**3. Effect of salicylic acid in qualitative and medical qualities**

The significant phylogenetic effects reflected by the salicylic acid act towards the growth and development of the plant and the improvement of its health made it a popular vehicle for those interested in agricultural production. This has already been shown to improve the qualities of many plants that occupy a high economic position. It also activates the roles of many enzymes and also has an important action towards syphilis and the bio-synthesis of ethylene gas (the maturation hormone and aging) and the movement of stomata and contributes to plant metabolism and transfer of ions [16, 17].

Through research and studies on the effect of salicylic acid treatment on the specific qualities of plants, Gharib [18] noted that the spray of the basil plants *Ocimum basilicum* L. and the *Majorana hortensi* L. were planted in a 40 cm pot with three concentrations of salicylic acid [10<sup>−</sup><sup>3</sup> , 10<sup>−</sup><sup>4</sup> , 10<sup>−</sup><sup>5</sup> ] mole resulted in a significant increase in the ratio of the active ingredient of both plants compared to the comparison treatment. The spraying of two varieties of *Cymbopogon flexuous* L. with a concentration of 5–10 m of salicylic acid developing in the plants gave a significant increase in the specific qualities and active substances of plants and antioxidants compared to non-treated plants [19].

Khandaker et al. showed [20] that spray of red *Amaranthus tricolor* L. plants with three concentrations of salicylic acid (10<sup>−</sup><sup>3</sup> , 10<sup>−</sup><sup>4</sup> , and 10<sup>−</sup><sup>5</sup> mm) had the most significant effect on plant active compounds compared to untreated plants and significant increase in properties (total phenols, antioxidant, and plant pigments). Salicylic acid spraying with concentrations (25 and 50 mg/l) on the vegetative group of *Cumin cyminum L.* resulted in a significant increase in the percentage of plant pigments at a concentration of 50 mg/l compared to comparison plants [21].

The addition of salicylic acid with three concentrations (30, 60, and 90 mg/l) resulted in a significant increase in the production of some plant antioxidants from blackwheat leaves when treated with concentrations of 60 and 90 mg/l compared with non-treated plants [22].

Majoul showed [23] a significant increase in the percentage of nutrients P, N, and the leaf content of chlorophyll when spraying the okra plants were measured at two levels of salicylic acid (78 and 155 mg/l) and in two steps compared to the comparison treatment.

The medicinal seeds of the *Digitalis trojanaivanina* collected from the Turkish Aida mountains with three concentrations of salicylic acid resulted in significant superiority in the studied active substances (pigment content, total phenols, phenols, and flavonoids) compared to non-treated plants [24].

*Sustainable Crop Production*
