What are the directions of translocation?

Translocation of organic solutes can occur in the following directions :
(a) Downward Translocation: The leaves manufacture food in excess of their own requirement. The excess food comes out of leaves and is translocated in the downward direction to stem,
(b) Upward Translocation : In deciduous plants, renewal of growth and development of new foliage
are dependent upon upward transport of food from resources present in the roots and stems.
(3) Lateral Translocation : It is little except when source and sink lie on the opposite sides.
(4) Bidirectional Translocation : Robideau and Burr found that labelled carbohydrates moved out of the leaves in both upward and downward directions