title: Jacks of metal/metalloid chelation trade in plants-an overview.
abstract: Varied environmental compartments including soils are being contaminated by a myriad toxic metal(loid)s (hereafter termed as "metal/s") mainly through anthropogenic activities. These metals may contaminate food chain and bring irreparable consequences in human. Plant-based approach (phytoremediation) stands second to none among bioremediation technologies meant for sustainable cleanup of soils/sites with metal-contamination. In turn, the capacity of plants to tolerate potential consequences caused by the extracted/accumulated metals decides the effectiveness and success of phytoremediation system. Chelation is among the potential mechanisms that largely govern metal-tolerance in plant cells by maintaining low concentrations of free metals in cytoplasm. Metal-chelation can be performed by compounds of both thiol origin (such as GSH, glutathione; PCs, phytochelatins; MTs, metallothioneins) and non-thiol origin (such as histidine, nicotianamine, organic acids). This paper presents an appraisal of recent reports on both thiol and non-thiol compounds in an effort to shed light on the significance of these compounds in plant-metal tolerance, as well as to provide scientific clues for the advancement of metal-phytoextraction strategies.
authors.affiliation: Centre for Environmental and Marine Studies and Department of Chemistry, University of Aveiro Aveiro, Portugal.
authors.forename: Naser A
authors.initials: NA
authors.lastname: Anjum
authors.affiliation: Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University Dhaka, Bangladesh.
authors.forename: Mirza
authors.initials: M
authors.lastname: Hasanuzzaman
authors.affiliation: Department of Genetics and Plant Breeding, Bangladesh Agricultural University Mymensingh, Bangladesh.
authors.forename: Mohammad A
authors.initials: MA
authors.lastname: Hossain
authors.affiliation: Department of Environmental Science, School of Life Sciences, Periyar University Salem, India.
authors.forename: Palaniswamy
authors.initials: P
authors.lastname: Thangavel
authors.affiliation: Post Graduate Department of Biotechnology, St. Xavier's College (Autonomous) Kolkata, India.
authors.forename: Aryadeep
authors.initials: A
authors.lastname: Roychoudhury
authors.affiliation: Stress Physiology and Molecular Biology Lab, Centre for Biotechnology, Maharshi Dayanand University Rohtak, India.
authors.forename: Sarvajeet S
authors.initials: SS
authors.lastname: Gill
authors.affiliation: Central European Institute of Technology, Brno University of Technology Brno, Czech Republic ; Department of Chemistry and Biochemistry, Mendel University in Brno Brno, Czech Republic.
authors.forename: Miguel A Merlos
authors.initials: MA
authors.lastname: Rodrigo
authors.affiliation: Central European Institute of Technology, Brno University of Technology Brno, Czech Republic ; Department of Chemistry and Biochemistry, Mendel University in Brno Brno, Czech Republic.
authors.forename: Vojtěch
authors.initials: V
authors.lastname: Adam
authors.affiliation: Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa University Miki-cho, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Fujita
authors.affiliation: Central European Institute of Technology, Brno University of Technology Brno, Czech Republic ; Department of Chemistry and Biochemistry, Mendel University in Brno Brno, Czech Republic.
authors.forename: Rene
authors.initials: R
authors.lastname: Kizek
authors.affiliation: Centre for Environmental and Marine Studies and Department of Chemistry, University of Aveiro Aveiro, Portugal.
authors.forename: Armando C
authors.initials: AC
authors.lastname: Duarte
authors.affiliation: Centre for Environmental and Marine Studies and Department of Chemistry, University of Aveiro Aveiro, Portugal.
authors.forename: Eduarda
authors.initials: E
authors.lastname: Pereira
authors.affiliation: Centre for Environmental and Marine Studies and Department of Chemistry, University of Aveiro Aveiro, Portugal ; Centre for Environmental and Marine Studies and Department of Biology, University of Aveiro Aveiro, Portugal.
authors.forename: Iqbal
authors.initials: I
authors.lastname: Ahmad
keywords: chelation; glutathione; metal/metalloids; metallothioneins; organic acid; phytochelatins; plant tolerance; thiol compounds