title: Behavior of monolignol glucosides in angiosperms.
abstract: To examine the behavior of cinnamaldehyde and cinnamyl alcohol glucosides in lignifying tissues, angiosperms were subjected to tracer experiments using radioisotope-labeled and stable isotope-labeled glucosides. The aglycone from coniferaldehyde glucoside was efficiently incorporated into guaiacyl and syringyl lignin as a cinnamyl alcohol unit. The aglycone from coniferin was also incorporated into guaiacyl and syringyl lignin. However, some of the coniferin-derived aglycone that was incorporated into lignin passed through a cinnamaldehyde form prior to dehydrogenative polymerization. When coniferin was administered together with coniferaldehyde glucoside, syringyl units were rarely synthesized from coniferin via the cinnamyl alcohol stage, whereas numerous syringyl units were synthesized from coniferaldehyde glucoside. These observations suggest that the coniferaldehyde form is crucial for the biosynthesis of syringyl lignin in angiosperms.
authors.affiliation: Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.
authors.forename: Yukiko
authors.initials: Y
authors.lastname: Tsuji
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Fukushima
mesh_terms: D000171:Acrolein / Q000031:analogs & derivatives* / Q000378:metabolism*; D002250:Carbon Radioisotopes; D005960:Glucosides / Q000378:metabolism*; D008031:Lignin / Q000378:metabolism*; D019684:Magnoliopsida / Q000378:metabolism*; D020005:Propanols / Q000378:metabolism*; D014316:Tritium
chemical_list: D002250:Carbon Radioisotopes; D005960:Glucosides; D020005:Propanols; C434469:syringyl monolignol; C075384:coniferaldehyde; D014316:Tritium; D000171:Acrolein; D008031:Lignin; C012843:cinnamaldehyde; C020722:cinnamyl alcohol