Plant cells and plant bodies with modified cell growth,...

C - Chemistry – Metallurgy – 12 – N

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C12N 15/29 (2006.01) A01H 5/00 (2006.01) C07K 14/415 (2006.01) C12N 5/04 (2006.01) C12N 5/10 (2006.01) C12N 15/82 (2006.01)

Patent

CA 2518811

Control of cell cycle is important in crop breeding, and it is demanded to develop, through the control, technique for modifying the multiplication of plant cell, technique for modifying the development/differentiation of plant individual and plant genes for use therein. It has been clarified that plant 3Rmyb gene is a factor indispensable for the multiplication of plant cell. Thus, there are provided, with the gene as a target, technique for modifying the multiplication of plant cell and technique for modifying the development/differentiation of plant individual, and there can be obtained a plant and plant cell retaining modified cell multiplication and development/differentiation. These enable development of a plant with desirable properties, such as amelioration of hypertrophy of specified organ, male sterility or stress resistance.

Sachant que le contrôle du cycle cellulaire est important dans l'amélioration génétique des cultures, il faut, à travers une forme de contrôle, développer des techniques de modification de la multiplication des cellules végétales ainsi que de la croissance/différenciation des espèces végétales individuelles et des gènes de ces espèces. Il a été établi clairement que le gène végétal 3Rmyb était un facteur indispensable pour la multiplication des cellules végétales. En conséquence, l'invention concerne, aux fins d'application sur le gène, une technique de modification de la multiplication des cellules végétales ainsi que de la croissance/différenciation des espèces végétales individuelles, permettant d'élaborer des plantes et des cellules végétales à multiplication cellulaire et croissance/différenciation modifiées. On parvient ainsi à élaborer des plantes ayant les propriétés souhaitées, par exemple en améliorant l'hypertrophie d'un organe spécifique, la stérilité mâle ou la résistance au stress.

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