Jacks of Metal/metalloid Chelation Trade in Plants-an Overview

Overview

Journal Front Plant Sci

Date 2015 Apr 18

PMID 25883598

Citations 34

Authors

Naser A Anjum

Mirza Hasanuzzaman

Mohammad A Hossain

Palaniswamy Thangavel

Aryadeep Roychoudhury

Sarvajeet S Gill

Miguel A Merlos Rodrigo

Vojtech Adam

Masayuki Fujita

Rene Kizek

Armando C Duarte

Eduarda Pereira

Iqbal Ahmad

Affiliations

Soon will be listed here.

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.

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