Thallium-induced oxalate secretion from rice (Oryza sativa L.) root contributes to the reduction of Tl(III) to Tl(I)

Zhang, Fuyi; Wang, Moyun; Liu, Fang; Liu, Wenfeng; Li, Xiuwuan; Qin, Dongdong; Geng, Xin; Huang, Xiao; Zhang, Ping

doi:10.1016/j.envexpbot.2018.07.028

Cited by 17 publications

(5 citation statements)

References 48 publications

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“…This is probably because the large amount of organic acids secreted by pine roots can react with H + and metal ions activated by SAR to alleviate the injury caused by SAR to plants. In addition, root organic acids can regulate the availability of soil nutrients which are difficult to use, making them easy to be absorbed and utilized by plants 39 . Hence, the increase of root organic acids secretion induced by acid stress is a physiological defense mechanism of plants to against adversity.…”

Section: Discussionmentioning

confidence: 99%

Acid resistance of Masson pine (Pinus massoniana Lamb.) families and their root morphology and physiological response to simulated acid deposition

Zhou

Zhang

Chen

et al. 2020

Sci Rep

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Pinus massoniana Lamb. is one of the most sensitive species to acid deposition among forest woody plants, but differences in acid resistance among pine families still exist. It is of great significance to study the differences in acid resistance of Masson pine families and to analyze the physiological regulation mechanism of their acid resistance. In this study, the 100-day-old seedlings of 16 Masson pine families were treated with the simulated acid rain (SAR) at different pH levels (5.6, 4.5, 3.5 and 2.5) for 100 days to investigate the plant morphology, chlorophyll content, and root physiological responses. Results showed that pine family No. 35 maintained the good morphology, high chlorophyll content and organic acids secretion, and low plasma membrane permeability exposed to SAR, while family No. 79 presented the opposite. SAR not only increased the root plasma membrane permeability, but also induced an exudation of organic acids from the pine roots, and the test parameters changed sharply when the SAR pH was lower than 4.5. The results indicated that Masson pine could resist to acidic environment (pH 4.5–5.6), and family No. 35 had the acid resistance while the family No. 79 was sensitive to acid stress. The acid resistance diversity of different pine families had close relation with the root physiological processes, including the root plasma membrane permeability and organic acids secretion. For the future research, the natural genetic variation of Masson pine in response to acid stress and its acid resistance mechanism should be further studied.

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Section: Discussionmentioning

confidence: 99%

Acid resistance of Masson pine (Pinus massoniana Lamb.) families and their root morphology and physiological response to simulated acid deposition

Zhou

Zhang

Chen

et al. 2020

Sci Rep

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“…The chemical properties of Tl(I) and Tl(III) are similar to those of potassium (K) and Al, respectively [29]. Tl(I) behaves similarly to K in vivo and competes with K in cell membranes and mitochondria in K-rich organs, such as nerves, liver, and myocardium, at a concentration 1/10 that of K; it also exerts toxic effects by interfering with K-dependent cellular processes [3]. A previous study speculated that Tl(I), similar to K, rapidly influxes into cells due to the actions of sodium-potassium pumps [29], and thus exhibits GT1-7 cytotoxicity relatively early.…”

Section: Discussionmentioning

confidence: 95%

“…In Japan, Tl sulphate, Tl acetate, and Tl nitrate are designated as deleterious substances under the Poisonous and Deleterious Substances Control Law. Tl can be a monovalent (Tl(I)) or trivalent ion (Tl(III)); Tl(I) is preferred in aqueous solutions, whereas Tl(III) is more stable in organic compounds and in oxidised water [3,4]. Tl(I) is used in scintillation counters for measuring radiation and rodenticides.…”

Section: Introductionmentioning

confidence: 99%

Toxic Effects of Two Redox States of Thallium on Immortalised Hypothalamic GT1-7 Neuronal Cells

