@ Short Note On Tapetum :-

Inner wall of Microsporangium Wall , consist of single layer wall filled with dense cytoplasm may be uni or binucleated , During Microsporogensis tapetum provide harmone , Enzyme , amino acid & Other nutritive to the sporogenesis mother Cell , In Angiospore Tapetum is of two type :-

i) Gladular Or Secretory Tapetum :-

The Cell Secrete some stem cell During Meiosis Produce proubish Body Within Cytoplasm Coated With Sporopollenin , These Body called ubish Body, Causes thickning Of Enzyme of microspore

ii) Periplamodial or Amoeboidal Tapetum :-

These Cell Dissolve Early by dissolution of wall so The tapetum Protoplast produce multinucleated plasmodium provide nourishment to dividing Microspore Mother Cell