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Mei S, Bian W, Yang A, Xu P, Qian X, Yang L, Shi X, Niu A. The highly effective cadmium-resistant mechanism of Pseudomonas aeruginosa and the function of pyoverdine induced by cadmium. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:133876. [PMID: 38428299 DOI: 10.1016/j.jhazmat.2024.133876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/04/2024] [Accepted: 02/22/2024] [Indexed: 03/03/2024]
Abstract
Pyoverdine (PVD) plays an important role in reducing cadmium (Cd) accumulation in plants. Some Pseudomonas aeruginosa (P. aeruginosa) species can produce PVD under Cd(Π) stress. However, the function of Cd(Π)-induced PVD remains unclear. In this study, we isolated a highly effective Cd(Π)-resistant P. aeruginosa which can secrete PVD under Cd(Π) stress and found that PVD secretion has a dose-dependent relationship with Cd(Π) concentration. PVD can form a PVD-Cd complex with Cd(Π), though the PVD-Cd complex is unable to be adsorbed by the cell or enter the cell, so the complexation of PVD and Cd(Π) impedes Cd(Π) adsorption on the cell surface and alleviates the oxidative stress, lipid peroxidation, and morphological destruction of the cell caused by Cd(Π) and effectively improves the resistance of P. aeruginosa to Cd(Π). In summary, our research results indicate that the Cd(Π) resistance mechanism of P. aeruginosa screened is the complexation of PVD for Cd(Π) and the adsorption of bacteria for Cd(Π); furthermore, PVD plays an important role in improving the Cd(Π)-resistant ability of bacteria. This study provides a deeper understanding of the highly effective Cd(Π) resistance mechanism of P. aeruginosa and the function of Cd(Π)-induced PVD in bacteria.
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Affiliation(s)
- Shixue Mei
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Wanping Bian
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Aijiang Yang
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Peng Xu
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Xiaoli Qian
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Linping Yang
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Xianrong Shi
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China
| | - Aping Niu
- College of Resources and Environmental Engineering, Guizhou Karst Environmental Ecosystems Observation and Research Station, Ministry of Education, Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang 550025, China.
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Hassen AI, Khambani LS, Pierneef R. Genome sequence of an indole-3-acetic acid and siderophores producing Pseudomonas monsensis SARCC-3054 with the potential as a microbial inoculant for enhanced crop production. Microbiol Resour Announc 2023; 12:e0047923. [PMID: 37526435 PMCID: PMC10508128 DOI: 10.1128/mra.00479-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 07/01/2023] [Indexed: 08/02/2023] Open
Abstract
The genome of Pseudomonas monsensis strain SARCC-3054 was sequenced after being confirmed as a potential plant growth-promoting rhizobacteria in both in vitro and in vivo assays. The 6.3 MB genome has a GC content of 60.2% and is divided into 59 contigs that contain several plant beneficial genes and proteins.
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Affiliation(s)
- Ahmed Idris Hassen
- ARC-Plant Health and Protection, Pretoria, South Africa
- Department of Plant and Soil Sciences, Faculty of Science, Engineering and Agriculture, University of Venda, Thohoyandou, Limpopo, South Africa
| | | | - Rian Pierneef
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Pretoria, South Africa
- Centre for Bioinformatics and Computational Biology, University of Pretoria, Pretoria, South Africa
- SARChI Chair: Marine Microbiomics microbiome@UP, Department of Biochemistry, Genetics and Microbiology, University of Pretoria (UP), Hatfield, Pretoria, South Africa
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Hassen AI, Khambani LS, Swanevelder ZH, Mtsweni NP, Bopape FL, van Vuuren A, van der Linde EJ, Morey L. Elucidating key plant growth-promoting (PGPR) traits in Burkholderia sp. Nafp2/4-1b (=SARCC-3049) using gnotobiotic assays and whole-genome-sequence analysis. Lett Appl Microbiol 2021; 73:658-671. [PMID: 34426983 DOI: 10.1111/lam.13556] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 07/29/2021] [Indexed: 12/01/2022]
Abstract