Mizuno

Kawahara

Konoha-Mizuno

et al. 2023

IJMS

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Thallium (Tl), is a highly toxic heavy metal that exists in monovalent (Tl(I)) and trivalent (Tl(III)) ionic states. This study aimed to compare the toxicities of Tl(I) and Tl(III) in a mouse hypothalamic GT1-7 neuronal cell line. Decreased viability and increased cytotoxicity were observed in the GT1-7 cells 16 h after Tl(I) or Tl(III) treatment. Tl(III) was more cytotoxic, than Tl(I), as indicated by extracellular lactate dehydrogenase levels. Both treatments induced caspase 3 activity, DNA fragmentation, malondialdehyde (MDA) production, and superoxide dismutase activity in the cells. MDA production was higher after Tl(III) than after Tl(I) treatment. Moreover, co-treatment with antioxidants, such as mannitol, ascorbic acid, or tocopherol, significantly attenuated the Tl-induced decrease in GT1-7 cell numbers. Therefore, both treatments induced oxidative stress-related apoptosis. Furthermore, Tl(III) reduced the cell viability more subtly than Tl(I) after 1 and 3 h of treatment. This effect was enhanced by co-treatment with maltol or citric acid, which promoted the influx of metallic elements into the cells. Thus, Tl(III) entered GT1-7 cells later than Tl(I) and had a delayed onset of toxicity. However, Tl(III) likely produces more extracellular lipid peroxides, which may explain its stronger cytotoxicity.

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“…In addition to different concentrations of spiked Tl, the results may also be constrained by the different solubilities of TlCl (solubility is 2.9 g/L) and Tl(NO 3 ) 3 (solubility is 95.5 g/L) [61,62]. Furthermore, Tl(III) is thermodynamic unstable and could be reduced to Tl(I), then bio-absorbed by the root [63,64].…”

Section: Ca-induced Plant-enhanced Tl Accumulationmentioning

confidence: 99%

Calcium Enhances Thallium Uptake in Green Cabbage (Brassica oleracea var. capitata L.)

Jia

Xiao

Sun

et al. 2022

IJERPH

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Thallium (Tl) is a nonessential and toxic trace metal that is detrimental to plants, but it can be highly up-taken in green cabbage (Brassica oleracea L. var. capitata L.). It has been proven that there is a significant positive correlation between Tl and Calcium (Ca) contents in plants. However, whether Ca presents a similar role for alleviating Tl toxicity in plants remains unclear, and little is known in terms of evidence for both Ca-enhanced uptake of Tl from soils to green cabbage and associated geochemical processes. In this study, we investigated the influence of Ca in soils on Tl uptake in green cabbage and the associated geochemical process. The pot experiments were conducted in 12 mg/kg Tl(I) and 8 mg/kg Tl(III) treatments with various Ca dosages. The results showed that Ca in soils could significantly enhance Tl uptake in green cabbage, increasing 210% in content over the control group. The soluble concentrations of Tl were largely increased by 210% and 150%, respectively, in 3.0 g/kg Ca treatment, compared with the corresponding treatment without Ca addition. This was attributed to the geochemical process in which the enhanced soluble Ca probably replaces Tl held on the soil particles, releasing more soluble Tl into the soil solution. More interestingly, the bioconcentration factor of the leaves and whole plant for the 2.0, 2.5, 3.0 g/kg Ca dosage group were greatly higher than for the non-Ca treatment, which could reach 207%, implying the addition of Ca can improve the ability of green cabbage to transfer Tl from the stems to the leaves. Furthermore, the pH values dropped with the increasing Ca concentration treatment, and the lower pH in soils also increased Tl mobilization, which resulted in Tl accumulation in green cabbage. Therefore, this work not only informs the improvement of agricultural safety management practices for the farming of crops in Tl-polluted and high-Ca-content areas, but also provides technical support for the exploitation of Ca-assisted phytoextraction technology.

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Thallium-induced oxalate secretion from rice (Oryza sativa L.) root contributes to the reduction of Tl(III) to Tl(I)

Cited by 17 publications

References 48 publications

Acid resistance of Masson pine (Pinus massoniana Lamb.) families and their root morphology and physiological response to simulated acid deposition

Acid resistance of Masson pine (Pinus massoniana Lamb.) families and their root morphology and physiological response to simulated acid deposition

Toxic Effects of Two Redox States of Thallium on Immortalised Hypothalamic GT1-7 Neuronal Cells

Calcium Enhances Thallium Uptake in Green Cabbage (Brassica oleracea var. capitata L.)

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