Transgenic plants synthesizing high amylose starch
OwnerUrsula Uwer, Claus Frohberg +2inventors
InventorsUrsula Uwer, Claus Frohberg, Jens Pilling, Volker Landschutze
Life of this patent
Estimating the term…
Abstract
Transgenic plant cells and plants are described which synthesise a starch which is modified in comparison with corresponding wild type plant cells and plants. The plant cells and plants described show a reduced activity of R1, BEI and BEII proteins. Furthermore, modified starches as well as methods for their production are described.
Claims29
A transgenic plant cell which has been genetically modified, wherein the genetic modification leads to the reduction of the activity of one or more R1 proteins occurring endogenously in the plant cell and to the reduction of the activity of one or more BEI proteins occurring endogenously in the plant cell and to the reduction of the activity of one or more BEII proteins occurring endogenously plant cell in comparison with corresponding plant cells of wild type plants, said cells not being genetically modified.
A method for producing a transgenic plant cell which synthesises a modified starch, wherein a plant cell is genetically modified by the introduction of one or more foreign nucleic acid molecules the presence and/or expression of which lead to the reduction of the activity of R1, BEI and BEII proteins in comparison with corresponding plant cells of wild type plants, said cells not being genetically modified.
A method for producing a transgenic plant which synthesises a modified starch, wherein
- a) a plant cell is genetically modified by introducing one or more foreign nucleic acid molecules the presence and/or expression of which lead to the reduction of the activity of R1, BEI and BEII proteins compared to corresponding plant cells of wild type plants, said cells not being genetically modified;
- b) a plant is regenerated from the cell produced according to a);
- and
- c) optionally further plants are produced from the plant produced according to step b).
Starch characterised in that it has an amylose content of at least 75% and a reduced phosphate content in comparison with starch from corresponding wild type plants which are not genetically modified.
Starch characterised in that it has an amylose content of at least 75% and a phosphate content in the C-6 position of the glucose monomers of up to 15 nmol C6-P mg−1 starch.
Dependencies are inferred from the claim text.