Abstract
The mechanism of lignification is explained in terms of a free radical formation after abstraction of phenolic hydrogen from coniferyl alcohol. In plants this oxidative reaction occurs in the presence of a hydrogen peroxide-peroxidase system. In xylem cell walls the lignification mechanism has three steps: initiation (a monomer of x-mer radical is produced by the abstraction of the phenolic hydrogen); propagation (an initiated radical combines with its own monomer or x-mer); and termination (a propagated radical receives a hydroxyl radical released from the system by peroxidase). In this paper the mechanism of in-vitro synthesis of lignin from coniferyl alcohol in the presence of hydrogen peroxide and peroxidase is described.
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