A method to modify cell number, architecture and yield of...

C - Chemistry – Metallurgy – 12 – N

Patent

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C12N 15/82 (2006.01) A01H 5/00 (2006.01)

Patent

CA 2459756

The present invention relates to a method for modifying plant growth and development processes by affecting cell cycle regulation comprising modulating expression of members of the plant E2F transcription factor family. More specific the invention relates to methods for stimulating cell division in a plant. The invention further relates to transgenic plants produced by the methods of the invention having altered plant growth and development characteristics compared to their isogenic counterparts. Preferably, the plant characteristics modified by the present invention include enlarged cotyledons, enhanced growth rate, stress resistance and seedling survival, more cells, more tillers, more panicles.

La présente invention concerne un procédé qui modifie des processus de croissance et de développement d'une plante en intervenant sur la régulation du cycle cellulaire par modulation de l'expression d'éléments de la famille du facteur de transcription de E2F chez la plante. L'invention concerne plus particulièrement des procédés de stimulation de division cellulaire chez une plante. Elle concerne en outre des plantes transgéniques produits par les procédé de l'invention, qui présentent des caractéristiques de croissance et de développement modifiées par comparaison avec leurs homologues isogéniques. De préférence, les caractéristiques de la plante telles que modifiées par le procédé de l'invention se traduisent par des cotylédons agrandis, une vitesse de croissance améliorée, la résistance au stress et la survie des semis, un nombre plus important de cellules, de tallages, de panicules.

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