Exogenously applied spermidine confers protection against cinnamic acid-mediated oxidative stress in Pisum sativum

الملخص EN

This study investigated the stress responses of cinnamic acid (CA) in pea plants and explored the protec- tive role of spermidine (SPD) against CA-induced adverse effects.

Pea seedlings exposed to CA had reduced length, biomass, moisture, chlorophyll, sugar, and protein contents and reduced nitrate reduc- tase activity.

These parameters increased when SPD was applied alone and in combination with CA.

Electrolyte leakage and malondialdehyde content were high in seedlings treated with CA but decreased when the SPD + CA treatment was applied.

Foliar exposure to SPD partially mitigated CA-induced stress effects by strengthening the antioxidant defense system, which helped preserve the integrity of biochem- ical processes.

These results indicate that SPD (1 mM) could mitigate the adverse effects of CA and enhance plant defense system.

Hence, SPD can be used as a growth regulator for the maintenance of physiological functions in pea plants in response to the pernicious consequences of CA stress.