Draw a well labelled diagram of T. S. of cinnamon bark and describe any four microscopical characters.

Draw a well labelled diagram of T. S. of cinnamon bark and describe any four microscopical characters.
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1 Answer

Answer :

image

Microscopy:
1. Pericyclic fibre: Small group of about 6 to 15 pericyclic lignified fibres
2. Sclerides: 3 to4 layers of pitted sclerides, thickened lignified walls, isodiametric slight
elongated tangentially (U-shaped thickening), with starch grains.
3. Secondary Phloem: Parenchyamatous: few cells contain acicular calcium oxalate
crystals and starch grains
4. Medullary rays: Biseriate, narrow at inner sight, wider in the scleride band side, contain
starch acicular raphides.
5. Phloem fibres: single, isolated, circular lignified with stratification
6. Mucilage cells: can be identified after staining with rheuthenium red
7. Oil cells: Big& isolated


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