Write a short note on secondary metabolites.

Monjur Alahi

Write a short note on secondary metabolites.


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Salim Ahmed Kawsar

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1. Secondary metabolites are small organic molecules produced by organisms that are not essential for their growth, development and reproduction. 

2. Several types of bacteria, fungi and plants produce secondary metabolites.

3. Secondary metabolites can be classified on the basis of chemical structure (e.g. SMs containing rings, sugar), composition (with or without nitrogen), their solubility in various solvents, or the pathway by which they are synthesized (e.g. phenylpropanoid produces tannins). 

4. A simple way of classifying secondary metabolites includes three main groups such as: 

  • Terpenes: Made from mevalonic acid that is composed mainly of carbon and hydrogen 
  • Phenolics: Made from simple sugars containing benzene rings, hydrogen and oxygen. 
  • Nitrogen-containing compounds: Extremely diverse class may also contain sulphur.
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