Deekchya Pandit

The opening and closing if stomata depends upon turgidity of guard cells.Each guard cell has a thicker wall on the sode facing stoma and a thin wall on the opposite side.Guard cells contain chloroplast.

According to K+ transport Theory, turgidity of guard cell is depending upon the entrance of K+ ions,into the guard cells.ATP helps to intake K+ ions .As the K+ ions enter into the cell, the turgidity of guard cell increases and stomata are opened.

During light malic acid is formed in the guard...

1. Role in the movement of water

2. Role in the absorption and translocation of mineral salts

3. Role of regulation of temperature

4. Role on growth and development

5. Involves in improvement in the quality of fruits

6. Transpiration help in hardening process

Significance of diffusion

Large quantities of water are absorbed by roots from the soil by osmosis

1.Cell to cell movement of water and other dissolved substances involves osmosis

2. Opening and closing of stomata depend upon the turgor pressure of guard cells.

3. Due to osmosis, the turgidity of the cells and hence the shape or form of the organs is maintained.

4. The resistance of plants to drought and frost increases with increase in osmotic pressure.

5. Turgidity of the cells of the young...

1. Temperature: It increases with increase in temperature.
2. Concentration of solute particles: More are the solute particles, more would be the osmotic pressure.
3. Pressure :More the pressure, faster will the molecules move across the membrane for they are being pushed faster across a low concentration.

Plasmolysis occurs when exosmosis takes place, i.e. if cell is kept in hypertonic solution.

in contrast, deplasmolysis occurs when water moves inside cell, i.e. if cell is placed in hypotonic solution.

The exact oppositeof palsmolysis :)

Ie. :

When a cell is placed in a hypotonic solution, the water present outside of the cell flows inwards to maintain the net water level, due to which the cell becomes turgid, this process is called deplasmolysis or cytolsis.

When a cell is placed in a hypertonic solution,the water present in the cell flows outwards to maintain the concentration gradient due to which the cytoplasm of the cell loses water andshrinks, this is called palsmolysis.