Investigations on seed proteins have been intensively carried out during
the past two decades. This is valid with regard to both their chemical
composition as well as their nutritive value. The development of new
biochemical and physical methods has resulted in obtaining deep insights
into the structures of seed proteins and their mutual interactions.
Intensive exchange of information between the scientists participating
in national and international research programmes has given strong
impulses for intensifying the research in this field. For the
quantitative and quali- tative investigations of seed proteins, not only
some model plants were used; on the contrary, they were carried out on a
large number of different crops important for different regions of the
earth. In this way, a level of knowledge has been reached which could
not be expected in this diversity within such a short period. This holds
not only true for biochemical but also for physiological characters of
the species of the limiting amino acids studied. With regard to
nutritional aspects, the problem was of special interest, but also seed
proteins acting as antinutritional factors were analysed in detail.
Based on the knowledge of seed protein structures, it was possible to
perform investigations on the genetic basis of their synthesis. This was
done under two different aspects: The basic knowledge on the genes
involved should be widened; moreover, it should be tried to improve the
seed proteins quantitatively and qualitatively under the influence of
mutant genes.