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Expression of a poplar cDNA encoding a ferulate-5-hydroxylase/coniferaldehyde 5-hydroxylase increases S lignin deposition in Arabidopsis thaliana Inra
Sibout, R.; Baucher, M.; Gatineau, M.; Van Doorsselaere, J.; Mila, I.; Pollet, B.; Maba, B.; Pilate, G.; Lapierre, C.; Boerjan, W.; Jouanin, L..
Ferulate-5-hydroxylase or coniferaldehyde 5-hydroxylase (F5H or Cald5H; CYP84A1) is the enzyme responsible for the lasthydroxylation of the syringyl-type lignin precursors. A cDNA clone highly homologous to the Arabidopsis thaliana F5H/Cald5H cDNAwas identified during the random sequencing of a poplar (Populus trichocarpa) differentiating xylem cDNA library. Present as a multigenicfamily in poplar, this gene (PopF5H) was found to be highly expressed in lignified tissues supporting its role in lignin biosynthesis. Whenplaced under the control of the CaMV 35S promoter, the poplar F5H was able to complement the A. thaliana fah1-2 mutation.Overexpression in wild-type A. thaliana substantially increased the level of syringyl units in lignins. These transgenic...
Tipo: Journal Article Palavras-chave: BIOSYNTHESE DE LA LIGNINE; EXPRESSION DES GENES; ADNC FERULATE 5-HYDROXYLASE; POPULUS TRICHOCARPA; ARABIDOPSIS THALIANA.
Ano: 2002 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2007a66658c5&uri=/notices/prodinra1/2008/12/
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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/
Registros recuperados: 2
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