If the temperature on the surface of the leaf goes above 85F. the leaf can no longer carry out photosynthesis (the job of converting light to food energy).
(the temperature on the surface of the leaf; goes; above 85F) (the leaf; can carry out; photosynthesis; T:no longer)
the temperature on the surface of the leaf the leaf
goes can carry out
above 85F
photosynthesis T:no longer