| 摘要 |
PROBLEM TO BE SOLVED: To provide compositions and methods for differential regulation of fatty acid unsaturation in membrane lipid and seed oil.SOLUTION: The invention provides methods for differential regulation of fatty acid unsaturation in seed oil and membrane lipid of plants on the basis of modulation of a previously unknown biosynthetic pathway involving a novel phosphatidylcholine: diacylglycerol cholinephosphotransferase (PDCT) that regulates phosphatidylcholine biosynthesis in developing oil seed plants. Specific aspects relate to inventive PDCT polypeptides including, for example, variants, deletions, muteins, fusion proteins, and orthologs thereof (PDCT proteins), to nucleic acids encoding these, to plants comprising such PDCT sequences or proteins, or plants devoid or depleted of such PDCT proteins or sequences, and to methods for generating plants having altered or no PDCT expression and/or activity. |
