Answer
Anatomy of a Monocot Stem
The monocot stem shows unique structural characteristics, which distinguish it from the dicot stem. These features help monocot plants in support and transport.
Key Features of a Monocot Stem:
- Sclerenchymatous Hypodermis: The hypodermis is made of lignified sclerenchyma cells, providing mechanical strength. Unlike dicots, it is not parenchymatous.
- Scattered Vascular Bundles: Vascular bundles are scattered throughout the ground tissue, not arranged in a ring.
- Conjoint and Closed Vascular Bundles: Xylem and phloem are present in the same bundle (conjoint), and no cambium is present between them (closed), hence no secondary growth.
- Absence of Phloem Parenchyma: Monocot phloem lacks phloem parenchyma; it contains sieve tubes and companion cells only.
Summary Table: Monocot Stem Anatomy
| Feature | Monocot Stem |
|---|---|
| Hypodermis | Sclerenchymatous |
| Vascular Bundle Arrangement | Scattered |
| Vascular Bundle Type | Conjoint and Closed |
| Phloem Parenchyma | Absent |
| Secondary Growth | Absent |