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Phytoremediation using genetically engineered plants to remove metals: a review

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Abstract

Contamination by heavy metals including As, Cd, Co, Cu, Fe, Hg, Mn, Ni and Zn in agricultural fields is a global safety issue. Indeed, excessive accumulations of metals have detrimental effects on life by altering cell components such as lipids, proteins, enzymes and DNA. Phytoremediation appears as a solution to remove metals from contaminated sites, yet metal uptake is usually low in most common plants. Therefore, genetically engineered plants have been designed for higher efficiency of metal accumulation. Here, we review metal phytoremediation by genetically engineered plants with focus on metal uptake and transport, mechanisms involving phytochelatin and metallothionein proteins, toxicity, plant species, methods of gene transfer and gene editing.

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Abbreviations

AtPCs1:

Arabidopsis thaliana phytochelatin synthase 1

AtACBP1:

Arabidopsis thaliana acyl-CoA-binding domain-containing protein 1

bphC:

Biphenyl-2,3-diol 1,2-dioxygenase

cad1–3:

Arabidopsis thaliana knockout mutant for phytochelatin synthase 1

CarMT:

Cicer arietinum metallothionein

CCoAOMT:

Caffeoyl-CoA O-methyltransferase

CePCs:

Caenorhabditis elegans phytochelatin synthase 1

chv:

Chromosomal virulence

CKX2:

Cytokinin dehydrogenase 2

COR15a:

Cold regulated 15 a promoter

IlMT2b:

Iris lactea var. chinensis metallothionein 2b

Lm-SAP:

Lobularia maritima stress-associated protein

MAN3:

Endo-1,4-β-Mannanase 3

merC:

Mercury transporter

Met:

Metallothionein

MsYSL:

Miscanthus sacchariflorus yellow stripe-like

OsARM1:

Oryza sativa arsenite-responsive myeloblastosis 1

OsMyb4:

Oryza sativa myeloblastosis 4

OsMT2c:

Oryza sativa metallothionein 2c

PCs1:

Phytochelatin synthase 1

PtoHMA5:

Populus tomentosa heavy metal ATPase 5

PtPCs:

Populus tomentosa phytochelatin synthase

PjHMT:

Prosopis juliflora heavy metal ATPase peptide

PtoEXPA12:

Populus tomentosa alpha expansin 12

PtPCs:

Populus tomentosa phytochelatin synthase

ricMT:

Rice metallothionein

SaCAD:

Sedum alfredii cinnamyl alcohol dehydrogenase

SsMT2:

Suaeda salsa metallothionein 2

VcPCs1:

Vicia sativa phytochelatin synthase 1

vir:

Virulence

VsCCoAOMT:

Vicia sativa caffeoyl-CoA O-methyltransferase

XCD1:

XVE system-induced cadmium-tolerance 1

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Acknowledgements

Authors are grateful to Bio-Rad Laboratories for providing the original pictures of Helios® Gene Gun and Gene Pulser Xcell™ Electroporation systems, Prof. Dr. Şule Arı from Istanbul University, Assoc. Prof. Dr. Semra Hasançebi from Trakya University and Assoc. Prof. Dr. Ali Yüksek from Ondokuz Mayis University for sharing some pictures of their previous studies.

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Correspondence to Ibrahim Ilker Ozyigit or Hasan Can.

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Ozyigit, I.I., Can, H. & Dogan, I. Phytoremediation using genetically engineered plants to remove metals: a review. Environ Chem Lett 19, 669–698 (2021). https://doi.org/10.1007/s10311-020-01095-6

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  • DOI: https://doi.org/10.1007/s10311-020-01095-6

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