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Washington University in St. Louis
Circadian clock, Cyanobacteria, phosphatase, Photosynthesis, RNA sequencing, Stress tolerance
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Full-Text Articles in Microbiology
Mechanisms For High Light Tolerance In A Fast-Growing Cyanobacterium, Patricia Walker
Mechanisms For High Light Tolerance In A Fast-Growing Cyanobacterium, Patricia Walker
Arts & Sciences Electronic Theses and Dissertations
Through oxygenic photosynthesis, cyanobacteria, algae, and plants convert light into chemical energy. However, highly energetic light often damages the photosynthetic apparatus, which can lead to the decline of photosynthetic activity (photoinhibition), and prolonged photoinhibition can lead to cell death. Cyanobacteria enact various protective mechanisms to mitigate photodamage, many of which have been conserved in plants. Repair of PSII reaction centers, decreased light absorption, quenching of excess absorbed energy, and biosynthesis of antioxidants all work to mitigate damage during high light. Due to the adjustments to photosynthesis, acclimation to high light requires remodeling of cellular metabolism and physiology. Therefore, phototrophs have …