How purple bacteria protect themselves against fotooxidative stress?

Šlouf V., Chábera P., Olsen J. D., Martin E. C., Qian P., Hunter C. N., Polívka T. (2012) Photoprotection in a purple phototrophic bacterium mediated by oxygen-dependent alteration of carotenoid excited-state properties. Published online: www.pnas.org/cgi/doi/10.1073/pnas.1201413109.