J Integr Plant Biol. ›› 2010, Vol. 52 ›› Issue (2): 176-185.DOI: 10.1111/j.1744-7909.2010.00913.x

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Lignin Biosynthesis Studies in Plant Tissue Cultures

Anna Kärkönen1,2* and Sanna Koutaniemi3*   

  1. 1Department of Applied Biology, 00014 University of Helsinki, Finland
    2MTT Agrifood Research Finland, 92400 Ruukki, Finland
    3Department of Applied Chemistry and Microbiology, 00014 University of Helsinki, Finland

Abstract:

Lignin, a phenolic polymer abundant in cell walls of certain cell types, has given challenges to scientists studying its structure or biosynthesis. In plants lignified tissues are distributed between other, non-lignified tissues. Characterization of native lignin in the cell wall has been difficult due to the highly cross-linked nature of the wall components. Model systems, like plant tissue cultures with tracheary element differentiation or extracellular lignin formation, have provided useful information related to lignin structure and several aspects of lignin formation. For example, many enzyme activities in the phenylpropanoid pathway have been first identified in tissue cultures. This review focuses on studies where the use of plant tissue cultures has been advantageous in structural and biosynthesis studies of lignin, and discusses the validity of tissue cultures as models for lignin biosynthesis.

Kärkönen A, Koutaniemi S (2010) Lignin biosynthesis studies in plant tissue cultures. J. Integr. Plant Biol. 52(2), 176–185.

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