ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes

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ICSE Class 10 Chapter 5 Transpiration Revision Notes

 

Revision is very important for better conceptual understanding and securing good marks, and for Revision, Revision Notes are always considered the best. ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes are one of the most important pieces of study material that students can receive, as it will aid them to study better and reduce the level of stress that students face during the hectic year

We, at Swiflearn, provide ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes in an easy-to-understand, free downloadable PDF format for the students to frame a better understanding of the topic. Free ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes provided here are prepared by Subject Matter Experts at Swiflearn in accordance with the latest ICSE Class 10 Syllabus and CISCE guidelines. These ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes will definitely help students to save a lot of time during their examinations.

ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes by Swiflearn are so far the best and most reliable Revision Notes for ICSE Class 10 Biology. These ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes will surely increase your confidence and reduce the anxiety of examination. Students can download the FREE PDF of  ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes and use it to clear all their doubts and queries and hence, excel in their examination.

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Transpiration

 

Transpiration is the evaporative loss of water from the aerial parts of the plant (leaves and stem). Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapour and is released to the atmosphere.

 

Types of Transpiration

 

There are three types of transpiration:

 

1. Stomatal transpiration

 

This is the most dominant form of transpiration being responsible for most of the water loss in plants. It accounts for 90-95% of the water transpired from leaves. As the name suggests, the process involves the participation of the stomata or stomates, microscopic pores in the epidermis of the leaves.

Liquid water is first absorbed by the plant through its roots from the soil. It is then translocated via the xylem tissue in a continuous stream towards the mesophyll cells of the leaves. Either at the surfaces of the mesophyll cells or of the epidermal cells close to stomata, liquid water is converted to water vapour. It then escapes through the stomatal pore at the time when it is open to allow entry of CO2 and release of O2.

 

 

2. Cuticular Transpiration

 

This type of transpiration is responsible for the loss of water in plants via the cuticle. Water vapour directly diffuses through the cuticle on leaves and herbaceous stems and escapes to the atmosphere. The cuticle is a waxy or resinous layer of cutting, a fatty substance, covering the outside (epidermis) of leaves and other plant parts.

Except for the interruption by stomates and lenticels, the layer is continuous. The thickness of cuticle varies with species, but xerophytic plants generally have thicker cuticles. This layer repels water but has some permeability to water vapour.

 

 

3. Lenticular Transpiration

 

This type of transpiration is the loss of water from plants as vapour through the lenticels. The lenticels are tiny openings that protrude from the barks in woody stems and twigs as well as in other plant organs. Like cuticular transpiration, an escape of water vapour via the lenticels is too low compared to stomatal transpiration.

Similarly, lenticular transpiration tends to become significant in plants subjected to very dry conditions. Under these conditions, the stomata tend to close thus severely limiting stomatal transpiration.

 

ICSE Class 10 Biology Chapter 5 Transpiration Revision Notes PDF

 

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