Underlying mechanisms and effects of hydrated lime and selenium application on cadmium uptake by rice (Oryza sativa L.) seedlings

Huang, Gaoxiang; Ding, Changfeng; Guo, Fuyu; Li, Yong; Zhang, Taolin; Wang, Xingxiang

doi:10.1007/s11356-017-9573-5

Cited by 36 publications

(11 citation statements)

References 44 publications

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“…Cd contamination in soil has become a global concern. Several studies have demonstrated the harmful effects of Cd on plant growth, mainly manifested as leaf chlorosis, restricted root development, and decreased biomass [ 25 , 26 ]. In our study, rice seedlings grown in a solution containing 20 μM of Cd alone for 15 days showed stunted growth ( Table 1 ).…”

Section: Discussionmentioning

confidence: 99%

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Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Yan

Qin

et al. 2020

IJERPH

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Cadmium (Cd) is a pollutant toxic to plants and a potential threat to human health. Selenium (Se), though not essential for plants, has beneficial effects on plants under abiotic stress. A hydroponic experiment was conducted to investigate the impact of different forms of Se (Nano-Se, selenite, selenate, and SeMet) on accumulation, subcellular distribution, and chemical forms of Cd, as well as oxidative stress in rice seedlings. Cd (20 μmol·L−1) treatment significantly decreased biomass accumulation and chlorophyll content. The application of all Se forms, except selenate, mitigated the adverse effects of Cd on growth and chlorophyll content. The application of selenite, Nano-Se, and SeMet decreased root and shoot Cd concentrations as well as root-to-shoot Cd translocation in rice seedlings. Selenate application decreased shoot Cd concentration and root-to-shoot Cd translocation with no effect on root Cd concentration. Accordingly, Se increased the sequestration of Cd in the cell wall and vacuoles and decreased the active chemical form of Cd in rice seedlings. SeMet was the most effective supplement that decreased Cd concentration and enhanced Se concentration in the roots and shoots of rice seedlings. All forms of Se further enhanced catalase (CAT) and glutathione peroxidase (GSH-Px) activities and inhibited MDA accumulation. To conclude, Se influenced Cd accumulation and translocation in rice seedlings by altering the subcellular distribution, chemical forms, and antioxidant defense system under Cd stress. These effects were highly significant with SeMet treatment, probably due to better absorption and utilization by the plant.

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Section: Discussionmentioning

confidence: 99%

“…Thus, Se helps rice seedlings to adapt to Cd stress. Similarly, Se regulated antioxidant enzyme activities (e.g., CAT, GSH-Px, SOD, and POD) in plants under heavy metal stress [ 26 , 27 ]. In our study, the effect of Se in alleviating Cd stress was dependent on the Se species.…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Yan

Qin

et al. 2020

IJERPH

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“…The most important studies investigating Se and its role under Cd stress on rice plants include the application of Se to mitigate Cd accumulation in high-Cd-contaminated soils [192], the behavior of Se at different planting times [115], the effects of Se-forms and application methods on modulation of rice growth [83], how Se reduces the uptake and translocation of Cd from contaminated soils [193], and reducing oxidative stress induced by Cd [33,[194][195][196][197][198]. 4.…”

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confidence: 99%

Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges

et al. 2020

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Selenium is an essential micronutrient required for the health of humans and lower plants, but its importance for higher plants is still being investigated. The biological functions of Se related to human health revolve around its presence in 25 known selenoproteins (e.g., selenocysteine or the 21st amino acid). Humans may receive their required Se through plant uptake of soil Se, foods enriched in Se, or Se dietary supplements. Selenium nanoparticles (Se-NPs) have been applied to biofortified foods and feeds. Due to low toxicity and high efficiency, Se-NPs are used in applications such as cancer therapy and nano-medicines. Selenium and nano-selenium may be able to support and enhance the productivity of cultivated plants and animals under stressful conditions because they are antimicrobial and anti-carcinogenic agents, with antioxidant capacity and immune-modulatory efficacy. Thus, nano-selenium could be inserted in the feeds of fish and livestock to improvise stress resilience and productivity. This review offers new insights in Se and Se-NPs biofortification for edible plants and farm animals under stressful environments. Further, extensive research on Se-NPs is required to identify possible adverse effects on humans and their cytotoxicity.

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“…In addition, another iron-related mechanism, formation of iron plaques around roots of rice and wetland plants may also act as a barrier against uptake of Cu, Ni, Mn, and Cd (Taylor and Crowder 1983;Otte et al 1989;Greipsson 1994;Ye et al 1998;Wang and Peverly 1999). Recent studies suggested that the adsorption capacity of iron plaque around rice roots increased when Se was added, resulting in an increased sequestration of Cd (Huang et al 2017) and Hg (Zhou and Li 2018). Thus, greater metal sequestration in iron plaques by Se may affect Cd absorption by roots and may explain the tendency observed of a non-dose dependent reduction of Cd.…”

Section: Discussionmentioning

confidence: 99%

Can Cd content in crops be controlled by Se fertilization? A meta-analysis and outline of Cd sequestration mechanisms

2019

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Aim Cadmium mitigation in crops is a worldwide concern. Selenium application has been suggested as a potential solution to reduce cadmium concentration in plants, but published results were contradictory. We analysed literature data with respect to the effect of selenium addition on cadmium uptake and elucidated processes possibly involved. Method A meta-analysis was performed on data collected from previously published studies presenting cadmium concentration in plants subjected to selenium treatments. Metaregression random models were run to test the impact of different factors. In addition, soil and crop inventory data exemplifying the natural variation of Cd and Se in soil were evaluated. Results The results highlighted a significant reduction of cadmium concentration in crops after selenium addition. The reduction was dose-dependent for crops growing under aerobic, but not for plants cultivated under anoxic conditions such as rice. This suggests that different process can be involved. Conclusion We demonstrated the potential of selenium fertilization to mitigate cadmium uptake and highlighted that for non-rice species, the main process seems to take place in the soil, while mechanisms in roots restricting uptake may be involved for all crops. The inventory data also indicated an impact of natural soil Se on Cd contents in crops.

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Underlying mechanisms and effects of hydrated lime and selenium application on cadmium uptake by rice (Oryza sativa L.) seedlings

Cited by 36 publications

References 44 publications

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Effect of Different Forms of Selenium on the Physiological Response and the Cadmium Uptake by Rice under Cadmium Stress

Selenium and Nano-Selenium Biofortification for Human Health: Opportunities and Challenges

Can Cd content in crops be controlled by Se fertilization? A meta-analysis and outline of Cd sequestration mechanisms

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