Diffusion
Osmosis
Importance of Turgor in Plants
Turgor (aka how turgid cells are) → important role in maintaining shape of soft tissue in plants. → young stems and leaves of herbaceous and non-woody plants able to remain firm and erect. → due to turgor pressure within the cells
When high rate of water loss from cells → they lose turgidity and plant wilts. ⇒ movement of certain plant parts also due to changes in turgor
- Change in turgor of guard cells, cause opening and closing of stomata
Plasmolysis - causes cells to become flaccid and limp Cells: killed if they remain plasmolyzed for too long
| Not advised to add too much fertilizer around the roots of the plant. Soil solution becomes very concentrated and the WP decreases. Water molecules move out of root hair cells by osmosis | Inability of roots to absorb water + continued evaporation of water from leaves - cause plants to wilt Unless sufficient - water added to dilute soil solution - plants eventually die. |
Active Transport
Important
after membrane shrinks away from cell wall, one part usually still touches a part of wall