Fig. 5

UV-C stress enhances Chlamydomonas tolerance to rose Bengal (RB)-induced singlet oxygen stress. Unstressed Chlamydomonas cultures were unable to grow after their exposure to 2 μM RB. Culture samples from the t 5 h harvest had an increased tolerance to RB-induced oxidative stress with no differences in growth between untreated and 2 μM RB-treated conditions. Tolerance to RB-induced singlet oxygen stress was reduced in culture samples from the t 24 h as the RB-treated samples grow less than the untreated ones