Roots supply water and nutrients to the shoots, and get back sugar and other compounds they need to live.
Roots also store food, synthesize hormones, and provide support.
Damage to the root system can often be detected from discoloration, reduced size, or death of part or all of the tree's crown. When something cuts the roots, or stops them from growing or breathing , it causes damage and threatens the life of the tree. Loss of support. When the big buttress roots are cut close to the tree, the tree has no support on that side and is prone to windfall. Loss of water.