2. Stomata :-
Stomata Denoted To
Small Pore Present On
Leaf , Which Are For
Mean Of Gasseous
Exchange & Transpiration
They Constituent Three
Part
-Cell Pore
- Guard Cell
- Subsidiary Cell
3. Cell Pore :-
- Pore Present On Leaf
- Help In Gasseous Exchange
- Transpiration Occur By This
4. Guard Cell
- Specialized Cell surrounds Stromatal Pore
-Always Present In Pair
- Helping Stomata In Opening & Closing
5. Subsidiary Cell
These Are Type Of Epidermal Cell Which Are
Associated With Guard Cell
They Are Morphologically Different From
Guard Cell also Called Accessory Cell
7. Open & Closed Stomata
>> Open Stomata Happen At Day Time
Closed Stomata Happen At Night Timing
>>At Open Time Transpiration Occur
At Closed Timing No Transpiration Occur
8. Types Of Guard Cell
In Dicot Leaf= Kidney Shape In Monocot Leaf= Dum bell Shape
11. Stomata Based On Ontegeny Development
Haplocheilic Type :-
Guard Cell Originate By
Stomatal initial & Neighbouring
Cell Get Concerted Into Guard
Cell
Syndetocheili Type :-
Here , Guard & Subsdiary Cell
Originate From Same mother
Cell
13. There are 4 basic types of stomata among the
dicotyledons, these types are distinguished on the
basis of the subsidiary cells surrounding the stomata
& their arrangements,
The four types are as the following
A) Anomocytic type, Ranunculaceae
B) Anisocytic type, Curciferae
C) Paracytic type, Rubiceae
D) Diacytic type, Caryophyllaceae
Types of stomata
14. The surrounding epidermal cells have no special
arrangement, they are all similar & there are no
subsidiary cells, so all the cells are normal epidermal
cells without any modification, like to stomata of
digitalis, see the following example pictures.
A) Anomocytic or Ranunuculaceae
15. The stomata is surrounded by 3 or more subsidiary
cells, one of them is distinctly smaller that the others
like in Hyoscymus niger, check the following picture.
B) Anisocytic type or Cruciferae
16. Each stoma is surrounded by 2 or more subsidiary cells,
2 of them have their long axes parallel to the pore, which
means that the axes of the subsidiary cells are parallel to
the axes of the pore like the one in senna leaves, check
the following picture.
C) Paracytic type or
Rubiaceae
17. Each stomata is surrounded by 2 subsidiary cells
having their long axes perpendicular to the pore like
in peppermint, Mentha piper, check the following
picture
D) Diacytic type, Caryophyllaceae
18.
19. Paracytic or Rubiaceous or parallel- celled stomata:
Cocca leaf, senna leaf
Diacytic or caryophyllaceous or cross-celled stomata
: Peppermint, Vasaka
Anisocytic or cruciferous or Unequial celled stomata:
Belladona, Datura
Anomocytic or ranunculaceous or irregular celled
stomata: Digitalis, Lobelia
Types of stomata and Example of
drugs
20. Anomocytic Type :-
Here , Stomata Surround With Limited
Number Of Cell , Which Cannot be
Differentiated From Other Cell
21. Anisocytic Type :-
Here, Stoma Surrounds by 3
Subsdiary Cell , In Which One cell
is Smaller Than Other Two
22. Diacytic Type :-
Here, Stomal Encloses In Pair Of
Subsidiary Cell In Which They Are
in At Right angle To Guard Cell
23. Paracytic Type :-
Here Subsidairy Cell Arranged In That
Manner They Having Same Arrangement As
Guard Cell
24. Trichomes
An elongated tubular outergrowth of epidermal cell is
called trichome or plant hair.
It consist 2 part: foot(root) & body
It may be absent also (coca) & in less amount (senna)