Fig. 6From: Does long-term cadmium exposure influence the composition of pectic polysaccharides in the cell wall of Medicago sativa stems?Methanol released (nmol mg− 1 CWR) by pectin methylesterase (PME) activity (a) and saponification with 1 M KOH (b) from the cell wall of M. sativa stems in response to long-term Cd exposure. Values represent mean values from five replicates, each measured in technical replicates. SEM is represented as error bars. Significance (p-value 0.05) is indicated by an asteriskBack to article page