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Abstract To achieve the optimal and best growth of the plant and its production under salt stress, some materials were added in specific and sufficient quantities to obtain an ideal crop of salt-sensitive chili pepper plants. This experiment was carried out during the period (November 2022 to June 2023) in the Botanical Garden of the College of Science for women / University of Baghdad to study the effect of the amino acid polyamine and the growth regulator salicylic acid and their interactions on 7 traits under salt stress. Reflecting the total of quantitative and yield traits of Chili pepper (salt sensitive) Capsicum annuum L. Var. Anaheim TMR23 (from Biostim protection, Bakker Brothers, China). The experiment included three factors with three replications. The first factor included three levels (P0, P1, P2) (0, 2, 3 mg.l -1 polyamine), the second factor includes three levels (A0, A1, A2) (0, 75, 150 mg.l -1 salicylic acid) Likewise, the third factor included three levels of sodium chloride (S0, S1, S2) (0, 2000, 4000 PPM). The results of the experiment showed that different levels of salinity had a negative effect on the quantitative characteristics of chilli pepper plants, and it was noted that the second concentration of polyamine P2 and salicylic acid A2 were superior in reducing salinity. All values in many of the properties studied when interacting between polyamines and salicylic acid, it was observed that the highest value was P2A2 for the same properties studied when compared to the control, except for proline. While the ternary interaction P2A2S0 gave the highest value compared to the rest of the studied traits. It is clear from the results that proline had the highest value for all characteristics, In conclusion, this result indicates that the addition of polyamines and salicylic acid and their interactions effectively reduce the harmful effect of salt stress in chili pepper.
Subhi et al. (Mon,) studied this question.