Phloem and xylem are complex tissues that perform transportation of food and water in a plant. They are the vascular tissues of the plant and together form vascular bundles. They work together as a unit to bring about effective transportation of food, nutrients, minerals and water.
|Function: ||Transportation of food and nutrients from leaves to storage organs and growing parts of plant. ||Water and mineral transport from roots to aerial parts of the plant. |
|Movement: ||Bidirectional (Moves up or down the plant 's stem from "source to sink") ||Unidirectional (Moves up the plant 's stem) |
|Occurrence: ||Roots, stems and leaves ||Roots, stems and leaves |
|Additional Functions: ||Forms vascular bundles with xylem ||Forms vascular bundles with phloem and gives mechanical strength to plant due to presence of lignified cells. |
|Structure: ||Tubular with soft walled cells ||Tubular with hard walled cells |
|Elements: ||Sieve tubes, companion cells, phloem parenchyma, bast fibers, intermediary cells ||Tracheids, vessel elements, xylem parenchyma, xylem sclerenchyma |
|Nature of tissue: ||Living tissue ||Non living tissue at maturity |