Distribution of Guaiacyl and Syringyl Lignins in Japanese Beech (Fagus Crenata): Variation Within an Annual Ring

Abstract

Microspectrometry is the most definitive technique for obtaining both ultraviolet (UV) and visible light absorption spectra from a very limited area, and this technique allows the determination of lignin distribution throughout an individual cell wall. It is generally accepted that hardwood lignin .is composed mainly of guaiacyl and syringyl moieties. Our microspectrometric investigations revealed variation of lignin distribution within an annual ring in beech ( Fagus crenata ).