摘要: This chapter addresses the impact of ambient and enhanced levels ultravioletB radiation (UV-B, 280–320 nm) on terrestrial vascular plants, with a focus findings published during past 5 years. It discusses some more recent ideas regarding plant responses to UV-B possible mechanisms involved. review is not meant be exhaustive, for additional topics readers are referred Caldwell Flint (1994), Bjorn (1996), et al. (1996, 1997), Lumdsen (1997), Rozema (1997a,b), (1998). The past, current, future environment plants briefly reviewed. Because difficulties in extrapolating from indoor studies field situations, I studies, particular reference those employing filter exclusions modulated supplements.