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To examine the pattern and distribution of stomata on both the upper and lower surfaces of leaves.Compound microscope
Methods: Place distilled water in two watch glasses.The stomata are composed of a pair of specialized cells, known as guard cells, that encircle the opening; these cells play a key role in regulating the size of the stomatal opening.The leaf section taken from the four-o'clock plant indicates that the lower epidermis contains a significantly greater number of stomata compared to the fewer stomata present in the upper epidermis.Observe each slide under the microscope and record the number of stomata found in both the upper and lower epidermis of the four-o'clock leaf.Materials required: 1.Needles 2.Forceps 3.Safranin 5.
To examine the pattern and distribution of stomata on both the upper and lower surfaces of leaves.
These structures are crucial for gas exchange in plants. The stomata are composed of a pair of specialized cells, known as guard cells, that encircle the opening; these cells play a key role in regulating the size of the stomatal opening.
Materials required:
Methods:
Place distilled water in two watch glasses.
Make an oblique cut on the leaf.
Using forceps, carefully peel a section from the leaf's upper surface and place it in one watch glass with water.
Repeat for the lower surface of the leaf, placing it in the second watch glass with water.
Add a few drops of safranin solution to both watch glasses.
Using a brush, gently place cleaned glass slides over each peel one at a time.
Cut a square or rectangular piece from each peel with a blade.
Add a drop of glycerine to each slide using a dropper.
Carefully place a cover slip over the peel using a needle.
Observe each slide under the microscope and record the number of stomata found in both the upper and lower epidermis of the four-o’clock leaf.
The leaf section taken from the four-o’clock plant indicates that the lower epidermis contains a significantly greater number of stomata compared to the fewer stomata present in the upper epidermis.
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