Question

Which types of sclereids are found in fruit wall of nuts?

Answer 1

     Non-living mechanical tissue

•       Thick walled, lignified and pitted cells without protoplasm at maturity

•       Distribution: cortex, hypodermis, vascular regions of stem, leaves, fruit wall etc



    1. Sclerenchyma Fibres





Thick, elongated, spindle shaped cells with pointed tips.Narrow lumen with simple rounded pits and lignified secondary wallDistribution: cortex, pericycle, xylem and phloemTypes of Fibres:
a. Surface fibres: found on fruit wall and seed coat (e.g., coconut)b. Xylary or Wood fibres: associated with xylemc. Extraxylary or Bast fibres: seen associated with cortex, pericycle and phloemFunction of Fibres:

Provide mechanical support to the plant partsSurface fibres help in seed and fruit dispersal

      2. Sclereids



•       Small sclerenchymatous cells with highly thickened lignified walls and narrow lumen. 

      Distribution: pulp of fruits, fruit walls, cortex, pith etc





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Answer 2

Answer:

Brachysclereids (also known as 'Stone Cells')

Explanation:

According to Britannica, the fruit wall of nuts are made of stone cells or grit cells, which are indeed Brachysclereids.

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