*2.1. Chemicals*

Methyl jasmonate, *o*-phthalaldehyde (OPT), 2,4-dinitrophenylhydrazine (DNPH), 1,1- ,3,3- -tetraethoxypropane, horseradish peroxidase, nitrate reductase, β-nicotinamide adenine dinucleotide (NADH), 2- -7- -dichlorofluorescein-diacetate (DCFH-DA), oxidized dichlorofluorescein

(DCF), reduced glutathione (GSH) and oxidized glutathione (GSSG) were purchased from Sigma Chemical Co (St. Louis, MO, USA). All other chemicals were of analytical grade.
