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http://hdl.handle.net/1942/15496
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DC Field | Value | Language |
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dc.contributor.author | SAENEN, Eline | - |
dc.contributor.author | HOREMANS, Nele | - |
dc.contributor.author | VANHOUDT, Nathalie | - |
dc.contributor.author | VANDENHOVE, Hildegarde | - |
dc.contributor.author | BIERMANS, Geert | - |
dc.contributor.author | Van Hees, May | - |
dc.contributor.author | Wannijn, Jean | - |
dc.contributor.author | VANGRONSVELD, Jaco | - |
dc.contributor.author | CUYPERS, Ann | - |
dc.date.accessioned | 2013-09-18T13:59:23Z | - |
dc.date.available | 2013-09-18T13:59:23Z | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 32 (9), p. 2125-2133 | - |
dc.identifier.issn | 0730-7268 | - |
dc.identifier.uri | http://hdl.handle.net/1942/15496 | - |
dc.description.abstract | Uranium (U) causes oxidative stress in Arabidopsis thaliana plants grown at pH 5.5. However, U speciation and its toxicity strongly depend on environmental parameters, for example pH. It is unknown how different U species determine U uptake and translocation within plants and how they might affect the oxidative defense mechanisms of these plants. The present study analyzed U uptake and oxidative stress-related responses in A. thaliana (Columbia ecotype) under contrasted U chemical speciation conditions. The 18-d-old seedlings were exposed for 3 d to 25 µM U in a nutrient solution of which the pH was adjusted to 4.5, 5.5, 6.5, or 7.5. Results indicate that there is a different rate of U uptake and translocation at the different pHs, with high uptake and low translocation at low pH and lower uptake but higher translocation at high pH. After U exposure, an increased glutathione reductase activity and total glutathione concentration were observed in U-exposed roots, pointing toward an important role for glutathione in the root defense system against U either by chelation or by antioxidative defense mechanisms. In leaves, antioxidative defense mechanisms were activated on U exposure, indicated by increased superoxide dismutase and catalase activity. As it seems that U toxicity is influenced by pH, it is important to consider site-specific characteristics when making U risk assessments. Environ Toxicol Chem 2013;32:2125–2133. © 2013 SETAC | - |
dc.description.sponsorship | This work was supported by a PhD grant for E. Saenenfrom the Belgian Nuclear Research Centre (SCK•CEN). | - |
dc.language.iso | en | - |
dc.rights | (C) 2013 SETAC | - |
dc.subject.other | uranium; arabidopsis thaliana; oxidative stress; pH | - |
dc.title | Effects of pH on uranium uptake and oxidative stress responses induced in Arabidopsis thaliana | - |
dc.type | Journal Contribution | - |
dc.identifier.epage | 2133 | - |
dc.identifier.issue | 9 | - |
dc.identifier.spage | 2125 | - |
dc.identifier.volume | 32 | - |
local.bibliographicCitation.jcat | A1 | - |
local.type.refereed | Refereed | - |
local.type.specified | Article | - |
dc.identifier.doi | 10.1002/etc.2290 | - |
dc.identifier.isi | 000322253800024 | - |
item.contributor | SAENEN, Eline | - |
item.contributor | HOREMANS, Nele | - |
item.contributor | VANHOUDT, Nathalie | - |
item.contributor | VANDENHOVE, Hildegarde | - |
item.contributor | BIERMANS, Geert | - |
item.contributor | Van Hees, May | - |
item.contributor | Wannijn, Jean | - |
item.contributor | VANGRONSVELD, Jaco | - |
item.contributor | CUYPERS, Ann | - |
item.validation | ecoom 2014 | - |
item.fulltext | With Fulltext | - |
item.accessRights | Restricted Access | - |
item.fullcitation | SAENEN, Eline; HOREMANS, Nele; VANHOUDT, Nathalie; VANDENHOVE, Hildegarde; BIERMANS, Geert; Van Hees, May; Wannijn, Jean; VANGRONSVELD, Jaco & CUYPERS, Ann (2013) Effects of pH on uranium uptake and oxidative stress responses induced in Arabidopsis thaliana. In: ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY, 32 (9), p. 2125-2133. | - |
crisitem.journal.issn | 0730-7268 | - |
crisitem.journal.eissn | 1552-8618 | - |
Appears in Collections: | Research publications |
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File | Description | Size | Format | |
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Saenen_et_al-2013-Environmental_Toxicology_and_Chemistry.pdf Restricted Access | Published version | 274.41 kB | Adobe PDF | View/Open Request a copy |
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