期刊
FRONTIERS IN PLANT SCIENCE
卷 6, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2015.00192
关键词
metal/metalloids; plant tolerance; chelation; thiol compounds; glutathione; organic acid; metallothioneins; phytochelatins
资金
- Aveiro University Research Institute/Centre for Environmental and Marine Studies (CESAM)
- DST-SERB
- CSIR
- UGC, Government of India, New Delhi
- NANOSEMED [KAN208130801]
- SERB-DST
- CSIR, Government of India
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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