List any 6 differences between Xylem and Phloem???
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|
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- It conducts water and minerals.
- It consists of many dead elements.
- Components of xylem include tracheids, vessels , xylem parenchyma and xylem fibres.
- three of the four elements are dead. only xylem parenchyma is living.
- In addition to conduction , xylem provides mechanical strength to plant.
- Conduction is mostly undirectional , i.e. , from roots to apical parts of the plant.
- It conducts organic solutes or food materials.
- It consists of leaveing tissue.
- Components of phloem include sieve tubes , companian cells , phloem parenchyma and phloem fibres.
- Three of four elements are living.Only phloem fibres are dead.
- Phloem performs no mechanical function for the plants.
- In it conduction may be biodirectional ,i.e., from leaves to storage organs to growing parts of plants.