Articles | Volume 14, issue 19
https://doi.org/10.5194/bg-14-4455-2017
https://doi.org/10.5194/bg-14-4455-2017
Research article
 | 
11 Oct 2017
Research article |  | 11 Oct 2017

Effects of ultraviolet radiation on photosynthetic performance and N2 fixation in Trichodesmium erythraeum IMS 101

Xiaoni Cai, David A. Hutchins, Feixue Fu, and Kunshan Gao

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Cited articles

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Cai, X., Gao, K., Fu, F., Campbell, D., Beardall, J., and Hutchins, D.: Electron transport kinetics in the diazotrophic cyanobacterium Trichodesmium spp. grown across a range of light levels, Photosyn. Res., 124, 45–56, https://doi.org/10.1007/s11120-015-0081-5, 2015.
Campbell, D., Eriksson, M. J., Oquist, G., Gustafsson, P., and Clarke, A. K.: The cyanobacterium Synechococcus resists UV-B by exchanging photosystem II reaction-center D1 proteins, P. Natl. Acad. Sci. USA, 95, 364–369, 1998.
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Short summary
Trichodesmium is significant marine N2 fixer. We conducted short- and long-term UV exposure experiment to investigate how UV affects this organism. Our results showed N2 fixation and carbon fixation rates were significantly reduced under UV radiation. As a defense strategy, Trichodesmium is able to synthesize UV-absorbing compounds to protect from UV damage. Our results suggest that shipboard experiments in UV-opaque containers may have substantially overestimated in situ N2 fixation rate.
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