DEFINITION
Stomata are small pores present on the epidermis (covering or upper most layer of plant body) which are surrounded by tow guard cell and it is responsable for exchange of gasses and transpiration process.
DIGRAM
HOW STOMATA OPEN AND CLOSE
The opening and closing of stomata are controlled by the guard cells. When water flows into the guard cells, they swell up and the curved surface causes the stomata to open. When the guard cells lose water, they shrink and become flaccid and straight thus closing the stomata.(In this process potassium ion is important)
HOW TO MAKE STOMATA SLIDE
1. Remove a healthy leaf from the potted plant.
2. Remove a part of the peel from the lower surface of the leaf. You can do this by folding the leaf over and gently pulling the peel apart using forceps. Keeps the peel in a watch glass containing water.
3. Put a few drops of safranin stain in a watch glass.
4. After 2-3 minutes take out the peel and place it on a clean glass slide.
5. Put a drop of glycerin over the peel and place a clean coverslip gently over it with the help of a needle.
6. Remove the excess stain and glycerin with the help of blotting paper.
7. Observe the slide under the low-power and high-power magnifications of the compound microscope.
LABE DIGARM OF STOMATA
DIFFERENCE BETWEEN STOMATA IN MONOCOT AND DICOT
Monocot and dicot plants contain stomata in their leaves as well as in their stem. The main difference between stomata of monocot and dicot plants is that the guard cells of the monocots are dumbbell-shaped whereas the guard cells of dicot plants are bean-shaped.
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Stomata are small pores present on the epidermis (covering or upper most layer of plant body) which are surrounded by tow guard cell and it is responsable for exchange of gasses and transpiration process.
DIGRAM
The opening and closing of stomata are controlled by the guard cells. When water flows into the guard cells, they swell up and the curved surface causes the stomata to open. When the guard cells lose water, they shrink and become flaccid and straight thus closing the stomata.(In this process potassium ion is important)
HOW TO MAKE STOMATA SLIDE
1. Remove a healthy leaf from the potted plant.
2. Remove a part of the peel from the lower surface of the leaf. You can do this by folding the leaf over and gently pulling the peel apart using forceps. Keeps the peel in a watch glass containing water.
3. Put a few drops of safranin stain in a watch glass.
4. After 2-3 minutes take out the peel and place it on a clean glass slide.
5. Put a drop of glycerin over the peel and place a clean coverslip gently over it with the help of a needle.
6. Remove the excess stain and glycerin with the help of blotting paper.
7. Observe the slide under the low-power and high-power magnifications of the compound microscope.
LABE DIGARM OF STOMATA
Monocot and dicot plants contain stomata in their leaves as well as in their stem. The main difference between stomata of monocot and dicot plants is that the guard cells of the monocots are dumbbell-shaped whereas the guard cells of dicot plants are bean-shaped.
BY ADITYA PATHAK
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