NDLI: The role of siderophores in iron acquisition by photosynthetic marine microorganisms

Content Provider	Springer Nature Link
Author	Hopkinson, Brian M. Morel, François M. M.
Copyright Year	2009
Abstract	The photosynthetic picocyanobacteria and eukaryotic microorganisms that inhabit the open ocean must be able to supply iron for their photosynthetic and respiratory needs from the subnanomolar concentrations available in seawater. Neither group appears to produce siderophores, although some coastal cyanobacteria do. This is interpreted as an adaptation to the dilute oceanic environment rather than a phylogenetic constraint, since there are cases in which related taxa from different environments have the capacity to produce siderophores. Most photosynthetic marine microorganisms are presumably, however, capable of accessing iron from strong chelates since the majority of dissolved iron in seawater is complexed by organic ligands, including siderophores. Rather than direct internalization of siderophores and other iron chelates, marine organisms primarily appear to use uptake pathways that involve a reduction step to free bound iron, closely coupled with transport into the cell.
Starting Page	659
Ending Page	669
Page Count	11
File Format	PDF
ISSN	09660844
Journal	BioMetals
Volume Number	22
Issue Number	4
e-ISSN	15728773
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-04-03
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Siderophores Phytoplankton Ocean Iron uptake Cyanobacteria Physical Chemistry Biochemistry
Content Type	Text
Resource Type	Article
Subject	Metals and Alloys Biochemistry, Genetics and Molecular Biology Biomaterials Agricultural and Biological Sciences

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