Enhancement of root growth and nitrogen fixation in Trigonella by UV-exclusion from solar radiation

► Exclusion of solar UV-B and UV-A + B enhanced root biomass and nodulation in Trigonella foenum-graecum. ► By exclusion of solar UV nitrogenase activity in the nodules was significantly enhanced. ► Elimination of UV components from sunlight is beneficial to agriculture in terms of nitrogen fixation.