Tuesday, May 31, 2016

2.55 Explain how the rate of transpiration is affected by changes in humidity, wind speed, temperature and light intensity


Humidity
Decreases amount of transpiration because the concentration of H₂O in the air will equal that of the plant, so it can't move from high to low concentration as per usual 

Wind
Increases transpiration because water is blown away, which means there is a greater difference in H₂O concentration

Temperature
Increases transpiration: the heat makes the water evaporate more quickly.

Light intensity
Stronger light means more transpiration because leaves absorb more heat from the light, so water evaporates quicker

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