Genetic engineering of plants for phytoremediation: advances and challenges

Kumar, Kundan; Shinde, Akshay; Aeron, Varad; Verma, Aanchal; Arif, Naseera Sayed

doi:10.1007/s13562-022-00776-3

Cited by 36 publications

(12 citation statements)

References 171 publications

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“…It has been demonstrated that increased gibberellin production in transgenic plants encourages growth and biomass production over numerous cycles of decontamination [ 94 ]. Further, plant genetic engineering can be an effective approach to exploit potential genes involved in metal uptake, translocation, reduction, vacuolar sequestration and volatilization [ 131 ]. The proteins involved in metal absorption, translocation, and sequestration are encoded by several plant genes [ 131 , 132 ].…”

Section: Recent Advances In Phytoremediationmentioning

confidence: 99%

“…Further, plant genetic engineering can be an effective approach to exploit potential genes involved in metal uptake, translocation, reduction, vacuolar sequestration and volatilization [ 131 ]. The proteins involved in metal absorption, translocation, and sequestration are encoded by several plant genes [ 131 , 132 ]. The buildup of metal may grow several times over with the introduction of these genes into potential plants or through thegenetic modification of metal transporters [ 133 ].…”

Section: Recent Advances In Phytoremediationmentioning

confidence: 99%

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Phytoremediation of Potentially Toxic Elements: Role, Status and Concerns

Wani

Ahmad

Asgher

et al. 2023

Plants

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Environmental contamination with a myriad of potentially toxic elements (PTEs) is triggered by various natural and anthropogenic activities. However, the industrial revolution has increased the intensity of these hazardous elements and their concentration in the environment, which, in turn, could provoke potential ecological risks. Additionally, most PTEs pose a considerable nuisance to human beings and affect soil, aquatic organisms, and even nematodes and microbes. This comprehensive review aims to: (i) introduce potentially toxic elements; (ii) overview the major sources of PTEs in the major environmental compartments; (iii) briefly highlight the major impacts of PTEs on humans, plants, aquatic life, and the health of soil; (iv) appraise the major methods for tackling PTE-caused pollution; (v) discuss the concept and applications of the major eco-technological/green approaches (comprising phytoextraction, rhizofiltration, phytostabilization, phytovolatilization, and phytorestoration); (vi) highlight the role of microbes in phytoremediation under PTE stress; and (vii) enlighten the major role of genetic engineering in advancing the phytoremediation of varied PTEs. Overall, appropriate strategies must be developed in order to stop gene flow into wild species, and biosafety issues must be properly addressed. Additionally, consistent efforts should be undertaken to tackle the major issues (e.g., risk estimation, understanding, acceptance and feasibility) in order to guarantee the successful implementation of phytoremediation programs, raise awareness of this green technology among laymen, and to strengthen networking among scientists, stakeholders, industrialists, governments and non-government organizations.

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Section: Recent Advances In Phytoremediationmentioning

confidence: 99%

Section: Recent Advances In Phytoremediationmentioning

confidence: 99%

Phytoremediation of Potentially Toxic Elements: Role, Status and Concerns

Wani

Ahmad

Asgher

et al. 2023

Plants

View full text Add to dashboard Cite

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“…In addition, metal‐chelating ligands and transporters are two important factors that affect metal accumulation in trichomes. To find the key genes which regulate the biosynthesis of metal‐chelating ligands and the expression of the related metal transporters is pivotal for using genetic engineering approaches to improve the efficiency of phytoextraction (Kumar et al, 2022). For example, it was found in A. thaliana that overexpressing the cytosolic O ‐acetylserine(thiol)lyase gene ( Atcys‐3A ) (i.e., enhancing cysteine biosynthesis) significantly improved Cd accumulation in the leaf trichomes (Ager et al, 2003; Domínguez‐Solís et al, 2004).…”

Section: Future Research Perspectivesmentioning

confidence: 99%

The overlooked functions of trichomes: Water absorption and metal detoxication

Cui

Wang

et al. 2023

Plant Cell & Environment

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Trichomes are epidermal outgrowths on plant shoots. Their roles in protecting plants against herbivores and in the biosynthesis of specialized metabolites have long been recognized. Recently, studies are increasingly showing that trichomes also play important roles in water absorption and metal detoxication, with these roles having important implications for ecology, the environment, and agriculture. However, these two functions of trichomes have been largely overlooked and much remains unknown. In this review, we show that the trichomes of 37 plant species belonging to 14 plant families are involved in water absorption, while the trichomes of 33 species from 13 families are capable of sequestering metals within their trichomes. The ability of trichomes to absorb water results from their decreased hydrophobicity compared to the remainder of the leaf surface as well as the presence of special structures for collecting and absorbing water. In contrast, the metal detoxication function of trichomes results not only from the good connection of their basal cells to the underlying vascular tissues, but also from the presence of metal‐chelating ligands and transporters within the trichomes themselves. Knowledge gaps and critical future research questions regarding these two trichome functions are highlighted. This review improves our understanding on trichomes.

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“…Phytoextraction is the process of contaminants being taken up through plant roots into their biomass (Karalija et al, 2022). Chemically enhanced phytoextraction increases the bioavailability of target contaminants, leading to greater extraction rates (M. Kumar, Bolan, et al, 2022;K. Kumar, Shinde, et al, 2022).…”

Section: Phytoextractionmentioning

confidence: 99%

“…The merA gene encodes a protein called mercuric reductase, which converts Hg(II) to elemental Hg(0) (M. Ma et al, 2019). The merA gene has been modified in plants using genetic engineering to remove Hg (Krout et al, 2022;K. Kumar, Shinde, et al, 2022).…”

Section: Phytovolatilisationmentioning

confidence: 99%

Bioremediation of mercury contaminated soil and water: A review

Kumar,

Chawla

et al. 2023

Land Degrad Dev

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Mercury (Hg) pollution of soil and water environments is a major global threat to human health, agri‐food systems and ecosystems and industrial activities mainly coal combustion augmented their content in different environmental media. Bioremediation is a nature‐based solution involving microbial‐ and plant‐based (phytoremediation) technologies that clean‐up Hg contaminated sites. Here, we review Hg‐resistant bacteria and how latest insights in our understanding of the cellular and biochemical mechanisms of the mer operon genes responsible for Hg resistance and transformation have facilitated developments in microbial Hg‐bioremediation. We also review the phytoremediation mechanisms, including those of bacterial‐ and fungi‐assisted phytoremediation processes, which have shown promising results in reducing Hg2+ to Hg0. This review provides a detailed knowledge of novel Hg bioremediation mechanisms and methods. Consequently, microbial‐ and phyto‐based bioremediation technologies have a critical role in the reclamation of Hg‐contaminated environments and the protection of human health and ecosystems.

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Genetic engineering of plants for phytoremediation: advances and challenges

Cited by 36 publications

References 171 publications

Phytoremediation of Potentially Toxic Elements: Role, Status and Concerns

Phytoremediation of Potentially Toxic Elements: Role, Status and Concerns

The overlooked functions of trichomes: Water absorption and metal detoxication

Bioremediation of mercury contaminated soil and water: A review

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