"Collenchyma" is the typical supporting tissue of growing stems, leaves, and floral parts.
What is collenchyma?
In plants, collenchyma is a living tissue made composed of elongated cells with uneven cell walls. Cell walls of collenchyma cells contain substantial amounts of cellulose and are polygonal in appearance.
The functions of collenchyma are-
- One of the main ground, or fundamental, tissues of plants, along with parenchyma (living thin-walled tissue), and sclerenchyma, collenchyma can form cylinders or appear as single strands (dead help tissue as thick cell walls).
- The fact that collenchyma is very plastic—its cells can expand and so adapt to the organ's increased growth—is an important characteristic.
- The principal sustaining tissue for so many herbaceous plants, the tissue is mostly found in the cortex of both leaves and stems.
- In secondary-growing plants, its collenchyma tissue is really only momentarily useful before it is crushed by the formation of woody tissue.
- It frequently makes up both ridges & angles of stems as well as the vein margins in eudicot leaves. One famous instance of collenchyma tissue is the "strings" found in celery stalks.
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