Elongation factor 1 alpha concentration is highly correlated with the lysine content of maize endosperm.
AUTOR(ES)
Habben, J E
RESUMO
Lysine is the most limiting essential amino acid in cereals, and for many years plant breeders have attempted to increase its concentration to improve the nutritional quality of these grains. The opaque2 mutation in maize doubles the lysine content in the endosperm, but the mechanism by which this occurs is unknown. We show that elongation factor 1 alpha (EF-1 alpha) is overexpressed in opaque2 endosperm compared with its normal counterpart and that there is a highly significant correlation between EF-1 alpha concentration and the total lysine content of the endosperm. This relationship is also true for two other cereals, sorghum and barley. It appears that genetic selection for genotypes with a high concentration of EF-1 alpha can significantly improve the nutritional quality of maize and other cereals.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=41022Documentos Relacionados
- Characterization of maize elongation factor 1A and its relationship to protein quality in the endosperm.
- Quantitative Trait Locus Mapping of Loci Influencing Elongation Factor 1α Content in Maize Endosperm1
- The role of opaque2 in the control of lysine-degrading activities in developing maize endosperm.
- Three high-lysine mutations control the level of ATP-binding HSP70-like proteins in the maize endosperm.
- Starch branching enzyme II from maize endosperm.