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lüll Bacterial responses to photo-oxidative stress Ziegelhoffer EC; Donohue TJNat Rev Microbiol 2009[Dec]; 7 (12): 856-63Singlet oxygen is one of several reactive oxygen species that can destroy biomolecules, microorganisms and other cells. Traditionally, the response to singlet oxygen has been termed photo-oxidative stress, as light-dependent processes in photosynthetic cells are major biological sources of singlet oxygen. Recent work identifying a core set of singlet oxygen stress response genes across various bacterial species highlights the importance of this response for survival by both photosynthetic and non-photosynthetic cells. Here, we review how bacterial cells mount a transcriptional response to photo-oxidative stress in the context of what is known about bacterial stress responses to other reactive oxygen species.|*Light[MESH]|Antioxidants/pharmacology[MESH]|Bacteria/genetics/metabolism[MESH]|DNA Damage[MESH]|DNA, Bacterial[MESH]|Gene Expression Regulation[MESH]|Oligonucleotide Array Sequence Analysis[MESH]|Oxidative Stress/*physiology[MESH]|Oxygen/*chemistry/metabolism[MESH]|Photochemistry[MESH]|Photosynthesis/physiology[MESH]|RNA, Bacterial/*metabolism[MESH]|Reactive Oxygen Species/*metabolism[MESH] |