The effects of UV radiation and rainfall reduction on the seasonal leaf phenolic content/composition and antioxidant
activity of theMediterranean shrub Arbutus unedowere studied. Naturally growing plants of A. unedo were
submitted to 97% UV-B reduction (UVA), 95% UV-A+UV-B reduction (UV0) or near-ambient UV levels (UVBA)
under two precipitation regimes (natural rainfall or 10–30% rainfall reduction).