Question

Differentiate between xylem and phloem.​

Answer 1

Answer:

Explanation:

Xylem  AND 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.
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Answer 2

Xylem

• It contains mainly dead elements. Xylem parenchyma are only the living cells
• It conducts water & Minerals from root to stem & leaves
• Two types of conducting elements, tracheids & vessels are present
• It also provides mechanical strength to the plant.

Phloem

• It contains mainly living cells. Only phloem fibres are dead cells
• It transfers prepared food (sucrose ) from leaves to storage organs and growing points of plant body.
• Only one type of conducting element, namely sieve tubes are present.
• Only phloem fibres provides mechanical strength.