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Plant Water Relation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPlant Water Relation3 Marks
Question
What is transpiration? Explain role of transpiration.
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Answer

Transpiration : The loss of water from plant body in the form of vapour is called transpiration.

Role of transpiration:

  1. Removal of excess of water
  2. Helps in passive absorption of water and minerals
  3. Helps in ascent of sap – transpiration pull
  4. Maintains turgor of cells
  5. Imparts cooling effect by reducing temperature 90% – 93% is stomatal transpiration and hence when stomata are open gaseous exchange takes place.

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