Involvement of cinnamyl-alcohol dehydrogenase in the control of lignin formation inSorghum bicolorL. Moench

✍ Scribed by Christian Pillonel; Marcel M. Mulder; Jaap J. Boon; Birgit Forster; Andres Binder

• Publisher: Springer-Verlag
• Year: 1991
• Tongue: English
• Weight: 746 KB
• Volume: 185
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00202964

✦ Synopsis

The lignin structure and enzyme activities of normal and brown-midrib (BMR-6) mutant lines of Sorghum bicolor have been compared to identify the enzyme(s) involved in the reduction of the lignin content of the mutant. The results indicate that cinnamyl-alcohol dehydrogenase (CAD) and caffeic acid O-methyltransferase are depressed in the BMR-6 line, whereas the structural modifications correspond only to a reduction of CAD activity. Apparently, the change in the Sorghum lignin content, caused by depression of CAD activity, is accompanied by the incorporation of cinnamaldehydes into the core lignin.