Fig. 1From: Metabolomic analyses reveal substances that contribute to the increased freezing tolerance of alfalfa (Medicago sativa L.) after continuous water deficitThe four experimental phases in this research. The treatments are water-controlled treatments with substrate moisture at 80% (WW) and 25% of water-holding capacity (WD). Incubator temperatures were set for each of the four phases. Black dots S1 to S4 represent sampling time points at the ends of phasesBack to article page