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Polyamines and plant alkaloids.

B Ghosh1

  • 1Department of Botany, Bose Institute, Calcutta 700 009, India.

Indian Journal of Experimental Biology
|June 9, 2001
PubMed
Summary
This summary is machine-generated.

This review explores alkaloid biosynthesis in plants, detailing key enzymes and gene regulation. Understanding these pathways, particularly in cultured roots, offers new research directions for plant secondary metabolites.

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Area of Science:

  • Plant biochemistry
  • Molecular biology
  • Pharmacognosy

Background:

  • Alkaloids are pharmacologically active nitrogenous compounds found in plants.
  • Biosynthetic pathways vary, with some precursors like putrescine and tryptophan identified.
  • The biosynthesis of tropane and isoquinoline alkaloids remains unclear.

Purpose of the Study:

  • To review current knowledge on alkaloid biosynthesis, focusing on molecular aspects.
  • To highlight the role of specific enzymes and gene regulation in alkaloid production.
  • To discuss the utility of plant root cultures for alkaloid synthesis.

Main Methods:

  • Literature review of molecular analyses of alkaloid biosynthesis.
  • Identification of key enzymes (e.g., N-methyl transferase, arginine decarboxylase).

Related Experiment Videos

  • Discussion of gene cloning and regulation by plant hormones, light, stress, and elicitors.

    • Main Results:

    • Several key genes in alkaloid biosynthesis have been cloned.
    • Gene expression is often strongest in cultured roots induced by Agrobacterium rhizogenes.
    • Plant hormones, light, stress, and jasmonates regulate these genes.

    Conclusions:

    • Molecular insights into alkaloid biosynthesis are advancing.
    • Axenic hairy root cultures are valuable for synthesizing secondary metabolites.
    • Further research into molecular pathways can uncover new avenues for alkaloid investigation.