Fig. 2From: External spermine prevents UVA-induced damage of Synechocystis sp. PCC 6803 via increased catalase activity and decreased H2O2 and malonaldehyde levelsIntracellular polyamines of Synechocystis sp. PCC 6803 grown in BG11 medium with or without Spm supplementation under normal growth light (NL) and UVA radiation. Data represent mean ± S.D. (n = 3). The statistical difference of the results between with and without Spm supplementation is indicated by an asterisk at *P < 0.05. Insets in a and b show the ratio of Put/Spd content at 60-min treatmentBack to article page