Question
Describe structure of root hair.
✓
Answer
- Water from soil is absorbed by plants with the help of root hairs.
- Root hairs are present in zone of absorption.
- Epidermal cells form unicellular extensions which are short lived (ephemeral) structures i.e. root hairs.
- Root hairs are nothing but cytoplasmic extensions of epiblema cell.
- Root hairs are long tube like structures of about 1 to 10 mm.
- They are colourless, unbranched and very delicate structures.
- A large central vacuole is surrounded by thin layer of cytoplasm, plasma membrane and outer cell wall.
- The cell wall of root hair is thin and double layered with outer layer of pectin and inner layer of cellulose which is freely permeable.
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