Question
Explain movement of water in the root.
✓
Answer
- Root hairs absorb water by imbibition then diffusion which is followed by osmosis.
- As water is taken inside the root hair cell it becomes turgid i.e. increase in turgor pressure (T.E)
- Root hair cell has less D.ED. but adjacent cortical cell has more D.PD.
- The inner cortical cell has more osmotic potential so it will suck water from root hair cell.
- Root hair cell becomes flaccid and ready to absorb soil water.
- Water is passed on similarly in inner cortical cells.
- Water moves rapidly through loose cortical cells up to endodermis and through passage cells in pericycle.
- From pericycle due to hydrostatic pressure developed it is forced into protoxylem.
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