was gluconapin, followed by glucobrassicin. Some glucosinolates
(glucoiberin, glucoraphanin and 4-hydroxyglucobrassicin) were de-
tected in low concentrations in both control and treated leaves.
As shown in Fig. 1, the changes in glucosinolate contents were sig-
nificant among different plant hormone treatments. The glucobrassicin
and neoglucobrassicin were rapidly induced by MeJA treatment, and
the peaks emerged at 1 d after treatment. The maximum value of
glucobrassicin and neoglucobrassicin were 4.25 and 3.16 μmol g −1
DW,