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Identification of the structure and origin of thioacidolysis marker compounds for cinnamyl alcohol dehydrogenase deficiency in angiosperms Inra
Kim, H.; Ralph, J.; Lu, F.; Pilate, G.; Leplé, J.C.; Pollet, B.; Lapierre, C..
Molecular marker compounds, derived from lignin by the thioacidolysis degradative method, for cinnamyl alcohol dehydrogenase (CAD) deficiency in angiosperms have been structurally identified as indene derivatives. They are shown to derive from hydroxycinnamyl aldehydes that have undergone 8-O-4-cross-coupling during lignification. As such, they are valuable markers for ascertaining plant responses to various levels of CAD down-regulation. Their derivation illustrates that hydroxycinnamyl aldehydes incorporate into angiosperm lignins by endwise coupling reactions in much the same way as normal monolignols do, suggesting that the hydroxycinnamyl aldehydes should be considered authentic lignin precursors.
Tipo: Journal Article Palavras-chave: BIOSYNTHESE DE LA LIGNINE.
Ano: 2002 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007f4cdd854&uri=/notices/prodinra1/2010/11/
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NMR Evidence for benzodioxane structures resulting from incorporation of 5-hydroxyconiferyl alcohol into lignins of 0-methyltransferase-deficient poplars Inra
Ralph, J.; Lapierre, C.; Lu, F.; Marita, J. M.; Pilate, G.; Van Doorsselaere, J.; Boerjan, W.; Jouanin, L..
Benzodioxane structures are produced in lignins of transgenic poplar plants deficient in COMT, an O-methyltransferase required to produce lignin syringyl units. They result from incorporation of 5-hydroxyconiferyl alcohol into the monomer supply and confirm that phenols other than the three traditional monolignols can be integrated into plant lignins.
Tipo: Journal Article Palavras-chave: LIGNINE; LIGNANE; PLANTE TRANSGENIQUE; RMN; RESONANCE MAGNETIQUE NUCLEAIRE LIGNIN; LIGNAN; TRANSGENIC PLANT; NMR.
Ano: 2001 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007fbcdf348&uri=/notices/prodinra1/2008/11/
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