Abstract
The present study aimed to investigate the effects of sodium silicate (Si) and methyl jasmonate (MeJA) on the pigments and antioxidant activity of tomato, under salinity stress. For this purpose, completely randomized factorial design with three factors including three levels of salinity (0, 4 and 6 dS m-1), Si (0, 4 and 8 mM) and MeJA (0, 5 and 7.5 μM), and three replications was used. The present study displayed that the increase in salinity level reduced chlorophyll index, fluorescence, and vitamin C; however, the catalase (CAT) and ascorbate peroxidase (APX) activities increased. MeJA and Si enhanced the chlorophyll index and vitamin C at different salinity levels, respectively. CAT and APX decreased when the salinized plants were treated with MeJA and Si. MeJA and Si may act to mitigate the adverse effect of salinity stress by reducing the H2O2 production. Finally, it can be concluded that MeJA and Si partially offset the adverse impacts of salinity stress.
Highlights
The present study aimed to investigate the effects of sodium silicate (Si) and methyl jasmonate (MeJA) on the pigments and antioxidant activity of tomato, under salinity stress
The results revealed that the double interactions between MeJA with salinity and MeJA with Si were significant for chlorophyll index (P
The present study displayed that the increase in salinity level reduced chlorophyll index and fluorescence while vitamin C, CAT and ascorbate peroxidase (APX) activities were increased
Summary
The present study aimed to investigate the effects of sodium silicate (Si) and methyl jasmonate (MeJA) on the pigments and antioxidant activity of tomato, under salinity stress. For this purpose, completely randomized factorial design with three factors including three levels of salinity (0, 4 and 6 dS m-1), Si (0, 4 and 8 mM) and MeJA (0, 5 and 7.5 μM), and three replications was used. Methyl Jasmonate (MeJA) alleviates the harmful effects of salinity in tomato plants by inducing biochemical and physiological resistance mechanisms (Manan et al 2016). The present study aimed to investigate the effects of MeJA and Si on pigments and antioxidant activity of tomato under salinity stress
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