| 摘要 |
The present invention relates to a method for the production of fatty acid esters which comprise unsaturated fatty acids with at least three double bonds, and to free unsaturated fatty acids with a content of at least 1% by weight based on the total fatty acids present in the plants, by expressing at least one nucleic acid sequence which encodes a polypeptide with &Dgr;6-desaturase activity and at least one nucleic acid sequence which encodes a polypeptide with &Dgr;6-elongase activity. Advantageously, these nucleic acid sequences can, if appropriate, be expressed in the transgenic plant together with a third nucleic acid sequence which encodes a polypeptide with &Dgr;5-desaturase activity. The invention furthermore relates to the use of defined nucleic acid sequences which encode polypeptides with a &Dgr;6-desaturase activity, &Dgr;6-elongase activity or &Dgr;5-desaturase activity selected from a group of nucleic acid sequences, and/or to the use of nucleic acid constructs comprising the abovementioned nucleic acid sequences.
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