difference between xylem and phloem
Answers
Answer:
difference!! are below
Explanation XYLEM AND PHLOEM ARE------
Xylem :::::::::: Phloem
Xylem tissues are tubular-shaped structure, with the absence of cross walls. This tissue resembles the shape of a star. Phloem tissues are elongated, tubular-shaped structures that include thin sieve tubes with walls.
Xylem occupies the centre of the vascular bundle. Phloem is located on the outer side of the vascular bundle.
Xylem fibres are smaller. Phloem fibres are larger.
They are present in leaves, stems, and roots. They are present in leaves, roots, stems but transports and grow in fruits seeds and roots.
These tissues move in a Unidirectional. (only in one direction – upward direction) These tissues move in a Bidirectional. (both ways – up and down)
They live with hollow dead cells. They live with cytoplasm without the nucleus.
The total amount of xylem tissue is more. The total amount of phloem tissue is less.
It consists of tracheids, vessel elements, xylem parenchyma, xylem sclerenchyma and xylem fibres. It consists of four elements: sieve tubes, companion cells, phloem fibres, bast fibres, intermediary cells and the phloem parenchyma.
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.
Forms vascular bundles with phloem. Forms vascular bundles with xylem.
Provides mechanical strength to plant and helps in strengthening of the stem. Translocates the synthesized sugars by the photosynthetic areas of plants to storage organs like roots, bulbs, and tubers.
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.
these might be your answer
Answer:
Following are the difference b/w xylem and phloem :
◆ Xylem
● Phloem
1) ◆ The term derived from a Greek word “xylon’ meaning wood .
● The term derived from a Greek word ‘phloios’ meaning bark.
2) ◆ Composed of vessels, tracheids, parenchyma and fibres.
● Composed of sieve elements (sieve cells or sieve tubes), companion cells, parenchyma and fibres.
3) ◆ Consists of mainly dead cells (only parenchyma is the living cells in the xylem).
● Consists mainly of living cells (only fibres are the dead cells in the phloem).
4) ◆ Conduct water and minerals.
● Conduct food materials.
5) ◆ Can provide mechanical support.
● Cannot provide mechanical support.
6) ◆ Amount of xylem is more than that of phloem.
● Amount of phloem is less than that of xylem.
7) ◆ Tyloses formation occurs in the xylem .
● Tyloses formation do not occur in the phloem.
8) ◆ Transport through xylem is unidirectional.
● Transport through phloem is bidirectional.
9) ◆ Xylem occupies inner to the vascular cambium.
● Phloem occupies outer to the vascular cambium.
10) ◆ The conductive tissue in the xylem is dead (Tracheids and Vessels).
● The conductive tissue in the phloem is living (Sieve elements).
11) ◆ Contain two types of conductive cells (Tracheids and Vessels).
● Contain only one type of conductive cells (Sieve elements).
12) ◆ Majority of the cells in the xylem are thick walled cells.
● Majority of the cells in the phloem are thin walled cells
13) ◆ Xylem fibres are usually smaller.
● Phloem fibres are usually larger called bast fibres.
14) ◆ In mature plants, the xylem forms the major bulk of the plant body.
● In mature plants, the phloem forms the major bulk of the bark.
15) ◆ In mature plants, the wood (xylem) is differentiated into heart wood and sap wood.
● No such differentiation of phloem occurs.