Ultraviolet (UV) light has among the shortest wavelengths in the light spectrum. Although the sun radiates ultraviolet light, most of it is screened by the stratospheric ozone layer so it does not affect plant growth.UV light can alter the composition of materials and conditions needed for photosynthesis, the process plants used to grow.
Crops
Scientists have been testing the effects of ultraviolet-B radiation on crops for decades due to concerns about the depletion of the ozone layer. Although the effects vary among plant species and cultivars, most plants are negatively affected to some degree.
UV-Resistant Plants
Scientists are addressing concerns about potential crop losses by trying to develop plants that are resistant to damage from ultraviolet light.
Limiting the Effects
According to plant scientists Alan Teramura and Joe Sullivan of Columbia University, plants which are not stressed by lack of water or nutrients are better able to withstand exposure to ultraviolet light
