Collenchyma
Living cells with thickened corners, providing mechanical support to young stems and petioles.
What is Collenchyma?
A plant tissue composed of living cells with unevenly thickened primary cell walls, providing flexible mechanical support to growing stems and petioles.
Key points
- Identify collenchyma tissue based on its structural features.
- Understand the functional role of collenchyma in plants.
- Differentiate collenchyma from other plant tissues.
- Locate the typical regions where collenchyma is found in a plant.
Common exam trap
Confusing collenchyma with sclerenchyma (dead cells, uniformly thickened walls).
Definitions
- Term
Collenchyma
- Meaning
A plant tissue composed of living cells with unevenly thickened primary cell walls, providing flexible mechanical support to growing stems and petioles.
- Term
Primary Cell Wall
- Meaning
The outer layer of a plant cell, laid down before the secondary wall, composed mainly of cellulose, hemicellulose, and pectin.
Learning objectives
Identify collenchyma tissue based on its structural features.
Understand the functional role of collenchyma in plants.
Differentiate collenchyma from other plant tissues.
Locate the typical regions where collenchyma is found in a plant.
Prerequisites
Plant Tissues (general)
Simple Permanent Tissues
Cell Wall Composition
Plant Anatomy (stems, petioles)
Common mistakes
Confusing collenchyma with sclerenchyma (dead cells, uniformly thickened walls).
Assuming collenchyma cells are dead.
Not recognizing the uneven thickening at corners as a key characteristic.
Overlooking its role in flexible support.
Keywords
Collenchyma
Plant Tissue
Mechanical Tissue
Living Cells
Thickened Cell Walls
Flexible Support
Young Stem
Petiole
Primary Wall
Cellulose
Pectin
Practice preview
In a young dicot stem, the tissue located just below the epidermis, providing support and having living cells with thickened corners, is most likely:…
medium
Collenchyma tissue is primarily found in:…
easy
The primary function of collenchyma tissue is:…
easy