In which two forms does sclerenchyma exist in the body of plants?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Solution:
- Sclerenchyma fibres (elongated, pointed cells)
- Sclereids (short, isodiametric stone cells)
Detailed Comparison:
|
Feature |
Sclerenchyma Fibres |
Sclereids |
|
Shape |
Long, narrow, needle-like |
Spherical, oval, or cylindrical |
|
Length |
Very long (can be several mm) |
Short (typically 50-300 μm) |
|
Occurrence |
Vascular tissues, bark |
Fruit walls (nuts), seed coats, pulp |
|
Function |
Mechanical support, flexibility |
Hardness, protective covering |
|
Commercial Use |
Jute, flax, hemp fibres |
Gritty texture in pears, guava |
Phylogenetic Note: Both are dead at maturity with lignified secondary walls containing numerous pits for former cytoplasmic connections.
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