Transgenic plants with enhanced growth characteristics

Details Transgenic plants with enhanced growth characteristics Transgenic plants with enhanced growth characteristics

C - Chemistry, Metallurgy

12

N

C12N 15/82 (2006.01) A01H 5/00 (2006.01) C12N 15/00 (2006.01) C12N 15/52 (2006.01) C12N 15/54 (2006.01)

Patent

CA 2735646

Disclosed are transgenic plants exhibit-ing dramatically enhanced growth rates, greater seed and fruit/pod yields, earlier and more productive flower-ing, more efficient nitrogen utilization, increased toler-ance to high salt conditions, and increased biomass yields Transgenic plants engineered to overexpress both glutamine phenylpyruvate transaminase (GPT), and glu-tamine synthetase (GS) are provided The GPT +GS double-transgenic plants consistently exhibit enhanced growth characteristics, with TO generation lines show-ing an increase in biomass over wild type counterparts of between 50% and 300% Generations that result from sexual crosses and/or selling typically perform even bet-ter, with some of the double-transgenic plants achieving an astounding four-fold biomass increase over wild type plants

Linvention concerne des plantes transgéniques présentant des taux de croissance remarquablement améliorés, des rendements en graines et fruits/cabosses supérieurs, une floraison plus précoce et plus productive, une utilisation plus efficace de lazote, une tolérance accrue aux conditions fortement salines et des rendements en biomasse accrus. Dans un mode de réalisation, linvention concerne des plantes transgéniques fabriquées pour surexprimer la glutamine-phénylpyruvate transaminase (GPT) et la glutamine synthétase (GS). Les plantes doublement transgéniques GPT+GS de linvention présentent systématiquement des caractéristiques de croissance améliorées, avec des lignées générationnelles T0 présentant une augmentation de la biomasse comprise entre 50 % et 300 % par rapport au type sauvage. Les générations résultant de croisements sexuels et/ou dendogamie donnent généralement des résultats encore meilleurs, certaines des plantes doublement transgéniques atteignant une augmentation de la biomasse impressionnante, quatre fois supérieure à celle des plantes de type sauvage.

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