Question

Xylem consists of four types in which xylem fibre is one of the types. Explain Xylem fibres

Answer 1

DEAR STUDENT

tracheids

vessels

xylem parenchyma

xylem fibres

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Answer 2

The fibres of sclerenchyma associated with the xylem are known as xylem fibres. Xylem fibres are dead cells and have lignified walls with narrow lumen. They cannot conduct water but being stronger provide mechanical strength. They are present in both primary and secondary xylem. Xylem fibres are also called libriform fibres.

The fibres are abundantly found in many plants. They occur in patches, in continuous bands and sometimes singly among other cells. Between fibres and normal tracheids, there are many transitional forms which are neither typical fibres nor typical tracheids. The transitional types are designated as fibre-tracheids. The pits of fibre-tracheids are smaller than those of vessels and typical tracheids.

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