Metabolic profiling of plant extracts using direct-injection electrospray ionization mass spectrometry allows for high-throughput phenotypic characterization according to genetic and environmental effects - García-Flores, M; Juárez-Colunga, S; García-Casarrubias, A; Trachsel, S; Winkler, R; Tiessen, A (J Agric Food Chem, 2015)