Green remediation of toxic metals contaminated mining soil using bacterial consortium and Brassica juncea

Jeyasundar, Parimala Gnana Soundari Arockiam; Ali, Amjad; Azeem, Muhammad; Li, Yiman; Guo, Di; Sikdar, Ashim; Abdelrahman, Hamada; Kwon, Eilhann E.; Antoniadis, Vasileios; Mani, Vellingiri Manon; Shaheen, Sabry M.; Rinklebe, Jörg; Zhang, Zengqiang

doi:10.1016/j.envpol.2021.116789

Cited by 73 publications

(24 citation statements)

References 114 publications

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“…However, very few studies have assessed the potential benefits of bacteria in an assisted phytostabilisation process that combines cultivating metal-excluding plants, metaltolerant PGPBs and metal-immobilizing soil amendments. PGPBs have been more often tested in metal phytoextraction systems [54,55]. Our data shows that the effectiveness of soil amendments in the phytostabilisation of heavily polluted smelter deposits can be enhanced by PGPB.…”

Section: Discussionmentioning

confidence: 73%

Testing Combined Effect of Amendments and Inoculation with Bacteria for Improving Phytostabilisation of Smelter Waste Extremely Contaminated with Trace Elements

Siebielec

Marzec-Grządziel

et al. 2021

Agronomy

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Smelter waste deposits pose environmental and health threats and require remediation actions. Phytostabilisation techniques, based on soil amendments, help to establish plant cover and limit the secondary emission of potentially toxic trace elements. However, methods to optimize their effectiveness are needed. The application of bacterial inoculants in combination with soil amendments in the remediation of soils and wastes contaminated with metals still has not been extensively tested. Therefore, the aim of this study was to determine the effectiveness of indigenous (Streptomyces sp., Pseudomonas sp.) and foreign (Streptomyces costaricanus) strains of bacteria in supporting grass growth on extremely contaminated waste slag. They were applied alone and in combination with compost mixed with phosphate fertilizer or iron oxide. The tested strains improved plant growth and increased plant availability of phosphorus. The interaction of the soil amendments and some bacterial strains also stimulated a decrease in the extractability of metals, likely through the phosphate-induced precipitation of lead. Our data show that the effectiveness of soil amendments in the phytostabilisation of heavily polluted smelter deposits can be enhanced by plant growth-promoting bacteria (PGPB).

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Section: Discussionmentioning

confidence: 73%

Testing Combined Effect of Amendments and Inoculation with Bacteria for Improving Phytostabilisation of Smelter Waste Extremely Contaminated with Trace Elements

Siebielec

Marzec-Grządziel

et al. 2021

Agronomy

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“…B. juncea is a rapid-growth plant with an appreciable capacity to absorb various toxic heavy metals. Thus, B. juncea is frequently applied to the ‘green’ remediation of toxic metal-contaminated mining soils [ 29 ].…”

Section: Discussionmentioning

confidence: 99%

Identification and functional analysis of cation-efflux transporter 1 from Brassica juncea L.

Han

Zhang

et al. 2022

BMC Plant Biol

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Background Brassica juncea behaves as a moderate-level accumulator of various heavy metal ions and is frequently used for remediation. To investigate the roles of metal ion transporters in B. juncea, a cation-efflux family gene, BjCET1, was cloned and functionally characterized. Results BjCET1 contains 382 amino acid residues, including a signature motif of the cation diffusion facilitator protein family, six classic trans-membrane-spanning structures and a cation-efflux domain. A phylogenetic analysis showed that BjCET1 has a high similarity level with metal tolerance proteins from other Brassica plants, indicating that this protein family is highly conserved in Brassica. BjCET1 expression significantly increased at very early stages during both cadmium and zinc treatments. Green fluorescence detection in transgenic tobacco leaves revealed that BjCET1 is a plasma membrane-localized protein. The heterologous expression of BjCET1 in a yeast mutant increased the heavy-metal tolerance and decreased the cadmium or zinc accumulations in yeast cells, suggesting that BjCET1 is a metal ion transporter. The constitutive expression of BjCET1 rescued the heavy-metal tolerance capability of transgenic tobacco plants. Conclusions The data suggest that BjCET1 is a membrane-localized efflux transporter that plays essential roles in heavy metal ion homeostasis and hyper-accumulation.

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“…Several studies have reported plants demonstrating PTEs phytoextraction capacity. Phytoextraction is preferred over other techniques because toxic elements can be harvested from plant shoots in an extractable form ( Jeyasundar et al, 2021 ). Several studies have reported different plants with varying capacities in the phytoextraction of PTEs.…”

Section: Phytoremediationmentioning

confidence: 99%

Understanding the Phytoremediation Mechanisms of Potentially Toxic Elements: A Proteomic Overview of Recent Advances

et al. 2022

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Potentially toxic elements (PTEs) such as cadmium (Cd), lead (Pb), chromium (Cr), and arsenic (As), polluting the environment, pose a significant risk and cause a wide array of adverse changes in plant physiology. Above threshold accumulation of PTEs is alarming which makes them prone to ascend along the food chain, making their environmental prevention a critical intervention. On a global scale, current initiatives to remove the PTEs are costly and might lead to more pollution. An emerging technology that may help in the removal of PTEs is phytoremediation. Compared to traditional methods, phytoremediation is eco-friendly and less expensive. While many studies have reported several plants with high PTEs tolerance, uptake, and then storage capacity in their roots, stem, and leaves. However, the wide application of such a promising strategy still needs to be achieved, partly due to a poor understanding of the molecular mechanism at the proteome level controlling the phytoremediation process to optimize the plant’s performance. The present study aims to discuss the detailed mechanism and proteomic response, which play pivotal roles in the uptake of PTEs from the environment into the plant’s body, then scavenge/detoxify, and finally bioaccumulate the PTEs in different plant organs. In this review, the following aspects are highlighted as: (i) PTE’s stress and phytoremediation strategies adopted by plants and (ii) PTEs induced expressional changes in the plant proteome more specifically with arsenic, cadmium, copper, chromium, mercury, and lead with models describing the metal uptake and plant proteome response. Recently, interest in the comparative proteomics study of plants exposed to PTEs toxicity results in appreciable progress in this area. This article overviews the proteomics approach to elucidate the mechanisms underlying plant’s PTEs tolerance and bioaccumulation for optimized phytoremediation of polluted environments.

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Green remediation of toxic metals contaminated mining soil using bacterial consortium and Brassica juncea

Cited by 73 publications

References 114 publications

Testing Combined Effect of Amendments and Inoculation with Bacteria for Improving Phytostabilisation of Smelter Waste Extremely Contaminated with Trace Elements

Testing Combined Effect of Amendments and Inoculation with Bacteria for Improving Phytostabilisation of Smelter Waste Extremely Contaminated with Trace Elements

Identification and functional analysis of cation-efflux transporter 1 from Brassica juncea L.

Understanding the Phytoremediation Mechanisms of Potentially Toxic Elements: A Proteomic Overview of Recent Advances

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