However, transpiration is beneficial to the plants in several ways.
1) Mineral Absorption: Minerals absorbed in water are absorbed into the roots; move up through the plant in the transpiration stream.
2) Optimum Turgidity: In some plants if transpiration is not allowed to occur, plants become very turgid, do not grow well and there is shortage of water in their cells.
3) Energy Exchange: When water is evaporated from the exposed surface of cells of leaves, it exerts a cooling effect on plant.
4) Effect on Growth and Development: Transpiration is a necessary factor in the normal growth of some plants e.g. pear, sunflower.
5) Absorption of Water: Water is conducted or transported in upward direction in most tall plants due to transpiration.
6) Exchange of Gases: Wet surface of leaf cells allow gaseous exchange.
ADDITIONAL INFORMATION FOR YOUR KNOWLEDGE
What is Transpiration?
The evaporation of water from the surface of leaf cells in actively growing plants is called Transpiration. Thus more water enters the plant from the soil. The water enters the plant in the form of liquid but when it is on the surface of the leaves, it converts into gaseous form due to evaporation. The cohesive properties of water (hydrogen bonding between adjacent water molecules) allow the column of water to be ‘pulled’ up through the plants as water molecules are evaporating at the leaf surface. This process has been termed the Cohesion Theory of Sap Ascent in plants.