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Transpiration rates

Asked by La.Scott | Apr 14, 2008 | AS Level > Biology > Homework
La.Scott asks:

I am currently doing a practice planning exercise on how certain factors affect transpiration. I have chosen temperature as the factor to control, but i need to know WHY temperature increases transpiration. All i can find is that higher temp. increases the rate of transpiration, but does it reach a point where the rate cannot increase any longer? I also need to go into more detail on why this happens. If you could please help me, thankyou

etutor answers:
Temperature speeds up the diffucsion of water molecules out of the leaf. The effect would not 'level off, at the temperatures you would use (you can't use very high temperatures, because it would kill the plant).

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