Fig 4. Changes in the γECS and GSHS activity in the leaves and roots of young maize plants after 0.5 mM SA or NaSA treatment during Cd stress.

(a): γECS activity in the roots; (b): GSHS activity in the roots; (c): γECS activity in the leaves; (d): GSHS activity in the leaves. (For details see legend of Table 1).