Water potential
Water potential: Water potential is the difference between free energy of water in a system and the free energy of pure water at atmospheric pressure and a defined temperature. It …
Author: Padmini Garud
Availability of soil water for plants
Availability of Soil water: The source of soil water is rain. Soil is the main reservoir of water for plants. The amount of water in soil is variable, which depends …
Pathways of water : Apoplast and Symplast pathways
Pathways of water movements in roots: Apoplast and Symplast pathways Water from the soil comes into the plant mostly through root hairs in the piliferous layer of the root. …
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 …