Fig. 6
Effects of ultraviolet-B (UVB) and photosynthetically active radiation (PAR) on the reactive oxygen species (ROS) levels in Ulva prolifera on the 1st day and the 4th day. SHAM-1d and SHAM-4d show the changes of the SHAM group on the 1st day and the 4.th day, respectively. A \({{\text{O}}}_{2}^{\bullet -}\) levels; B H2O2 levels; C \(\bullet {\text{OH}}\) levels. All data are the mean values (± SD) from three biological replicates. Groups with different lowercase letters are significantly different (P < 0.05)