Mean (± SE) glucosinolate content (μmol/g dry weight) of Arabidopsis thaliana Col-0 plants subjected to different Pieris brassicae feeding and egg-laying treatments.

1Abbreviation of glucosinolates: 3MSOP: 3-methylsulfinylpropyl, 4MSOB: 4-methylsulfinylbutyl, 5MSOP: 5-methylsulfinylpentyl, 8MSOO: 8-methylsulfinyloctyl, I3M: indol-3-ylmethyl, 4MOI3M: 4-methoxyindol-3-ylmethyl.2Treatments: C: leaves of untreated intact plants (N = 14); E: leaves of plants on which eggs were laid and left for 5 days (N = 14); E+F: leaves of plants on which eggs were laid then larvae hatched and fed for 2 days (N = 14); F: leaves of plants infested by larvae for 2 days, no eggs laid on plants (N = 14).Significant differences (Ppost hoc Fisher's LSD tests.