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What is transpiration How does it take place?

What is transpiration How does it take place?

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. The remaining 97–99.5% is lost by transpiration and guttation.

What is transpiration and how does it occur within a plant?

Transpiration is a process that involves loss of water vapour through the stomata of plants. The loss of water vapour from the plant cools the plant down when the weather is very hot, and water from the stem and roots moves upwards or is ‘pulled’ into the leaves.

How does transpiration occurs in a plant?

The water eventually is released to the atmosphere as vapor via the plant’s stomata — tiny, closeable, pore-like structures on the surfaces of leaves. Overall, this uptake of water at the roots, transport of water through plant tissues, and release of vapor by leaves is known as transpiration.

How does transpiration take place through stomata?

Stomata – Stomata are pores in the leaf that allow gas exchange where water vapor leaves the plant and carbon dioxide enters. Special cells called guard cells control each pore’s opening or closing. When stomata are open, transpiration rates increase; when they are closed, transpiration rates decrease.

What are the three types of transpiration?

Depending on the organ that performs transpiration, the different types are:

  • Stomatal transpiration: It is the evaporation of water through stomata.
  • Cuticular transpiration: Cuticle is an impermeable covering present on the leaves and stem.
  • Lenticular Transpiration: It is the evaporation of water through lenticels.

What is transpiration and its function?

This is transpiration. It has two main functions: cooling the plant and pumping water and minerals to the leaves for photosynthesis. Transpiration is an evaporative cooling system that brings down the temperature of plants, but since it leads to water loss, it must be accurately regulated.

What is transpiration short answer?

Transpiration is the loss of water from a plant in the form of water vapor. Water is absorbed by roots from the soil and transported as a liquid to the leaves via xylem. In the leaves, small pores allow water to escape as a vapor.

Does transpiration occur at night?

Transpiration does not take place at night, because the stomata present on the leaf surface are closed during the night hours.

What is transpiration in human?

Transpiration refers to the evaporation of water from a biological surface, such as leaves, skin, or lungs.

What are the 3 functions of transpiration?


  • transporting mineral ions.
  • providing water to keep cells turgid in order to support the plant.
  • providing water to leaf cells for photosynthesis.
  • keeping the leaves cool by evaporation.

What is transpiration best answer?

Answer: Transpiration is loss of water in vapour form through stomata.

Why stomata are closed at night?

The leaves of plants that use C3 photosynthesis absorb sunlight and carbon dioxide during the day, performing photosynthesis while the sun is out. But when the sun goes down, they can’t do photosynthesis anymore, so they close their stomata to avoid losing excess water during the night.

Why is transpiration so important?

Transpiration is the loss of excess water from the surface of the leaves, it is important because transpiration helps the plant reduce temperature in deserts, regulating the plant’s temperature and also keeps the plant fresh.

Why does light increase transpiration?

Generally light will cause an increase in transpiration in leaves. This is for two reasons. First, light causes stomates to open (these are little pores on the surfaces of leaves that connect the inside of the leaf to the atmosphere). Second, intense light will cause the leaf to warm up.

How does transpiration help plants?

Transpiration is helpful to plants in many ways. It helps in the exchange of gases. It helps in sending out excessively absorbed water by plants. It helps in the development of the plant body. It helps in the absorption and distribution of water in plants. It helps in the absorption and transport of mineral salts in plants.

What is the rate of transpiration?

The rate of transpiration is inversely proportional to relative humidity . More the relative humidity less is the transpirate rate. A high temperature lowers the relative humidity and opens the stomata even in darkness. As a result, the rate of transpiration increases. The stomata open during the day and close in the dark.