Nucleic acid constructs and methods for altering plant fiber...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/82 (2006.01) C12N 9/12 (2006.01) C12N 15/29 (2006.01)

Patent

CA 2672771

Nucleic acid constructs and methods are disclosed for modifying fiber length, plant height, and/or plant biomass in plant tissues. Plants are genetically engineered with constructs encoding an Arabidopsis thaliana wall-associated kinase gene, which alters fiber length and/or plant height when overexpressed under the control of a cambium/xylem preferred promoter. Plant transformants harboring a wall- associated kinase gene show increased fiber length, a trait that is thought to improve woody trees for pulping and papermaking.

L'invention concerne des constructions d'acides nucléiques et des procédés destinés à modifier la longueur des fibres, la hauteur de la variété, et/ou la biomasse végétale des tissus végétaux. Les plantes sont génétiquement modifiées au moyen de constructions codant un gène kinase associé à la paroi de l'Arabidopsis thaliana, qui modifie la longueur des fibres et ou la hauteur de la variété en cas de surexpression sous le contrôle d'un promoteur préféré de cambium/xylème. Les transformants des végétaux hébergeant le gène kinase associé à la paroi présentent une longueur de fibres augmentée, une caractéristique permettant d'améliorer les arbres ligneux destinés à la réduction en pâte et à la fabrication de papier.

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