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Question

Respected BYJUS faculty

Good afternoon

My name is VANDITA YADAV and I am student of BYJUS 9th

I want to ask that what is the meaning of pith of roots where parenchymatic cells occur?

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Solution

Pith, or medulla, is a tissue in the stems of vascular plants. Pith is composed of soft, spongy parenchyma cells, which in some cases can store starch. In dicots, a pith is located in the center of the stem. In monocotyledons, it extends also into flowering stems and roots. The pith is encircled by a ring of xylem; the xylem, in turn, is encircled by a ring of phloem.

While new pith growth is usually white or pale in color, as the tissue ages it commonly darkens to a deeper brown color. In trees, pith is generally present in young growth, but in the trunk and older branches, the pith often gets replaced - in great part - by xylem. In some plants, the pith in the middle of the stem may dry out and disintegrate, resulting in a hollow stem.


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