| Xylem |
Phloem |
| Definition |
| Xylem tissues are the tubular-shaped structure, with the absence of cross walls. This tissue resembles the shape of a star. |
Phloem tissues are tubular-shaped, elongated, structures with the presence of walls with thin sieve tubes. |
| Location |
| It is located in the centre of the vascular bundle. |
It is located on the outer side of the vascular bundle. |
| Fibres |
| Xylem fibres are smaller. |
Phloem fibres are larger. |
| Found In |
| They are present in roots, stems and leaves. |
They are present in stems and leaves, which later transports and grow in roots, fruits and seeds. |
| Movements |
| These tissues move in a Unidirectional. (only in one direction – upward direction) |
These tissues move in a Bidirectional. (both ways – up and down) |
| Comprises |
| They live with hollow dead cells. |
They live with cytoplasm without the nucleus. |
| No of Tissues |
| The total amount of xylem tissue is more. |
The total amount of phloem tissue is less. |
| Features |
| It consists of tracheids, vessel elements, xylem parenchyma, xylem sclerenchyma and xylem fibres. |
It consists of four elements: companion cells, sieve tubes, bast fibres, phloem fibres, intermediary cells and the phloem parenchyma. |
| Functions |
| Transports soluble mineral nutrients and water molecules from the roots to the aerial parts of the plant. |
Transports food and other nutrients including sugar and amino acids from leaves to storage organs and growing parts of the plant. |
| Vascular Bundles |
| Forms vascular bundles with phloem. |
Forms vascular bundles with xylem. |
| Functions |
| Provides mechanical strength to the plant and helps in strengthening the stem. |
Translocates the synthesized sugars by the photosynthetic areas of plants to storage organs like roots, bulbs and tubers. |
| Functions |
| It is responsible for replacing the total amount of lost water molecules through transpiration and photosynthesis. |
It is responsible for transporting proteins and mRNAs throughout the plant. |
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