S. Fabriki-Ourang; H.S. Shahabzadeh
Abstract
In this study, the effects of salicylic acid and methyl jasmonate as two inducers were studied on antioxidant activity, photosynthetic pigments and flavonoids under salinity stress in Chelidonium majus L. This experiment was conducted as a factorial in a completely randomized design with four replications ...
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In this study, the effects of salicylic acid and methyl jasmonate as two inducers were studied on antioxidant activity, photosynthetic pigments and flavonoids under salinity stress in Chelidonium majus L. This experiment was conducted as a factorial in a completely randomized design with four replications at Imam Khomeini International University during 2017. The elicitors were treated as foliar and mixed with irrigation. The factors studied included elicitors at three levels (distilled water as control, 2 mM salicylic acid, and 100 µM methyl jasmonate), salinity stress at two levels, urban water as control (EC=0.62 ds/m), salinity at 30 mM NaCl (EC=3.36 ds/m), and plant organs at three levels (leaf, root, stem). The analysis of variance showed that the main effects of salinity, elicitors, organs and their interactions were significant for most of the traits. The results of mean comparison for elicitors showed that methyl jasmonate increased carotenoid, flavonoids and anthocyanin. Both salicylic acid and methyl-jasmonate treatments reduced the amount and activity of catalase, superoxide dismutase and guaiacol peroxidase enzymes under salinity stress. In mean comparison of the triple interaction effects, salinity+salicylic acid+leaf was the best combination of factors for chlorophyll (1.68 mg.g-1 FW) and carotenoid (0.54 mg.g-1 FW) contents. Also, the maximum content for anthocyanin (5.7 OD.gr-1 FW) was observed in non-salinity+methyl jasmonate+leaf and for flavonoids in salinity+non-hormone (3.42 OD.gr-1 FW), non-salinity+salicylic acid (3.27 OD.gr-1 FW) and salinity+methyl jasmonate (3.2 OD.gr-1 FW) in leaf, respectively. The amount of total protein increased in salinity+salicylic acid (56.72 mg.g-1 FW) and salinity+methyl jasmonate (53.27 mg.g-1 FW) in contrast to reduction in salinity+non-hormone (43.35 mg.g-1 FW). In conclusion, by applying the two mentioned elicitors, greater celandine does not need to increase the antioxidant defense system and will potentially improve the yield of biomass and some secondary metabolites under salinity stress.
