Acquisition of iron bound to strong organic complexes, with different Fe binding groups and photochemical reactivities, by plankton communities in Fe-limited subantarctic waters
作者： Maria T. Maldonado , Robert F. Strzepek , Sylvia Sander , Philip W. Boyd
DOI: 10.1029/2005GB002481
关键词: Iron acquisition 、 Iron uptake 、 Chemistry 、 Dissociation (chemistry) 、 Photochemistry 、 Plankton 、 Ligand 、 Bioavailability 、 In situ
摘要: [1] Though it is clear that plankton in oceanic regions access iron bound to strong organic ligands, the mechanism mediating release of from these complexes remains unresolved. In this study, we aim elucidate mechanisms acquisition by subantarctic waters. particular, investigated importance photochemistry reductive dissociation complexes, using naturally occurring and model with different iron-binding groups photoreactivities. Our results demonstrate within ligands available for uptake growth indigenous plankton, but photolability does not determine bioavailability. contrast, light significantly enhances situ suggesting are photolabile, surface waters may play a significant role dissolved pool plankton.
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Hakim Boukhalfa, Alvin L. Crumbliss, Chemical aspects of siderophore mediated iron transport. Biometals. ,vol. 15, pp. 325- 339 ,(2002) , 10.1023/A:1020218608266
G Müller, K N Raymond, Specificity and mechanism of ferrioxamine-mediated iron transport in Streptomyces pilosus. Journal of Bacteriology. ,vol. 160, pp. 304- 312 ,(1984) , 10.1128/JB.160.1.304-312.1984
Philip Boyd, Julie LaRoche, Mark Gall, Russell Frew, R. Michael L. McKay, Role of iron, light, and silicate in controlling algal biomass in subantarctic waters SE of New Zealand Journal of Geophysical Research. ,vol. 104, pp. 13395- 13408 ,(1999) , 10.1029/1999JC900009
Jingfeng Wu, George W. Luther, Complexation of Fe(III) by natural organic ligands in the Northwest Atlantic Ocean by a competitive ligand equilibration method and a kinetic approach Marine Chemistry. ,vol. 50, pp. 159- 177 ,(1995) , 10.1016/0304-4203(95)00033-N
Martha Gledhill, Constant M.G. van den Berg, Determination of complexation of iron(III) with natural organic complexing ligands in seawater using cathodic stripping voltammetry Marine Chemistry. ,vol. 47, pp. 41- 54 ,(1994) , 10.1016/0304-4203(94)90012-4
E. A. Webb, J. W. Moffett, J. B. Waterbury, Iron Stress in Open-Ocean Cyanobacteria (Synechococcus, Trichodesmium, andCrocosphaera spp.): Identification of the IdiA Protein Applied and Environmental Microbiology. ,vol. 67, pp. 5444- 5452 ,(2001) , 10.1128/AEM.67.12.5444-5452.2001
W.K.W. Li, P.M. Dickie, B.D. Irwin, A.M. Wood, Biomass of bacteria, cyanobacteria, prochlorophytes and photosynthetic eukaryotes in the Sargasso Sea Deep Sea Research. ,vol. 39, pp. 501- 519 ,(1992) , 10.1016/0198-0149(92)90085-8
Philippe D. Tortell, Maria T. Maldonado, Nell M. Price, The role of heterotrophic bacteria in iron-limited ocean ecosystems Nature. ,vol. 383, pp. 330- 332 ,(1996) , 10.1038/383330A0
William G. Sunda, Susan A. Huntsman, Iron uptake and growth limitation in oceanic and coastal phytoplankton Marine Chemistry. ,vol. 50, pp. 189- 206 ,(1995) , 10.1016/0304-4203(95)00035-P
Curtis L. Atkin, J. B. Neilands, Rhodotorulic acid, a diketopiperazine dihydroxamic acid with growth-factor activity. I. Isolation and characterization. Biochemistry. ,vol. 7, pp. 3734- 3739 ,(1968) , 10.1021/BI00850A054