Phytoremediation of 137Cs: factors and consequences in the environment

Singh, B. S. Manisha; Dhal, Nabin Kumar; Kumar, Manish; Mohapatra, Dinakrushna; Seshadri, H.; Rout, N. C.; Nayak, Monalisha

doi:10.1007/s00411-022-00985-3

Cited by 8 publications

(2 citation statements)

References 161 publications

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“…Cesium (Cs) has received global attention because large amounts of its radioactive isotopes ( 134 Cs and 137 Cs) were released into the environment after the 1986 Chernobyl and 2011 Fukushima nuclear power plant accidents (Buesseler et al, 2012;Hirose, 2016;Vasylenko et al, 2021;Nakamura et al, 2022;Wu et al, 2022). Since the latter half of the 2010s, there has been an increase in the amount of research on radioactive Cs + contamination of the soil (Sakai et al, 2021;Singh et al, 2022), decontamination and bioremediation efforts (Liu et al, 2014;Singh et al, 2022), and the quest to identify Cs + -resistant microorganisms (Dekker et al, 2014;Kato et al, 2016;Swer et al, 2016; with low Cs + -resistant performance; it is thought that this will lead to the creation of highly functional radioresistant bacteria that efficiently recover radioactive cesium from radioactive cesium-contaminated environments. Therefore, such highly functional microorganisms can be used for bioremediation in contaminated environments.…”

Section: Introductionmentioning

confidence: 99%

A magnesium transporter is involved in the cesium ion resistance of the high-concentration cesium ion-resistant bacterium Microbacterium sp. TS-1

et al. 2023

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Cesium ion (Cs+) resistance has been reported in bacteria but is poorly understood as reports on Cs+-resistant bacteria have been limited. We previously reported a novel Cs+/H+ antiporter CshA implicated in Cs+-resistance in Microbacterium sp. TS-1. The present study used the same screening method to isolate novel Cs+-sensitive mutants and their revertants from TS-1. A comparative mutation site analysis using whole-genome sequencing revealed that MTS1_03028 encodes the Mg2+ transporter MgtE and is a candidate Cs+ resistance-related gene. We performed a bioinformatic analysis of MTS1_03028 and complementation experiments on Cs+ resistance in the TS-1 MTS1_03028 mutants Mut5 and Mut7 as well as Escherichia coli expressing MTS1_03028 in the presence of Mg2+. We established the role of MgtE in Cs+ resistance through a functional analysis of TS-1. Enhancing Mg2+ transport by expression of MTS_03028 conferred increased Cs+ resistance. When this strain was exposed to Cs+ concentrations exceeding 200 mM, CshA consistently lowered the intracellular Cs+ concentration. To our knowledge, the present study is the first to clarify the mechanism of Cs+ resistance in certain bacteria. The study findings offer important insights into the mechanism of bacterial resistance to excess Cs+ in the environment, suggesting the potential for bioremediation in high Cs-contaminated areas.

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Section: Introductionmentioning

confidence: 99%

A magnesium transporter is involved in the cesium ion resistance of the high-concentration cesium ion-resistant bacterium Microbacterium sp. TS-1

et al. 2023

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“…Considering the low level of accumulation of radionuclides in the nectar and pollen of plants, which is food for honey bees and raw material for the production of beekeeping products, it is promising to use phytoremediation of contaminated soils by growing nectar-pollenbearing crops on them with the removal of their vegetative mass and subsequent utilization [Wieczorek et al, 2020;Singh et al, 2022].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Phytoremediation of <sup>137</sup>CS Contaminated Soils during the Cultivation of Nectar-Pollinating Plants

Razanov¹,

Kutsenko²,

Klymenko³

et al. 2023

J. Ecol. Eng.

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The man-made activity of mankind has led to the emergence of many global problems and caused the deterioration of the quality of the natural environment (air, water, soil). Of particular concern is the contamination of agricultural land with toxicants, in particular, radionuclides, which, entering the soil -plant -human body food chain, can reach toxic levels. Therefore, an important task is the removal of hazardous substances from the soil. Phytoremediation can be one of the effective methods for reducing its pollution. The article examines the effectiveness of phytoremediation of soils contaminated as a result of the accident at the Chernobyl nuclear power plant in certain territories of Polissia of Ukraine (Korosten district of Zhytomyr region). Nectar-pollinating plants were selected for the research, which was carried out for two years: great globe-thistle (Echinops sphaerocephalus), milk thistle (Silybum marianum), and white melilot (Melilotus albus). The results of the research showed that in the dry vegetative mass of milk thistle, great globe-thistle, and white melilot, the specific activity of 137 Cs over the two years of research was in the range from 30.8 Bq/kg to 238.5 Bq/kg, the accumulation coefficient -from 0.135 to 0.985, and the hazard coefficientfrom 0.055 to 0.395. The highest indicators of specific activity and accumulation coefficient of 137 Cs were observed in the vegetative mass of the white melilot, which amounted to 238.5 Bq/kg and 0.96, respectively, comparatively lower values -2.3 times and 2.3 times were found in the vegetative mass of milk thistle, 2.8 times and 7.1 times -in the vegetative mass of the great globe-thistle. At this level of accumulation of 137 Cs in the vegetative mass of nectarine plants from the soil, on average, over two years of research, 1130550 Bq of this radionuclide was removed from the soil per hectare of agricultural land with milk thistle, 621250 Bq with great globe-thistle, and 2851650 Bq with white melilot. The removal of 137 Cs with the vegetative mass of nectarine plants reduced the content of this radionuclide in the soil per 1 kg -from 3.4% to 8% on average over two years of research.

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Impacts of soil type and drought stress on growth and cesium accumulation in Napier grass

Kang,

Tazoe

2024

Environ Geochem Health

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Phytoremediation of 137Cs: factors and consequences in the environment

Cited by 8 publications

References 161 publications

A magnesium transporter is involved in the cesium ion resistance of the high-concentration cesium ion-resistant bacterium Microbacterium sp. TS-1

A magnesium transporter is involved in the cesium ion resistance of the high-concentration cesium ion-resistant bacterium Microbacterium sp. TS-1

Assessment of Phytoremediation of <sup>137</sup>CS Contaminated Soils during the Cultivation of Nectar-Pollinating Plants

Impacts of soil type and drought stress on growth and cesium accumulation in Napier grass

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