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https://hdl.handle.net/2440/50570
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DC Field | Value | Language |
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dc.contributor.author | Christophersen, H. | - |
dc.contributor.author | Smith, S. | - |
dc.contributor.author | Pope, S. | - |
dc.contributor.author | Smith, F. | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Environment International, 2009; 35(3):485-490 | - |
dc.identifier.issn | 0160-4120 | - |
dc.identifier.issn | 1873-6750 | - |
dc.identifier.uri | http://hdl.handle.net/2440/50570 | - |
dc.description.abstract | We investigated the effects of phosphorus (P) supply on the uptake and toxicity of arsenate (As(V)) in two plant species (Medicago truncatula and Hordeum vulgare) grown in soil/sand mixes. Our initial hypothesis was that competition between phosphate (Pi) and As(V) for uptake would be observed, and that this would be the basis for the 'protective' effect of P with respect to As toxicity, as shown in solution culture. Addition of P to the soil/sand mixes did not have major effects on water extractable As, or vice versa. We observed that toxic effects of As(V) on plant growth were ameliorated by increased P in both plant species. However, we found no evidence that increased P supply reduced specific uptake of As(V) on a molar basis, so that competition with Pi could not be the basis for the effect. A more complex mechanism of protection is indicated which might relate to different Pi transport systems being expressed at different P levels. | - |
dc.description.statementofresponsibility | H.M. Christophersen, S.E. Smith, S. Pope, F.A. Smith | - |
dc.language.iso | en | - |
dc.publisher | Pergamon-Elsevier Science Ltd | - |
dc.source.uri | http://dx.doi.org/10.1016/j.envint.2008.07.011 | - |
dc.subject | Arsenic | - |
dc.subject | Arsenate (As(V)) uptake | - |
dc.subject | Phosphorus | - |
dc.subject | Toxicity | - |
dc.title | No evidence for competition between arsenate and phosphate for uptake from soil by medic or barley | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1016/j.envint.2008.07.011 | - |
dc.relation.grant | ARC | - |
pubs.publication-status | Published | - |
Appears in Collections: | Aurora harvest Earth and Environmental Sciences publications |
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