Fig. 7From: Metabolomic analyses reveal substances that contribute to the increased freezing tolerance of alfalfa (Medicago sativa L.) after continuous water deficitNumbers of differential metabolites at the class and subclass levels. Names on the abscissa represent subclasses, gray parts above the plot represent classes. Within-phase and between-phase comparisons revealed metabolites affected by water deficit and low temperature, respectively. WW and WD: substrate moisture at 80 and 25% of water-holding capacity, respectively. WD_1, 2, 3 and WW_1, 2, 3 represent samples collected at the ends of phases 2, 3, and 4, respectivelyBack to article page