Cargando…

Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms

Heavy metal contamination in soils endangers humans and the biosphere by reducing agricultural yield and negatively impacting ecosystem health. In recent decades, this issue has been addressed and partially remedied through the use of “green technology,” which employs metal-tolerant plants to clean...

Descripción completa

Detalles Bibliográficos
Autores principales: Wang, Yue, Narayanan, Mathiyazhagan, Shi, Xiaojun, Chen, Xinping, Li, Zhenlun, Natarajan, Devarajan, Ma, Ying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9404692/
https://www.ncbi.nlm.nih.gov/pubmed/36033871
http://dx.doi.org/10.3389/fmicb.2022.966226
_version_ 1784773694958075904
author Wang, Yue
Narayanan, Mathiyazhagan
Shi, Xiaojun
Chen, Xinping
Li, Zhenlun
Natarajan, Devarajan
Ma, Ying
author_facet Wang, Yue
Narayanan, Mathiyazhagan
Shi, Xiaojun
Chen, Xinping
Li, Zhenlun
Natarajan, Devarajan
Ma, Ying
author_sort Wang, Yue
collection PubMed
description Heavy metal contamination in soils endangers humans and the biosphere by reducing agricultural yield and negatively impacting ecosystem health. In recent decades, this issue has been addressed and partially remedied through the use of “green technology,” which employs metal-tolerant plants to clean up polluted soils. Furthermore, the global climate change enhances the negative effects of climatic stressors (particularly drought, salinity, and extreme temperatures), thus reducing the growth and metal accumulation capacity of remediating plants. Plant growth-promoting bacteria (PGPB) have been widely introduced into plants to improve agricultural productivity or the efficiency of phytoremediation of metal-contaminated soils via various mechanisms, including nitrogen fixation, phosphate solubilization, phytohormone production, and biological control. The use of metal-tolerant plants, as well as PGPB inoculants, should hasten the process of moving this technology from the laboratory to the field. Hence, it is critical to understand how PGPB ameliorate environmental stress and metal toxicity while also inducing plant tolerance, as well as the mechanisms involved in such actions. This review attempts to compile the scientific evidence on this topic, with a special emphasis on the mechanism of PGPB involved in the metal bioremediation process [plant growth promotion and metal detoxification/(im)mobilization/bioaccumulation/transformation/translocation] and deciphering combined stress (metal and climatic stresses) tolerance.
format Online
Article
Text
id pubmed-9404692
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher Frontiers Media S.A.
record_format MEDLINE/PubMed
spelling pubmed-94046922022-08-26 Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms Wang, Yue Narayanan, Mathiyazhagan Shi, Xiaojun Chen, Xinping Li, Zhenlun Natarajan, Devarajan Ma, Ying Front Microbiol Microbiology Heavy metal contamination in soils endangers humans and the biosphere by reducing agricultural yield and negatively impacting ecosystem health. In recent decades, this issue has been addressed and partially remedied through the use of “green technology,” which employs metal-tolerant plants to clean up polluted soils. Furthermore, the global climate change enhances the negative effects of climatic stressors (particularly drought, salinity, and extreme temperatures), thus reducing the growth and metal accumulation capacity of remediating plants. Plant growth-promoting bacteria (PGPB) have been widely introduced into plants to improve agricultural productivity or the efficiency of phytoremediation of metal-contaminated soils via various mechanisms, including nitrogen fixation, phosphate solubilization, phytohormone production, and biological control. The use of metal-tolerant plants, as well as PGPB inoculants, should hasten the process of moving this technology from the laboratory to the field. Hence, it is critical to understand how PGPB ameliorate environmental stress and metal toxicity while also inducing plant tolerance, as well as the mechanisms involved in such actions. This review attempts to compile the scientific evidence on this topic, with a special emphasis on the mechanism of PGPB involved in the metal bioremediation process [plant growth promotion and metal detoxification/(im)mobilization/bioaccumulation/transformation/translocation] and deciphering combined stress (metal and climatic stresses) tolerance. Frontiers Media S.A. 2022-08-11 /pmc/articles/PMC9404692/ /pubmed/36033871 http://dx.doi.org/10.3389/fmicb.2022.966226 Text en Copyright © 2022 Wang, Narayanan, Shi, Chen, Li, Natarajan and Ma. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Microbiology
Wang, Yue
Narayanan, Mathiyazhagan
Shi, Xiaojun
Chen, Xinping
Li, Zhenlun
Natarajan, Devarajan
Ma, Ying
Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms
title Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms
title_full Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms
title_fullStr Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms
title_full_unstemmed Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms
title_short Plant growth-promoting bacteria in metal-contaminated soil: Current perspectives on remediation mechanisms
title_sort plant growth-promoting bacteria in metal-contaminated soil: current perspectives on remediation mechanisms
topic Microbiology
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9404692/
https://www.ncbi.nlm.nih.gov/pubmed/36033871
http://dx.doi.org/10.3389/fmicb.2022.966226
work_keys_str_mv AT wangyue plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms
AT narayananmathiyazhagan plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms
AT shixiaojun plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms
AT chenxinping plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms
AT lizhenlun plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms
AT natarajandevarajan plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms
AT maying plantgrowthpromotingbacteriainmetalcontaminatedsoilcurrentperspectivesonremediationmechanisms