“…The primary DNA lesions caused by UV-C light, MMS, and FdUrd are most likely repaired by several different enzymatic pathways in chloroplasts of C. reinhardtii (13,37,43,57). However, these genotoxic agents also induce secondary lesions, such as double-strand breaks, interstrand cross-links, and/or damage in single-stranded regions, that require recombination for their repair (7,18,25,37,43,44,58). In fact, recombinational repair in E. coli seems to overcome, at least partially, the damage induced by many different genotoxic compounds (7,18,58).…”