AI Article Synopsis
- Cyanobacterial strains grow best within a specific temperature range that aligns with their natural environment, but the molecular details of this range are not well understood.
- A study found that a mutant strain of Synechococcus elongatus PCC 7942, which lacks the circadian rhythm regulator RpaA, showed an increased preferable temperature range for growth.
- RpaA appears to regulate electron transport processes, and its absence may lead to increased hydrogen peroxide production at high temperatures, influencing the temperature tolerance in these cyanobacteria.*
Article Abstract
Cyanobacterial strains can grow within a specific temperature range that approximately corresponds to their natural habitat. However, how the preferable temperature range for growth (PTRG) is determined at the molecular level remains unclear. In this study, we detected a PTRG upshift in a mutant strain of Synechococcus elongatus PCC 7942 lacking the circadian rhythm regulator RpaA. Subsequent analyses revealed that RpaA decreases the electron transport from photosystem I to NADPH. The change in electron transport likely inhibits H O generation under high-temperature conditions and contributes to the observed PTRG upshift in rpaA-deficient cells. The importance of the effects of the circadian rhythm regulator on the PTRG is discussed.
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| http://dx.doi.org/10.1002/1873-3468.14075 | DOI Listing |
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