title: Diazotrophs-assisted phytoremediation of heavy metals: a novel approach.
abstract: Heavy metals, which have severe toxic effects on plants, animals, and human health, are serious pollutants of the modern world. Remediation of heavy metal pollution is utmost necessary. Among different approaches used for such remediation, phytoremediation is an emerging technology. Research is in progress to enhance the efficiency of this plant-based technology. In this regard, the role of rhizospheric and symbiotic microorganisms is important. It was assessed by enumeration of data from the current studies that efficiency of phytoremediation can be enhanced by assisting with diazotrophs. These bacteria are very beneficial because they bring metals to more bioavailable form by the processes of methylation, chelation, leaching, and redox reactions and the production of siderophores. Diazotrophs also posses growth-promoting traits including nitrogen fixation, phosphorous solubilization, phytohormones synthesis, siderophore production, and synthesis of ACC-deaminase which may facilitate plant growth and increase plant biomass, in turn facilitating phytoremediation technology. Thus, the aim of this review is to highlight the potential of diazotrophs in assisting phytoremediation of heavy metals in contaminated soils. The novel current assessment of literature suggests the winning combination of diazotroph with phytoremediation technology.
authors.affiliation: Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
authors.forename: Abid
authors.initials: A
authors.lastname: Ullah
authors.forename: Hafsa
authors.initials: H
authors.lastname: Mushtaq
authors.forename: Hazrat
authors.initials: H
authors.lastname: Ali
authors.forename: Muhammad Farooq Hussain
authors.initials: MF
authors.lastname: Munis
authors.forename: Muhammad Tariq
authors.initials: MT
authors.lastname: Javed
authors.forename: Hassan Javed
authors.initials: HJ
authors.lastname: Chaudhary
mesh_terms: D000818:Animals; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019755:Carbon-Carbon Lyases; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D009586:Nitrogen Fixation; D010944:Plants / Q000378:metabolism* / Q000382:microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D019216:Metals, Heavy; D012989:Soil Pollutants; C033634:1-aminocyclopropane-1-carboxylate deaminase; D019755:Carbon-Carbon Lyases