What Is Metaxylem and Protoxylem?

Protoxylem is the first formed primary xylem that matures before the plant organs complete their elongation while metaxylem is the later formed primary xylem that matures after the completion of the growth of the plant organs. Moreover, protoxylem has smaller cells. Whereas, metaxylem contains larger cells.

What is the Metaxylem?

: the part of the primary xylem that differentiates after the protoxylem and that is distinguished typically by broader tracheids and vessels with pitted or reticulate walls.

What is a Protoxylem?

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

Marcus Vance

Marcus Vance

Cybersecurity & Digital Privacy Researcher

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.