Question

what do you understand by protoxylem? mention its characteristics​

Answer 1

Answer:

In appearance protoxylem is usually distinguished by narrower vessels formed of smaller cells. Some of these cells have walls which contain thickenings in the form of rings or helices. Functionally, protoxylem can extend: the cells are able to grow in size and develop while a stem or root is elongating.

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Answer 2

Explanation:

PROTOXYLEM

the first-formed xylem developing from procambium and consisting of narrow cells with annular, spiral, or scalariform wall thickenings

CHARACTERS

• First formed part of xylem in the vascular bundles.
• Matures before the plant organs have completed their elongation
• In the stem, protoxylem is arranged towards the centre
• In the roots, it is arranged to the periphery
• Contain large amount of parenchyma

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