Question

‘Star spots’ present in the transverse section of decorticated Rhubarb rhizomes are‐

• A. Lignified cells
• B. Pericyclic fibres
• C. Concentric vascular bundles
• D. Crystals of calcium oxalate

Answer 1

The Correct Option is C

The question asks about the term 'Star spots' present in the transverse section of decorticated Rhubarb rhizomes. Let's examine the options one by one to determine the correct answer.

1. Lignified cells: Lignified cells are plant cells that have developed thickened cell walls containing lignin. Their primary role is providing structural support to the plant. However, they are not referred to as 'star spots.'.
2. Pericyclic fibres: These are fibres found in the pericycle and provide strength to the plant. While they are a part of the plant's structural components, they are not known as 'star spots.'
3. Concentric vascular bundles: Rhubarb rhizomes are known to have concentric vascular bundles, which are ring-like structures when viewed in cross-section. The appearance of these bundles in a transverse section gives a 'star spot' look. They are indeed responsible for the 'star spot' appearance in Rhubarb rhizomes.
4. Crystals of calcium oxalate: These are typically found in various parts of plants as waste products or forms of storage. However, their appearance does not match the description of 'star spots.'

Upon analyzing the options, the most fitting description for 'star spots' in the transverse section of Rhubarb rhizomes is Concentric vascular bundles. This corresponds to their unique arrangement and appearance in anatomy studies of the rhizomes.

Therefore, the correct answer is: Concentric vascular bundles.