Unraveling uranium induced oxidative stress related responses in Arabidopsis thaliana seedlings. Part I: responses in the roots

Vanhoudt, Nathalie; Vandenhove, Hildegarde; Horemans, Nele; Remans, Tony; Opdenakker, Kelly; Smeets, Karen; Martinez‐Bello, Daniel; Wannijn, Jean; Hees, May Van; Vangronsveld, Jaco; Cuypers, Ann

doi:10.1016/j.jenvrad.2011.03.015

Cited by 40 publications

(30 citation statements)

References 32 publications

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“…Increased root weight of U-treated plants has been observed previously in studies with A. thaliana exposed to 25 mM U (Saenen et al, 2013). However, higher concentrations of U have been shown to inhibit root growth in A. thaliana plants (Vanhoudt et al, 2014(Vanhoudt et al, , 2011c. This differential effect of U to the roots is probably related to differences in the applied U concentrations.…”

Section: Resultsmentioning

confidence: 52%

“…An accumulation of H 2 O 2 in the leaves of maize plants exposed to different heavy metals such as Cd (Kumar et al, 2008a), Cu Tewari et al, 2008a), Fe and Ni (Kumar et al, 2007) has already been reported. Higher H 2 O 2 accumulation in U-exposed roots and leaves may be associated with the increases in expression of RBOH-C,RBOH-D, and FSD1 (Vanhoudt et al, 2011c).…”

Section: Uranium Exposure Induces H 2 O 2 Generationmentioning

confidence: 96%

“…Due to industrial activities like U-mining and milling, the phosphate industry and the application of this heavy metal in nuclear energy production, there exists a risk of leakage of uranium into the terrestrial and aquatic environment. Uranium exposure adversely affects plant growth, leads to an altered photosynthesis efficiency and induces oxidative damage as evident by increased lipid peroxidation in Arabidopsis thaliana (Saenen et al, 2013;Vandenhove et al, 2006;Vanhoudt et al, 2011cVanhoudt et al, , 2008.…”

Section: Introductionmentioning

confidence: 99%

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Uranium exposure induces nitric oxide and hydrogen peroxide generation in Arabidopsis thaliana

Tewari

Horemans

Nauts

et al. 2015

Environmental and Experimental Botany

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Section: Resultsmentioning

confidence: 52%

Section: Uranium Exposure Induces H 2 O 2 Generationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Uranium exposure induces nitric oxide and hydrogen peroxide generation in Arabidopsis thaliana

Tewari

Horemans

Nauts

et al. 2015

Environmental and Experimental Botany

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“…Uranium was added as UO 2 (NO 3 ) 2 .6H 2 O (Sigma) to a modified Hoagland solution and the pH was adjusted to AE 5.5 with NaOH. Further details are given in Part I of this study (Vanhoudt et al, 2011).…”

Section: Plant Culture and Uranium Exposurementioning

confidence: 99%

“…Subsequently, antioxidant metabolite concentrations were determined to evaluate their contribution under uranium stress. While in Part I of this study oxidative stress related responses in the roots were discussed (Vanhoudt et al, 2011), this Part II will discuss oxidative stress related responses in the leaves and general conclusions will be drawn based on the results from the roots and the leaves.…”

Section: Introductionmentioning

confidence: 99%

Unraveling uranium induced oxidative stress related responses in Arabidopsis thaliana seedlings. Part II: responses in the leaves and general conclusions

Vanhoudt

Cuypers

Horemans

et al. 2011

Journal of Environmental Radioactivity

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Effects of pH on uranium uptake and oxidative stress responses induced in Arabidopsis thaliana

Saenen

Horemans

Vanhoudt

et al. 2013

Enviro Toxic and Chemistry

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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.

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Unraveling uranium induced oxidative stress related responses in Arabidopsis thaliana seedlings. Part I: responses in the roots

Cited by 40 publications

References 32 publications

Uranium exposure induces nitric oxide and hydrogen peroxide generation in Arabidopsis thaliana

Uranium exposure induces nitric oxide and hydrogen peroxide generation in Arabidopsis thaliana

Unraveling uranium induced oxidative stress related responses in Arabidopsis thaliana seedlings. Part II: responses in the leaves and general conclusions

Effects of pH on uranium uptake and oxidative stress responses induced in Arabidopsis thaliana

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