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Menhas S, Hayat K, Niazi NK, Zhou P, Bundschuh J, Naeem M, Munis MFH, Yang X, Chaudhary HJ. Microbe-EDTA mediated approach in the phytoremediation of lead-contaminated soils using maize ( Zea mays L.) plants. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2020; 23:585-596. [PMID: 33166474 DOI: 10.1080/15226514.2020.1842997] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In the current study, we investigated the potential of Cronobacter sakazakii- ethylenediaminetetraacetic acid (EDTA) assisted phytoremediation potential of Zea mays L. to remediate lead (Pb)-contaminated soils. The C. sakazakii exhibited various stress tolerance mechanisms via plant growth promoting (PGP) traits, intrinsic extracellular enzyme production and antibiotic resistance. A greenhouse experiment was conducted to examine the dual effects of plant growth promoting endophytic bacteria (PGPEB)-chelator synergy in maize plants under different Pb contaminated soil regimes. C. sakazaii-EDTA (5 mM EDTA kg-1) complex significantly (p < 0.05) enhanced plant growth and biomass (48.91%); chlorophyll a, b and carotenoid contents (27.26%, 25.02% and 42.09%); relative water content (61.33%); proline content (63.60%); root and shoot Pb accumulation capacity (52.31% and 44.71%) in Pb contaminated soils. This may suggest the efficacy of current approach in enhancing plant tolerance capability toward Pb-uptake and phytoremediation capacity. Moreover, maize plants showed differential response to Pb availability in soil-1 (S1; Pb spiked soil, 500 mg kg-1) and soil-2 (S2; aged-contaminated soil) under various treatments. We describe the intriguing role of C. sakazakii-EDTA-maize system for Pb decontamination which can be used as a base line to explore the proposed combinatorial approach for long-term trails under field conditions for reclamation of Pb-contaminated soils.HighlightsThe PGPEB-EDTA mediated potential of Z. mays against Pb spiked and industrial contaminated soils is noticed.Increased tolerance of Z. mays against Pb in association with C. sakazakii, and EDTA is reported first time.Enhanced accumulation of metals by Z. mays is reported under combined treatment of C. sakazakii, and EDTA.Inoculation of plants with C. sakazakii, and EDTA has positive effects on growth and accumulation of Pb by Z. mays.
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Affiliation(s)
- Saiqa Menhas
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Kashif Hayat
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Nabeel Khan Niazi
- Institute of Soil and Environmental Sciences, University of Agriculture Faisalabad, Faisalabad, Pakistan
- School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba, Australia
| | - Pei Zhou
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Jochen Bundschuh
- School of Civil Engineering and Surveying, University of Southern Queensland, Toowoomba, Australia
- UNESCO Chair on Groundwater Arsenic within the 2030 Agenda for Sustainable Development and Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, Australia
| | - Muhammad Naeem
- Department of Plant Breeding and Genetics, Faculty of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | | | - Xijia Yang
- School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, P.R. China
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
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