Salinity affects the photoacclimation of Chlamydomonas raudensis Ettl UWO241.

Photosynthesis Research
Kenji TakizawaJun Minagawa

Abstract

Chlamydomonas raudensis Ettl UWO241, a natural variant of C. raudensis, is deficient in state transitions. Its habitat, the deepest layer of Lake Bonney in Antarctica, features low irradiance, low temperature, and high salinity. Although psychrophily and low-light acclimation of this green alga has been described, very little information is available on the effect of salinity. Here, we demonstrate that this psychrophile is halotolerant, not halophilic, and it shows energy redistribution between photosystem I and II based on energy spillover under low-salt conditions. Furthermore, we revealed that C. raudensis exhibits higher non-photochemical quenching in comparison with the mesophile Chlamydomonas reinhardtii, when grown with low-salt, which is due to the lower proton conductivity across the thylakoid membrane. Significance of the C. raudensis UWO241 traits found in the low salinity culture are implicated with their natural habitats, including the high salinity and extremely stable light environments.

References

Aug 23, 2002·Proceedings of the National Academy of Sciences of the United States of America·Atsuko Kanazawa, David M Kramer
Apr 6, 2004·Proceedings of the National Academy of Sciences of the United States of America·Thomas J AvensonDavid M Kramer
Nov 10, 2004·Journal of Experimental Botany·Jeffrey A CruzDavid M Kramer
Oct 18, 2005·Photosynthesis Research·David M KramerGerald E Edwards
Jan 13, 2006·Proceedings of the National Academy of Sciences of the United States of America·Hiroko TakahashiJun Minagawa
Mar 10, 2006·Microbiology and Molecular Biology Reviews : MMBR·Rachael M Morgan-KissNorman P A Huner
Jan 1, 1960·Proceedings of the National Academy of Sciences of the United States of America·N Sueoka

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Citations

Aug 2, 2013·Extremophiles : Life Under Extreme Conditions·Jenna M DolhiRachael M Morgan-Kiss
Nov 3, 2010·Journal of Experimental Botany·Tessa PocockStefan Falk
May 11, 2016·Extremophiles : Life Under Extreme Conditions·Chenlin LiuChengjun Sun

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