Metabolic profiling of maize mutants deficient for two glutamine synthetase isoenzymes using 1H-NMR-based metabolomics - Broyart, C; Fontaine, J X; Molinie, R; Cailleu, D; Terce-Laforgue, T; Dubois, F; Hirel, B; Mesnard, F (Phytochem Anal, 2010)