L16: EPIDERMIS CELLS

1. OBJECTIVES

- Identify the shape of epidermis cells.
- Identify and explore the parts of stoma.
- Measure dimensions of the entire cell and stoma.

2. MATERIAL

- 1 Slide
- 1 Cover slip
- Distilled water
- 10% Salt water
- Scissors
- Needle

3. PROCEDURE

- PLANT CELLS OBSERVATION:

1. Cut the stalk of the leek.
2. In the place of the cut, pull out the transparent part of the epidermis using forceps.
3. Using the brush, place the peel onto the slide containing a drop of tap water.
4. Take a cover slip and place it gently on the peel with the aid of a needle.
5. View it in the microscope.
6. Describe the change in the shape of the cells.
7. Draw a diagram with the parts of a stome: stoma,cell guards,epidermis cells.

- SALT TREATMENT:

1. Prepare a 10% of salt solution.
2. Put the salt with a dropper on the left part of the slide.
3. Place a piece of cellulose paper in the opposite part of the cover slip, and let the dissolution to go though you sample.

4. RESULTS AND OBSERVATIONS