In the transverse section of a mature anther identify all the six parts and explain their roles
Answers
1. Epidermis- Outermost, single layered and protective in function.
2. Endothecium-Cells of this layer have alpha-cellulosic fibrous bands arising from inner tangential wall which help in dehiscence of anther due to their hygroscopic nature.
3. Middle layer- Cells of this layer are ephemeral and are 1-3 layered. It degenerates at maturity.
4. Tapetum- This is the innermost layer of anther wall which surrounds the sporogenous tissue. Tapetal cells nourishes the developing pollen grains. The tapetal cells show increase in their DNA content, dense cytoplasm generally more than one nucleus and polyploid condition.
5. Sporogenous tissue- When the anther is young, sporogenous tissue occupies the centre of each microsporangium.
6. Connective- The two anther lobes are separated by a deep groove in front and are attached to each other by a band of vasculated sterile tissue called connective.