Plant cell-osmotic system The plant cell Cell wall-permeable Membrane and protoplasm Tonoplast Nucleolus Vacuole Nuclear semi-permeable Peroxisome envelo Chromatin Ribosomes endoplasmic reticulum Smooth endoplasmic reticulum
Plant cell—osmotic system ➢ The Plant Cell • Cell wall –permeable • Membrane and protoplasm – semi-permeable
If a cell is placed in a Hypotonic Solution(lower solute concentration)-water rushes in and generates turgor pressure Hypertonic Solution(higher solute concentration)-water flows out of the cell Isotonic Solution (equal solute concentration)-equilibrium
If a cell is placed in a: ➢ Hypotonic Solution (lower solute concentration) – water rushes in and generates turgor pressure. ➢ Hypertonic Solution (higher solute concentration) - water flows out of the cell. ➢ Isotonic Solution (equal solute concentration) - equilibrium
Concepts > Plasmolysis(质壁分离)- protoplast shrinks away from the cell wall Turgor pressure =0
Concepts ➢ Plasmolysis (质壁分离)- protoplast shrinks away from the cell wall. • Turgor pressure = 0
Water Potential of the plant cell Water Potential (+ 0, - 屮三屮。+++平 osmotic pressure matric gravity or solute 0or-)(+,0, (0or-)
Water Potential of the plant cell
Simplified (when height 5m) Water potential 屮=屮。+, Osmotic EssurE Corcertetian Grader Grdien