Transpiration is the process where water absorbed by plant roots through evaporation. It is important as it allows plants to absorb more water and nutrients from the roots while cooling the plant down. The rate of transpiration is affected by factors like light, humidity, temperature, wind, and leaf surface area. Transpirational pull refers to the pulling force inside the xylem tissue that causes water to move up from the roots to the leaves as water vapor is lost from the leaves.

1. Transpirational
pull and
Transpiration
Immanuel Pang
Wijaya Ong
Tang Hao Ling
Niekie Blom

2. Transpiration
 Transpirationis the process where by
water that is absorbed by plants, usually
through the roots, are evaporated.

3. Why Transpiration?
 Transpiration is a very important process
as it allows plants to absorb more water
from its roots receiving important nutrients
and minerals. Evaporation of water takes
place so as to make the flow of water
constant. Thus, cooling the plant down.

4. Factors affecting transpiration
 Light
 Humidity-the amount of water vapour in
the surrounding atmosphere
 Temperature
 Wind
 Leaf surface area

5. Transpirational pull
 Transpirational pull is the pulling force
developed inside xylem tissue causing the
water to move up the xylem vessel by the
loss of water vapour in the leaves

6. THE END