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https://hdl.handle.net/2440/93740
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dc.contributor.author | Bose, J. | - |
dc.contributor.author | Babourina, O. | - |
dc.contributor.author | Shabala, S. | - |
dc.contributor.author | Rengel, Z. | - |
dc.date.issued | 2013 | - |
dc.identifier.citation | Plant and Cell Physiology, 2013; 54(7):1093-1104 | - |
dc.identifier.issn | 0032-0781 | - |
dc.identifier.issn | 1471-9053 | - |
dc.identifier.uri | http://hdl.handle.net/2440/93740 | - |
dc.description.abstract | Low-pH stress and Al3+ toxicity affect root growth in acid soils. It was hypothesized that the capacity of genotypes to maintain Mg2+ uptake in acidic environments may contribute to low-pH and Al resistance, but explicit evidence is lacking. In this work, an Al-resistant alr104 mutant and two Al-sensitive mutants (als5 and als3) of Arabidopsis thaliana were compared with the wild type (Col-0) for Mg2+ uptake and intracellular Mg2+ concentration under low-pH and combined low-pH/Al stresses. Magnesium accumulation in roots was measured in long-term (7 d) experiments. The Mg2+ fluxes were measured using ion-sensitive microelectrodes at the distal elongation and the mature root zones in short-term (0–60 min) experiments. Intracellular Mg2+ concentrations were measured in intact root cells at the distal elongation zone using magnesium-specific fluorescent dye and fluorescent lifetime imaging (FLIM) analysis. Under low-pH stress, Arabidopsis mutants als5 and alr104 maintained a higher Mg concentration in roots, and had greater Mg2+ influx than the wild type and the als3 mutant. Under combined low-pH/Al treatment, Al-resistant genotypes (wild type and alr104) maintained a higher Mg2+ accumulation, and had a higher Mg2+ influx and higher intracellular Mg2+ concentration than Al-sensitive genotypes (als3 and als5). Overall, these results show that increased Mg2+ uptake correlates with an enhanced capacity of Arabidopsis genotypes to cope with low-pH and combined low-pH/Al stresses. | - |
dc.description.statementofresponsibility | Jayakumar Bose, Olga Babourina, Sergey Shabala, and Zed Rengel | - |
dc.language.iso | en | - |
dc.publisher | Oxford University Press | - |
dc.rights | ©The Author 2013 | - |
dc.source.uri | http://dx.doi.org/10.1093/pcp/pct064 | - |
dc.subject | Aluminum toxicity | - |
dc.subject | Arabidopsis thaliana | - |
dc.subject | Intracellular magnesium | - |
dc.subject | Low pH | - |
dc.subject | Magnesium flux | - |
dc.title | Low-pH and aluminum resistance in Arabidopsis correlates with high cytosolic magnesium content and increased magnesium uptake by plant roots | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1093/pcp/pct064 | - |
dc.relation.grant | ARC | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Bose, J. [0000-0002-0565-2951] | - |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 2 |
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