Why does water move from the soil into the root hair cells?
1 Answer
Water moves from soil into root hair cell by osmosis.
Explanation:
Osmosis is the movement of water from its higher concentration to its lower concentration through semipermeable membrane.
The cell membrane of root hair cell acts as semipermeable membrane.Various minerals and soluble organic substances are dissolved in soil water. The concentration of water is higher in soil water than in the cell sap. Water thus moves from soil into root hair cell by the process of osmosis, from the region of its higher concentration to the region of its lower concentration.
The movement of water can also be explained on the basis of osmotic potential. Osmotic potential of pure water is zero. The osmotic potential of water decreases by the addition of solute and becomes negative. Osmotic potential of water in the soil is higher than that in cell sap of root hair cell. water moves from soil into root hair cell along decreasing osmotic potential gradient.
