Later, the trees leaf out and water-using photosynthesis begins so that the pressure in the roots is relieved.
(the trees; leaf out; T:Later) (water-using photosynthesis; begins; so that the pressure in the roots is relieved) (the pressure in the roots; is relieved; )
the trees water-using photosynthesis the pressure in the roots
leaf out begins is relieved
T:Later
so that the pressure in the roots is relieved