I'm trying to get my head around factors which affect transpiration in leaves.
For example, how would applying petroleum jelly to the surface of plant leaves affect their rate of transpiration?
I get that it's basically going to decrease the trasnpiration rate because the stomata will be covered, but I'm not sure about these parts:
- How would it affect the rate of transpiration if only the top surface was covered?
- How would it affect the rate of transpiration if only the bottom surface was covered?
Also, I think I'm right in saying that increasing wind / applying a fan to plant leaves will increase the transpiration rate, but why?