Research progress of interaction effects of enhanced UV-B radiation and nitrogen on growth and metabolism of plants.

Under the conditions of different nitrogen sources,enhanced UV-B radiation can change the absorption and utilization of nitrogen,C/H ratio and C/N ratio and increase the biosynthesis of amino acids.Lacking of nitrogen,enhanced UV-B radiation can make the activities of SOD,POD enhanced and the content of MDA increased in plant leaves.With excessive nitrogen,enhanced UV-B radiation will reduce the endurance of plants to UV-B radiation.The interaction of enhanced UV-B radiation and the lack of nitrogen can reduce photosynthetic rate and contents of chlorophyll,soluble sugar and starch of plant leaves,thus inhabiting the growth and reducing the biomass of plants.In this paper,interaction effects of enhanced UV-B radiation and nitrogen on the antioxidant system of plants,nitrogen metabolism,photosynthesis,biomass and morphology of plants at home and abroad in recent years were reviewed.