Sweaty trees?

Marc Knight Marc.Knight at plants.ox.ac.uk
Wed Jun 22 16:04:19 EST 1994

Dear All,  I know I should know this (and probably did once) why why exactly 
do trees 'sweat' in summer?  Also why does this 'sweat' contain sugars, isn't 
that rather wasteful?

Yours in ignorance,


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