XVI International Botanical Congess

We have improved the nutritional quality of pulse seeds by adding a protein rich in the sulfur-containing amino acids often present in limiting quantities in animal diets. Seed methionine content was doubled in transgenic lupins expressing sunflower seed albumin (SSA). Transgenic lupins had increased nutritive value for poultry and sheep but their content of sulfur amino acids still falls short of the level required in diets for optimal animal production. We aim to further increase seed sulfur amino acid content and are investigating the limitations to increases in lupin seed methionine levels via accumulation of SSA.