The use of ultraviolet radiation as a way to improve the efficiency of physiological and biochemical processes to produce optimal yield in drought stress conditions

In arid regions, water scarcity is one of the main factors limiting production of crops, so that in these areas, the available water is very low for cultivation. Therefore, in addition to water management, it has to overcome dryness with a series of methods and produce crops. Despite the fact that heavy doses of ultraviolet radiation on plants and animals has harmful effects, but mild doses of ultraviolet radiation are a good way to reduce the sensitivity of the plant to environmental stresses, including drought. So that by applying mild doses of UV-A and UV-B rays, defense mechanisms such as enzymes and non-enzymes increase relative to the control (without ultraviolet radiation) and it improves the physiological traits. On the other hand, it has a positive effect on the qualitative and quantitative characteristics of the product. Despite the fact that in most cases, drought stress and ultraviolet radiation alone have adverse effects on the plant, the interaction of the two factors causes the plant to develop defense mechanisms. As a result, the damage caused by subsequent stress (such as dryness) on the plant was reduced by ultraviolet radiation.