University of Salahaddin-Erbil College of Education Biology department

Transpiration

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Halala Rahman Qadir M.Sc. Plant physiology

2014

Outline Define Transpiration and explain

why it occurs in plants.

Types of TranspirationImportance of Transpiration to

plant.

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Definition of Transpiration

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Transpiration: is the process of water movement

through a plant and its evaporation from aerial parts

especially from leaves.

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Types of Transpiration

Cuticular Lenticular Stomatal

Types of Transpiration 1. Cuticular Transpiration: the loss of water through

the cuticle is known as Cuticular transpiration.

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Water

Cross section of leaf

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Types of Transpiration

2. Lenticular Transpiration: Loss of water in the form of water vapour taking place through the lenticels present in woody stem and fruits.

3. Stomatal Transpiration: Stomata are minute pores confined to epidermis of green shoot and leaves.

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Types of Transpiration

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Importance of transpiration to plant

Transpiration allow the diffusion of carbon dioxide gas from the air for photosynthesis.

Transpiration cools plant.

Absorption of mineral nutrients and water from roots to shoots.

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Experiment about Transpiration

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Homework

What is the difference between transpiration and guttation?

Next lab

We will talk about the mineral nutrition in plant.

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1. Passarkli, M.(2002). Handbook of plant and crop

physiology. Second edition. New york. p835

2. Taiz, L. and E. Zeiger. (2002). Plant physiology.

Annals of botany. p.35.

3. http://en.wikipedia.org/wiki/Transpiration.

 

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References

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