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- #Biology
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- #Structural Organisation in Animals and Plants
The protective cover in the primary plant body is formed of
Option: 1
Epidermis
Option: 2
Hypodermis
Option: 3
Epiblema
Option: 4
Both a and c
Answers (1)
Epidermal Tissue System -
Epidermal Tissue System
- It is the outermost tissue system of the plant body involved in protection.
- It originates from the protoderm of apical meristem.
- It consists of the tissues discussed below:
Epidermis
- It is the outermost continuous layer of parenchymatous cells in the primary plant body.
- If the epidermis is a single layer, it is called uniseriate.
- If the epidermis is multi layered, it is called multiseriate.
- Multiseriate epidermis is seen in xerophytic plants, like, Ficus, Nerium, Peperomia, Cactus.
- The cells of epidermis lack intercellular spaces.
- In aerial parts of the plant, the outer cell wall of the epidermal cells is covered with a waxy substance called cutin.
- The layer of cutin is called cuticle.
- Cuticle never occurs in the epidermis of roots. The epidermis of root is called epiblema.
- Cuticle is also absent in submerged hydrophytes.
- Epidermis is the protective layer that protects the underlying tissues against mechanical injury, light intensity, thermal changes, microbial attacks, general abrasion, etc.
- Epidermis stores mucilage in succulent plants.
- In some plants, it performs photosynthesis.
-
Epidermis is the outermost continuous layer of parenchymatous cells in the primary plant body. Root epidermis is called epiblema.
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