Sources include any exporting organs, typically mature leaves, that are capable of producing photosynthete in excess of their own needs.
Sinks include any nonphotosynthetic organs of the plant and organs that do not produce enough photosynthetic products to support their own growth or storage needs. Roots, tubers, developing fruits, and immature leaves, which must import carbohydrate for normal development, are all examples of sink tissues.
Sinks are always supplied by sources. Now, I want to know do all sources transport their photosythetic to all parts of plant or some sources just supply some especial sinks.
This is a question for me:
Do all sources supply all sinks on a plant?