What Affects the Rates of Transpiration?

HideShow resource information
Light Intensity
The brighter the light, the greater the transpiration rate. Stomata begin to close as it gets darker. Photosynthesis cannot happen in the dark, so they don't need to be open to let CO2 in. When the stomata is closed, very little water can escape
1 of 7
Temperature
The warmer it is, the faster transpiration happens. When it is warm, the water particles get more energy to evaporate and diffuse out of the stomata
2 of 7
Wind speed
The higher the wind speed around the leaf, the greater the transpiration rate. If the wind speed around the leaf is low, water vapour just surrounds the leaf and doesn't move away. This means that there is a high concentration of water particles
3 of 7
Wind speed continued...
outside the leaf as well as inside it so diffusion doesn't happen as quickly. If it is windy, the water vapour is swept away, maintaining the low concentration of water in the air around the leaf. Diffusion then happens quickly moving from an area of
4 of 7
Wind speed continued...
high concentration to an area of low concentration
5 of 7
Humidity
The drier the air, the faster transpiration happens. If the air is humid, it has a lot of water in it already so there's not much difference between the outside of the leaf and inside it. Diffusion happens fastest if there is really
6 of 7
Humidity continued...
high concentration in one place and really low concentration in another
7 of 7

Other cards in this set

Card 2

Front

Temperature

Back

The warmer it is, the faster transpiration happens. When it is warm, the water particles get more energy to evaporate and diffuse out of the stomata

Card 3

Front

Wind speed

Back

Preview of the front of card 3

Card 4

Front

Wind speed continued...

Back

Preview of the front of card 4

Card 5

Front

Wind speed continued...

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Respiration and exercise resources »