Process for the production of transgenic plants that have a...

Details Process for the production of transgenic plants that have a... Process for the production of transgenic plants that have a...

C - Chemistry, Metallurgy

12

N

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

Patent

CA 2756034

The invention relates to a method for the production of transgenic plants having high starch and biomass content and yield. SSs in plants (including SSIV) and glycogen synthase in bacteria catalyse the transfer of the glucoside portion of the ADP-glucose molecule (the activated glucose donor) to a preexisting .alpha.(1- 4) glucan. However, unlike with other SSs, SSIV is capable of adding glucose units to maltotrioses. Furthermore, unlike with other "soluble" SSs, SSIV is bound to the starch granule. The invention contains the first description of the method for obtaining plants having high levels and yields of starch and biomass as a consequence of the expression of genes coding for SSIV.

L'invention concerne un procédé pour la production de plantes transgéniques qui présentent une teneur et un rendement élevés en amidon et biomasse. Les SS des plantes (y compris la SSIV) et la glycogène synthase de bactéries catalysent le transfert de la partie glucosidique de la molécule d'ADP-glucose (donneur activé de glucose) vers un glycane a(l-4) préexistant. Cependant, à la différence de ce qui se produit avec d'autres SS, la SSIV peut ajouter des unités de glucose sur des maltotrioses. En outre, à la différence de ce qui se produit avec d'autres SS "solubles", la SSIV est liée au granule d'amidon. Dans l'invention est décrite pour la première fois l'obtention de plantes qui possèdent des niveaux et rendements élevés en amidon et biomasse, comme conséquence de l'expression de gènes qui codent pour la SSIV.

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