Mechanisms underlying mercury detoxification in soil–plant systems after selenium application: a review

Feasible countermeasures to mitigate mercury (Hg) accumulation and its deleterious effects on crops are urgently needed worldwide. Selenium (Se) fertilizer application is a cost-effective strategy to reduce Hg concentrations, promote agro-environmental sustainability and food safety, and decrease th...

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Veröffentlicht in:Environmental science and pollution research international 2021-09, Vol.28 (34), p.46852-46876
Hauptverfasser: Tran, Thi Anh Thu, Dinh, Quang Toan, Zhou, Fei, Zhai, Hui, Xue, Mingyue, Du, Zekun, Bañuelos, Gary S, Liang, Dongli
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container_end_page 46876
container_issue 34
container_start_page 46852
container_title Environmental science and pollution research international
container_volume 28
creator Tran, Thi Anh Thu
Dinh, Quang Toan
Zhou, Fei
Zhai, Hui
Xue, Mingyue
Du, Zekun
Bañuelos, Gary S
Liang, Dongli
description Feasible countermeasures to mitigate mercury (Hg) accumulation and its deleterious effects on crops are urgently needed worldwide. Selenium (Se) fertilizer application is a cost-effective strategy to reduce Hg concentrations, promote agro-environmental sustainability and food safety, and decrease the public health risk posed by Hg-contaminated soils and its accumulation in food crops. This holistic review focuses on the processes and detoxification mechanisms of Hg in whole soil–plant systems after Se application. The reduction of Hg bioavailability in soil, the formation of inert HgSe or/and HgSe-containing proteinaceous complexes in the rhizosphere and/or roots, and the reduction of plant root uptake and translocation of Hg in plant after Se application are systemically discussed. In addition, the positive responses in plant physiological and biochemical processes to Se application under Hg stress are presented to show the possible mechanisms for protecting the plant. However, application of high levels Se showed synergistic toxic effect with Hg and inhibited plant growth. The effectiveness of Se application methods, rates, and species on Hg detoxification is compared. This review provides a good approach for plant production in Hg-contaminated areas to meet food security demands and reduce the public health risk. Graphical abstract
doi_str_mv 10.1007/s11356-021-15048-1
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subjects Accumulation
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Bioavailability
Crops
Detoxification
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Fertilizer application
Food safety
Food security
Health risk assessment
Health risks
Mercury
Mercury (metal)
Mercury compounds
Plant growth
Plant production
Plant protection
Plant roots
Public health
Review Article
Reviews
Rhizosphere
Selenides
Selenium
Soil contamination
Soil pollution
Soils
Translocation
Waste Water Technology
Water Management
Water Pollution Control
title Mechanisms underlying mercury detoxification in soil–plant systems after selenium application: a review
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