Active absorption of water

 Active absorption of water  When the water is absorbed due to the activity of root itself, particularly root hairs, it is called active absorption. Active absorption of water may …

Passive water absorption

Passive water absorption This theory explains that the forces responsible for absorption of water into the roots are governed by other cells.  In actively transpiring plants absorption of water …

Diffusion

Diffusion: Plant-water relations Diffusion is the movement of gas, liquid and solute molecules or ions from their region of higher concentration to the region of their lower concentration. The …

Osmosis

Osmosis Osmosis is the movement of solvent from a region of its higher concentration to a region of its lower concentration when the two are separated by a semipermeable …

Imbibition

Imbibition : Plant-Water Relations Imbibition is the absorption of water by the solid particles of an adsorbant without forming a solution . The particles which absorb water are the …

Plasmolysis in plant cell

 Plasmolysis Plasmolysis is the shrinkage of the protoplast of a cell from its cell wall under the influence of a hypertonic solution. If a plant is placed in highly …

Role of k+ in Stomatal Movement

 Role of k+ in stomatal movement: Imamura and M. Fujino (1959) found a direct correlation between stomatal movement and K+ ion concentration of guard cells. Fujino proposed that stomatal …

Opening and Closing of Stomata

Mechanism of opening and closing of stomata  Stomatal transpiration occurs when stomata are fully open.  The opening and closing of stomata is a direct response to increase or decrease …

Transpiration

Transpiration  Transpiration is the process of loss of water in the form of vapours from the aerial portions of the  plant.  Less than 5% of total water absorbed by …