Publication:
Iron uptake by the ichthyotoxic Chattonella marina (Raphidophyceae): Impact of superoxide generation

dc.contributor.author Garg, Shikha en_US
dc.contributor.author Rose, Andrew en_US
dc.contributor.author Godrant, Aurelie en_US
dc.contributor.author Waite, T en_US
dc.date.accessioned 2021-11-25T14:14:42Z
dc.date.available 2021-11-25T14:14:42Z
dc.date.issued 2007 en_US
dc.description.abstract Significant production of superoxide, a known reductant of both inorganic and organically complexed iron(III), occurs in natural systems by both biotic and abiotic pathways. We have investigated the generation of superoxide by Chattonella marina (Subrahman.) Y. Hara et Chihara, a phytoplankton taxon known to produce high levels of this reactive oxygen species, and examined the role of superoxide in the acquisition of iron by this organism. Additionally, a generalized model for iron acquisition by C. marina has been developed, which includes three pathways of iron acquisition from organically complexed iron(III): nondissociative reductive uptake, dissociative reductive uptake, and nonreductive dissociative uptake. The model is shown to be particularly useful in ascertaining the relative importance of these various iron-uptake pathways as a function of solution parameters including concentration and iron-binding strength of the organic ligand and superoxide concentration. Our results suggest that superoxide can participate in the C. marina iron-uptake process when iron is complexed to weak ligands, such as citrate, but plays only a minor role when iron is bound to a strong ligand. It thus appears that facilitation of iron acquisition is not the sole purpose of superoxide production by these organisms. en_US
dc.identifier.issn 0022-3646 en_US
dc.identifier.uri http://hdl.handle.net/1959.4/42281
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/au/ en_US
dc.source Legacy MARC en_US
dc.subject.other Chattonella marina en_US
dc.subject.other iron uptake en_US
dc.subject.other organically complexed iron en_US
dc.subject.other reduction en_US
dc.subject.other reduction en_US
dc.subject.other reduction en_US
dc.title Iron uptake by the ichthyotoxic Chattonella marina (Raphidophyceae): Impact of superoxide generation en_US
dc.type Journal Article en
dcterms.accessRights metadata only access
dspace.entity.type Publication en_US
unsw.accessRights.uri http://purl.org/coar/access_right/c_14cb
unsw.relation.faculty Engineering
unsw.relation.ispartofissue 5 en_US
unsw.relation.ispartofjournal Journal of Phycology en_US
unsw.relation.ispartofpagefrompageto 978-991 en_US
unsw.relation.ispartofvolume 43 en_US
unsw.relation.originalPublicationAffiliation Garg, Shikha, Civil & Environmental Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Rose, Andrew, Civil & Environmental Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Godrant, Aurelie, Civil & Environmental Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.originalPublicationAffiliation Waite, T, Civil & Environmental Engineering, Faculty of Engineering, UNSW en_US
unsw.relation.school School of Civil and Environmental Engineering *
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