Question
Question: What are plant vascular tissues, name them and also differentiate between them....
What are plant vascular tissues, name them and also differentiate between them.
Explanation
Solution
Xylem and Phloem together from the vascular parts of the plant. They work together as one unit and are made up of different types of cells. Both are associated with the transportation functions in the plant.
Complete answer:
| Xylem | Phloem |
|---|---|
| -These are complex issues associated with the transportation of water and other nutrients in the plants. | -These and also complex issues associated with the transportation of food and other organic materials in the plants. |
| -Xylem is made up of different dead cells except for the xylem parenchyma which is living in nature. | -Phloem is made up of different living cells except for the phloem fibers which are dead cells. |
| -Deep inside the plant xylem is present in the center of the vascular bundle. | -The phloem is present on the outer side of theVascular bundle. |
| -The xylem consists of xylem vessels, xylem fibers, xylem parenchyma, and tracheids. | -The phloem consists of phloem fibers, phloem parenchyma, sieve cells, sieve tubes, and companion cells. |
| -The primary xylem develops from the active root cells and apical meristem. | -The primary phloem develops from the apical meristem of the shoot and the root. |
| -The secondary xylem develops as a ring around the primary xylem in hard and woody plants. | -The secondary phloem is formed in plants with cambium. |
| -Movement in the xylem is in one direction that is unidirectional flow. | -Movement in phloem is in two directions: bidirectional flow. |
| -The xylem provides mechanical support to the plant. | -The phloem does not provide mechanical support to the plant. |
| -On maturity, the xylem becomes a dead tissue lacking cell contents | -The phloem is a living tissue that does not consist of a nucleus. |
Note:
-In Angiosperms vessels are present and it has become the main characteristic of angiosperms.
-Vessels are absent in the xylem of gymnosperms.
-The phloem constituents in angiosperms are phloem fibers, phloem parenchyma, sieve tube elements, and companion cells.
-The sieve tube and companion cells are absent in gymnosperms, but sieve cells and albuminous cells are present.