Response of purely symbiotic and NO3‐fed nodulated plants of Lupinus luteus and Vicia atropurpurea to ultraviolet‐B radiation

The effects of elevated UV‐B radiation on growth, symbiotic function and concentration of metabolites were assessed in purely symbiotic and NO3‐fed nodulated plants of Lupinus luteus and Vicia atropurpurea grown outdoors either on tables under supplemental UV‐B radiation or in chambers covered with different types of plexi‐glass to attenuate solar ultraviolet radiation. Moderately and highly elevated UV‐B exposures simulating 15% and 25% ozone depletion as well as sub‐ ambient UV‐B did not alter organ growth, plant total dry matter and N content per plant in both L. luteus and V. atropurpurea. In contrast, elevated UV‐B increased (P