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Lu H, Xia C, Chinnathambi A, Nasif O, Narayanan M, Shanmugam S, Lan Chi NT, Pugazhendhi A, On-Uma R, Jutamas K, Anupong W. Evaluation of cadmium tolerance and remediated efficacy of wild and mutated Enterobacter species isolated from potassium nitrate (KNO₃) processing unit contaminated soil. CHEMOSPHERE 2023; 311:136899. [PMID: 36265702 DOI: 10.1016/j.chemosphere.2022.136899] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 09/28/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
The purpose of this study was to find the most cadmium (Cd2+) tolerant and remediated bacteria isolate from KNO3 processing unit contaminated soil. One isolate out of 19 isolates possessed excellent Cd2+ tolerance than others, which was recognized as Enterobacter hormaechei SFC3 through molecular characterization (16S rRNA sequencing). The identified E. hormaechei SFC3 contained 55% and 45% of GC and AT content, respectively. The wild and acridine orange mutated E. hormaechei SFC3 exhibited excellent resistance to Cd2+ up to the concentration of 1500 μg mL-1. Furthermore, the wild E. hormaechei SFC3 and mutated E. hormaechei SFC3 showed 82.47% and 90.21% of Cd2+ remediation on 6th days of treatment respectively. Similarly, the Cd2+ tolerant wild and mutated E. hormaechei SFC3 showed considerable resistance to all the tested antibiotics. The findings indicate that E. hormaechei SFC3 isolated from KNO₃ processing unit contaminated soil is a promising candidate for microbial remediation of Cd2+ contamination.
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Affiliation(s)
- Haiying Lu
- College of Biology and the Environment, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Changlei Xia
- College of Biology and the Environment, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Arunachalam Chinnathambi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box -2455, Riyadh, 11451, Saudi Arabia
| | - Omaima Nasif
- Department of Physiology, College of Medicine and King Khalid University Hospital, King Saud University, Medical City, PO Box-2925, Riyadh, 11461, Saudi Arabia
| | - Mathiyazhagan Narayanan
- Division of Research and Innovation, Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Science, Chennai, Tamil Nadu, India
| | - Sabarathinam Shanmugam
- Biosystems Engineering, Institute of Forestry and Engineering, Estonian University of Lifescience, Kreutzwaldi 56, 51014, Tartu, Estonia
| | - Nguyen Thuy Lan Chi
- School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Arivalagan Pugazhendhi
- Emerging Materials for Energy and Environmental Applications Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
| | - Ruangwong On-Uma
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, 50200, Thailand; Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Kumchai Jutamas
- Department of Plant Science and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand; Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand
| | - Wongchai Anupong
- Department of Agricultural Economy and Development, Faculty of Agriculture, Chiang Mai University, 50200, Thailand; Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand.
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Rehman HF, Ashraf A, Muzammil S, Siddique MH, Ali T. Assessment of zinc solubilization potential of zinc-resistant Pseudomonas oleovorans strain ZSB13 isolated from contaminated soil. BRAZ J BIOL 2021; 83:e240015. [PMID: 34320047 DOI: 10.1590/1519-6984.240015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/01/2021] [Indexed: 11/22/2022] Open
Abstract
Zinc is an essential micronutrient that is required for optimum plant growth. It is present in soil in insoluble forms. Bacterial solubilization of soil unavailable form of Zn into available form, is an emerging approach to alleviate the Zn deficiency for plants and human beings. Zinc solubilizing bacteria (ZSB) could be a substitute for chemical Zn fertilizer. The present study aimed to isolate and characterize bacterial species from the contaminated soil and evaluate their Zn solubilizing potential. Zn resistant bacteria were isolated and evaluated for their MIC against Zn. Among the 13 isolated bacterial strains ZSB13 showed maximum MIC value upto 30mM/L. The bacterial strain with the highest resistance against Zn was selected for further analysis. Molecular characterization of ZSB13 was performed by 16S rRNA gene amplification which confirmed it as Pseudomonas oleovorans. Zn solubilization was determined through plate assay and broth medium. Four insoluble salts (zinc oxide (ZnO), zinc carbonate (ZnCO3), zinc sulphite (ZnS) and zinc phosphate (Zn3(PO4)2) were used for solubilization assay. Our results shows 11 mm clear halo zone on agar plates amended with ZnO. Likewise, ZSB13 showed significant release of Zn in broth amended with ZnCO3 (17 and 16.8 ppm) and ZnO (18.2 ppm). Furthermore, Zn resistance genes czcD was also enriched in ZSB13. In our study, bacterial strain comprising Zn solubilization potential has been isolated that could be further used for the growth enhancement of crops.
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Affiliation(s)
- H F Rehman
- Government College University, Department of, Zoology, Faisalabad, Pakistan
| | - A Ashraf
- Government College University, Department of, Zoology, Faisalabad, Pakistan
| | - S Muzammil
- Government College University, Department of Microbiology, Faisalabad, Pakistan
| | - M H Siddique
- Government College University, Department of Bioinformatics and Biotechnology, Faisalabad, Pakistan
| | - T Ali
- Government College University, Department of, Zoology, Faisalabad, Pakistan
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