What happens when you add salt water to an Elodea leaf?

What happens when you add salt water to an Elodea leaf?

Procedure: Prepare a wet mount of one leaf from the water plant Elodea using the water in which it is kept. Observe the cells under normal conditions, and make a sketch of what you see. While observing the leaf under the microscope, wick a solution of 6% NaCl (sodium chloride) across the slide. Sketch your observations.

When theElodeawas placed in the salt solution, the vacuoles disappeared and the protoplasm came away from the cell wall making the organelles appear to be clumped in the middle of the cell. Such cells are said to be plasmolyzed. This occured because the water potential inside the cells was greater than that of the salt solution.

This picture shows normal Elodea. The chloroplasts are spread throughout the cell both before the salt solution, and after the distilled water is put onto the slide. Distilled water represents a hypotonic solution, yet the cells do not burst because of the cell wall.

First consider what happens to the cells when you place the elodea leaf in the salt solution; the water in the cells tries to balance the high concentration of salt (sodium chloride) in the surrounding solution, so the water leaves the leaf, thus the cells shrink.

Roots. As the salt concentration of the soil increases, the grass will find it more difficult to extract the water they need from the soil. Once again, osmosis causes these tissues to take up or retain water at the expense of other parts of the plant, resulting in dehydration.

When plant cells are put in really salty water, water diffuses/moves out of the cell and the central vacuole shrinks. If you put a freshwater fish in salt water its cells would lose water and shrivel because the water has more salt than its cells.

When the salt solution is added, the salt ions outside the cell membrane cause the water molecules to leave the cell through the cell membrane causing it to shrink into a blob in the centre of the cell wall. The movement of water molecules is called osmosis.

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