Abstract
Many metabolites are produced in small quantities by a limited number of species and do not appear to be essential for the growth and reproduction of the producing organisms. These compounds have been termed secondary metabolites. The interrelationship between primary metabolism and biosynthesis of some secondary metabolites is given in Fig. 9-1. All secondary metabolites are derived from intermediates of primary metabolism. Thus, biosynthetic pathways of secondary metabolites are extensions and branches of primary pathways. Consequently, the distinction between primary and secondary metabolism is not always clear. For example, terpenoid phytoalexins are generally considered to be secondary metabolites, yet they are synthesized via the same pathways from which many essential metabolites are derived. These metabolites include membrane sterols and growth regulators like gibberellins and abscisic acid.
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Huang, JS. (2001). Accumulation of Phytoalexins as a Resistance Mechanism. In: Plant Pathogenesis and Resistance. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2687-0_9
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DOI: https://doi.org/10.1007/978-94-017-2687-0_9
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5750-1
Online ISBN: 978-94-017-2687-0
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