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Secondary Metabolism and Cell Differentiation

  • Martin Luckner
  • Lutz Nover
  • Hartmut Böhm

Part of the Molecular Biology, Biochemistry and Biophysics book series (MOLECULAR, volume 23)

Table of contents

About this book

Introduction

1. Secondary Metabolism and Differentiation In addition to the primary metabolic reactions, which are similar in all living beings (formation and breakdown of nucleic acids and proteins as well as of their precursors, of most carbohy­ drates, of some carboxylic acids, etc. ), a vast number of metab­ olic pathways lead to the formation of compounds peculiar to a few species or even to a single chemical race only. These reac­ tions, in accord with CZAPEK (1921) and PAECH (1950), are summed up under the term "secondary metabolism", and their products are called "secondary metabolites. " The wide variety of secondary products formed in nature includes such well-known groups as alkaloids, antibiotics, cardiac glyco­ sides, tannins, saponins, volatile oils, and others. A consider­ able number of them are of economic importance in therapeutics or technology. Although secondary products are produced by micro­ organisms, higher plants, and animals (cf. LUCKNER, 1972), most of the substances are found in the plant kingdom. The lack of mechanisms for true excretion in higher plants may result in this unequal distribution, the "waste products" of metabolism in plants instead being accumulated in the vacuoles, the cell walls, or in special excretory cells or spaces of the organism ("metabolic excretion," cf. FREY-WYSSLING, 1935, 1970; MOTHES, 1966a, b, 1972; LUCKNER et al. , 1976. Many secondary substances have, however, a direct biologic func­ tion. They can be regulatory effectors, e. g.

Keywords

Cell Cell Differentiation Endoplasmatisches Reticulum Stoffwechsel Zelldifferenzierung metabolism proteins

Authors and affiliations

  • Martin Luckner
    • 1
  • Lutz Nover
    • 2
  • Hartmut Böhm
    • 2
  1. 1.Sektion PharmazieMartin-Luther-Universität Halle-WittenbergHalle/SaaleGermany
  2. 2.Forschungszentrum für Molekularbiologie und Medizin, Institut für Biochemie der PflanzenAkademie der Wissenschaften der DDRHalle/SaaleGermany

Bibliographic information

  • DOI https://doi.org/10.1007/978-3-642-81102-9
  • Copyright Information Springer-Verlag Berlin Heidelberg 1977
  • Publisher Name Springer, Berlin, Heidelberg
  • eBook Packages Springer Book Archive
  • Print ISBN 978-3-642-81104-3
  • Online ISBN 978-3-642-81102-9
  • Series Print ISSN 0077-0221
  • Buy this book on publisher's site