Modification of storage proteins in the barley grain increases endosperm zinc and iron under both normal and elevated atmospheric CO₂.

ABSTRACT: Increasing atmospheric CO₂ concentration is expected to enhance the grain yield of C₃ cereal plants, while at the same time reducing the concentrations of minerals and proteins. This will lead to a lower nutritional quality and increase global problems associated with micronutrient malnutrition. Among the barley grain storage proteins, the C-hordein fraction has the lowest abundance of sulfur (S) containing amino acids and is poorest in binding of zinc (Zn). In the present study, C-hordein-suppressed barley lines with reduced C-hordein content, obtained by use of antisense or RNAi technology, were investigated under ambient and elevated atmospheric CO₂ concentration. Grains of the C-hordein-suppressed lines showed 50% increase in the concentrations of Zn an

SUBMITTER: Gao Y 

PROVIDER: S-EPMC9303220 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature