The primary functions of roots are to anchor the tree to the ground, store carbohydrates, absorb water and nutrients, and conduct those nutrients to the vascular system of the tree.

Journal of Experimental Botany, Vol. 48, No. 314 (SEPTEMBER 1997), pp. 1703-1716 (14 pages) The anchorage mechanics of mature buttressed trees of Aglaia and Nephelium, and of non-buttressed Mallotus ...