The natural functions of secondary metabolites. The antibiotics are a heterogeneous group, the functions of some being related to and others being unrelated to their antimicrobial activities. Secondary metabolites serve: (i) as competitive weapons used against other bacteria, fungi, amoebae, plants, insects, and large animals; (ii) as metal transporting agents; (iii) as agents of symbiosis between microbes and plants, nematodes, insects, and higher animals; (iv) as sexual hormones; and (v) as differentiation effectors. Although antibiotics are not obligatory for sporulation, some secondary metabolites (including antibiotics) stimulate spore formation and inhibit or stimulate germination. Formation of secondary metabolites and spores are regulated by similar factors. This similarity could insure secondary metabolite production during sporulation. Thus the secondary metabolite can: (i) slow down germination of spores until a less competitive environment and more favorable conditions for growth exist; (ii) protect the dormant or initiated spore from consumption by amoebae; or (iii) cleanse the immediate environment of competing microorganisms during germination. A primary metabolite is a kind of metabolite that is directly. Some common examples of primary metabolites include. Some common examples of secondary metabolites include: ergot alkaloids. While primary metabolites have a key role in survive of. Secondary metabolites are frequently produced at highest levels during a. Microbial production of primary metabolites contributes significantly to the quality of life. The role of primary metabolites and the microbes which produce them will certainly increase in importance. What is SECONDARY METABOLITES? Applied to those compounds which do not function direcdy in biochemical activities like photosynthesis, respiration and protein synthesis which support growth. They include alkaloids, terpenoids. SECONDARY METABOLISM: THE BUILDING BLOCKS AND. 4Primary and Secondary Metabolites and Their Biological Activity Ioanna Chinou CONTENTS 4.1 Introduction. 59 4.2 Primary Metabolites.
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