Class (44) = Primary and Secondary Metabolite | Difference Between Primary & Secondary Metabolite

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Primary and Secondary metabolites derived from carbon metabolism in plant
Living plants are solar-powered biochemical and biosynthetic laboratory which manufactures both primary and secondary metabolites from air, water, minerals and sunlight.
The primary metabolites like sugars, amino acids and fatty acids that are needed for general growth and physiological development of plant are widely distributed in nature and are also utilized as food by man.
The secondary metabolites are biosynthetically derived from primary metabolites. They represent chemical adaptations to environmental stresses, or serve as defensive, protective or offensive chemicals against microorganisms, insects and higher herbivorous predators. They are sometimes considered as waste or secretory products of plant metabolism and are of pharmaceutical importance. Eg. Alkaloids, glycosides, flavonoids, volatile oils etc
Primary metabolites
1. Primary metabolites are widely distributed in nature, practically in all organism
2. Directly involved in growth, development and reproduction The primary metabolites are needed for general growth and physiological development of plant
3. Generally non expensive to produce.
Eg. Starch from potato
4. Present in the plant in large quantity
5. Simple in nature
6. Generally donot have any biological or pharmacological action , utilized as food by man.
Eg. Starch, cellulose, sugar, aminoacid
Secondary metabolites
1. More limited in distribution, biosynthetically derived from primary metabolites restricted to taxonomic group
2. Not directly involved in growth and development. Required for chemical adaptations to environmental stresses, or serve as defensive, protective or offensive chemicals against microorganisms, insects and higher herbivorous predators. They are sometimes considered as waste or secretory products of plant metabolism and are of pharmaceutical importance
3. Generally expensive to produce and accumulate
Eg. Quinine from cinchona
4. Present in plants in much smaller quantities than primary metabolite
5. Complex in nature
6. Have marked pharmacological action on human body, potent in action
Eg. Quinine in cichona bark-antimalerial, Alkaloid, glycosoide, flavoinoid, essential
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