2) What is function
is function of
xylem and pholema
Answers
Answer:
Following are the important differences between xylem and phloem:
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.
The function of xylem :
➨ Xylem is a conducting tissue in vascular plants.
➨ It transports water and minerals from roots to shoots and leaves in the plants.
➨ Water conducting cells also known as tracheary elements.
➨ It also provides the structural support to the plants.
The function of phloem :
➨ Phloem is a vascular tissue.
➨ Phloem carries the food and minerals by the leaves to different parts of the plant.
- Leaves are the kitchen of the plant.
- The food in plants is formed in leaves.
➨ The phloem is also known as the pathway for molecules.
➨ The phloem tissue forms a network of vessels which connects the leaves to entire plant.