NUCLEIC ACID FRAGMENTS, CHIMERIC GENES AND METHODS FOR INCREASING THE METHIONINE CONTENT OF THE SEEDS OF PLANTS

摘要

This invention relates to four chimeric genes, a first encoding a plant cystathionine gamma -synthase (CS), a second encoding feedback-insensitive aspartokinase, which is operably linked to a plant chloroplast transit sequence, a third encoding bifunctional feedback-insensitive aspartokinase-homoserine dehydrogenase (AK-HDH), which is operably linked to a plant chloroplast transit sequence, and a fourth encoding a methionine-rich protein, all operably linked to plant seed-specific regulatory sequences. Methods for their use to produce increased levels of methionine in the seeds of transformed plants are provided.