فهرست نشریات علمی دسترسی آزاد ایران

This research investigated the effect of foliar spraying of jasmonic acid and salicylic acid on the morphologic traits, plant pigments, and enzyme activity of Catharanthus roseus under salt stress. The experiment was conducted using a factorial based on a completely random statistical design with three repetitions. The treatments included sodium chloride salt and foliar spraying of jasmonic acid and salicylic acid in concentrations of zero, 50, and 100 mg/l and their interaction. Two weeks after transferring the seedlings to the pot, watering with sodium chloride was done 3 times every two days. Foliar spraying was done weekly one week after applying salinity. The results showed that the highest fresh and dry weight of shoots and roots, root length, plant height, cell membrane stability index, total chlorophyll, protein content, catalase, superoxide dismutase, and peroxidase enzyme activity were observed in control and the highest flowers number and anthocyanin content were observed in 50 mg/l sodium chloride with 100 mg/l salicylic acid treatment. Also, the highest proline content was in the 50 mg/l sodium chloride treatment. According to the results, foliar application of 100 mg/l salicylic acid has an effective role in inhibiting the negative effects of salinity stress in Catharanthus roseus .