Monocot primary stem is composed of several vascular boundaries immerse in the parenchymatous tissue. A: Epidermis. B: Fundamental tissue/Parenchimatous tissue. C: Phloem. D: Xylem.
What are the elements composing the monocot stem primary structure?
The primary structure of monocot stems has several vascular bundles distributed in the parenchyma tissue.
- Parenchyma / Fundamenta tissue
This is the fundamental tissue. Since monocots have bundles dispersed everywhere, it is difficult to differentiate the medulla and the cortex.
The fundamental tissue is composed of several parenchymatous cells. that store food.
This is a single-celled layer of parenchymatous cells.
It protects the stem, and is closely associated with the cuticle.
The hypodermis is located just below the epidermis. It is constituted of more than one parenchymatous cell layer.
It provides mechanical strength to the stem.
These are made of xylem and phloem cells. Their arrangement in bundles is always the same:
- Xylem faces the interior of the stem,
- Phloem is facing the exterior.
Vascular bundles are located everywhere in the stem
- they are smaller and closer to each other in the outermost area.
- they are larger and more separated near the center of the stem
Phloem
Composed of sieve tubes and companion cells.
Its function is to transport photosynthetic products to different parts of the plant where they are being used or stored.
Xylem
Composed of metaxylem vessels and protoxylem vessels.
These vessels transport water and nutrients from the ground to the whole plant.
According to this information, the correct labels are,
A → Epidermis
B → Fundamental tissue. Parenchima tissue.
C → Phloem
D → Xylem
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