Articles | Volume 17, issue 9
https://doi.org/10.5194/bg-17-2537-2020
https://doi.org/10.5194/bg-17-2537-2020
Research article
 | 
12 May 2020
Research article |  | 12 May 2020

Co-occurrence of Fe and P stress in natural populations of the marine diazotroph Trichodesmium

Noelle A. Held, Eric A. Webb, Matthew M. McIlvin, David A. Hutchins, Natalie R. Cohen, Dawn M. Moran, Korinna Kunde, Maeve C. Lohan, Claire Mahaffey, E. Malcolm S. Woodward, and Mak A. Saito

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Cited articles

Basu, S. and Shaked, Y.: Mineral iron utilization by natural and cultured Trichodesmium and associated bacteria, Limnol. Oceanogr., 63, 2307–2320, https://doi.org/10.1002/lno.10939, 2018. 
Basu, S., Gledhill, M., de Beer, D., Matondkar, S. G. P., and Shaked, Y.: Colonies of marine cyanobacteria Trichodesmium interact with associated bacteria to acquire iron from dust, Communications Biology, 2, 1–8, https://doi.org/10.1038/s42003-019-0534-z, 2019. 
Bergman, B., Sandh, G., Lin, S., Larsson, J., and Carpenter, E. J.: Trichodesmium – a widespread marine cyanobacterium with unusual nitrogen fixation properties, FEMS Microbiol. Rev., 37, 286–302, https://doi.org/10.1111/j.1574-6976.2012.00352.x, 2013. 
Berman-Frank, I., Cullen, J. T., Shaked, Y., Sherrell, R. M., and Falkowski, P. G.: Iron availability, cellular iron quotas, and nitrogen fixation in Trichodesmium, Limnol. Oceanogr., 46, 1249–1260, https://doi.org/10.4319/lo.2001.46.6.1249, 2001. 
Capone, D. G., Zehr, J. P., Paerl, H. W., Bergman, B., and Carpenter, E. J.: Trichodesmium, a globally significant marine cyanobacterium, Science, 276, 1221–1229, https://doi.org/10.1126/science.276.5316.1221, 1997. 
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Short summary
Trichodesmium is a globally important marine nitrogen fixer that stimulates primary production in the surface ocean. We surveyed metaproteomes of Trichodesmium populations across the North Atlantic and other oceans, and we found that they experience simultaneous phosphate and iron stress because of the biophysical limits of nutrient uptake. Importantly, nitrogenase was most abundant during co-stress, indicating the potential importance of this phenotype to global nitrogen and carbon cycling.
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