Question
Distinguish between the following: Protoxylem and metaxylem.
✓
Answer
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Protoxylem
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Metaxylem
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It is the first or earlier formed xylem. Matures before the growth and differentiation of plant organs. Protoxylem elements are smaller in diameter. Tyioses absent in protoxylem vessels. Fibres are absent.
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It is the later formed xylem. Matures after the growth and differentiation of plant organs. Metaxylemd elements are broader and greater in diameter. Tyioses are generally present. Fibres may be present.
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