The food for plants is prepared by the green leaves by the process of photosynthesis. In this process the plant uses carbon dioxide and produce sugars in the presence of sunlight. Every part of plant body like the roots and stem also require food for its functioning so the food prepared by the leaves must be transported to different parts of the plant. The process of transportation of carbohydrates (sugar) produced by the leaves to other parts of the plant is known as translocation. It is done through Phloem tissues. The movement of carbohydrates in phloem is bidirectional.