Burkholderia sp. Nafp2/4-1b (=SARCC-3049) is a plant growth-promoting rhizobacteria (PGPR) initially isolated from the rhizosphere of pristine grassland in South Africa, and its ability to enhance growth was previously evaluated on maize (Zea mays L.). Here, the bacterium was tested with the aim of investigating its role in improving the nodulation and growth of the forage legume lucerne (Medicago sativa L.) when it is co-inoculated with the rhizobial symbionts of this legume in the glasshouse. When the co-inoculation resulted in a statistically significant (P = 0·05) increase in the number of nodules and improved plant biomass compared with single inoculation, we sequenced and analysed its genome to gain a better understanding of the genetic determinants responsible for the observed PGPR traits. The Illumina HiSeq 2500-sequenced genome resulted in 92 scaffolds, with an N50 of 322 407 bp, a total draft genome size of 7 788 045 bp and GC content of 66·2%. Analysis of the genome sequence confirmed the presence of a number of essential genes that code for various PGPR traits. The main plant beneficial genes associated with PGPR traits in Burkholderia sp. Nafp2/4-1b include pyoverdine siderophores biosynthesis gene (PvdF); acdS that codes for 1-aminocyclopropane-1-carboxylate (ACC) deaminase; the tryptophan synthase genes involved in auxin biosynthesis (TSA1, TSB1) and the pqqABCDE operon related to phosphate solubilization. This study generated valuable information on the potential of the PGPR Burkholderia sp. strain Nafp2/4-1b as an effective commercial inoculant, which warrants further formulation and field application studies before developing it into a low cost, environmentally safe and effective biofertilizer.
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Affiliation(s)
- A I Hassen
- Agricultural Research Council, Plant Health and Protection, Pretoria, Queenswood, South Africa
| | - L S Khambani
- School of Molecular and Cell Biology, University of the Witwatersrand, Johannesburg, South Africa
| | - Z H Swanevelder
- Agricultural Research Council, Biotechnology Platform, Onderstepoort, South Africa
| | - N P Mtsweni
- Agricultural Research Council, Plant Health and Protection, Pretoria, Queenswood, South Africa
| | - F L Bopape
- Agricultural Research Council, Plant Health and Protection, Pretoria, Queenswood, South Africa
| | - A van Vuuren
- Agricultural Research Council, Plant Health and Protection, Pretoria, Queenswood, South Africa
| | - E J van der Linde
- Agricultural Research Council, Plant Health and Protection, Pretoria, Queenswood, South Africa
| | - L Morey
- ARC-Biometry, Central Office, Pretoria, South Africa
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Lu K, Jin Q, Lin Y, Lu W, Li S, Zhou C, Jin J, Jiang Q, Ling L, Xiao M. Cell-Free Fermentation Broth of Bacillus velezensis Strain S3-1 Improves Pak Choi Nutritional Quality and Changes the Bacterial Community Structure of the Rhizosphere Soil. Front Microbiol 2020; 11:2043. [PMID: 33071994 PMCID: PMC7533579 DOI: 10.3389/fmicb.2020.02043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 08/03/2020] [Indexed: 11/13/2022] Open
Abstract
Bacillus velezensis is a plant growth-promoting rhizobacteria (PGPR) that has long been proven to improve the growth of plants, and it has been widely used in agriculture. However, in many reports, we observed that during the application of bacterial fluids, it appeared that the effect of the cell-free fermentation broth (CFB) was ignored. The purpose of this study is to compare the effect of the no inoculation treatment (CK), the B. velezensis strain S3-1 treatment (S), the CFB treatment in the Pak choi, soil bacterial community structure, soil enzyme activity, and field soil properties. The results have shown that, compared to the inoculation B. velezensis strain S3-1 treatment and the no-inoculation treatment; the inoculation of the CFB treatment can significantly enhance the soluble protein, soluble solids, ascorbic acid of Pak choi and increase the total phosphorus content and electrical conductivity (EC) in the soil. Based on high-throughput sequencing data, our analysis of soil microbial communities used R, NETWORK, and PICRUSt showed that the CFB treatment can enhance the relative abundance of Acidobacteria in the soil, decrease the abundance of native Bacillus in the soil, change the microbial community structure of the top 50 operational taxonomic units (OTUs), and improve soil microbial carbon metabolism and nitrogen metabolism. Overall, we observed that CFB treatment can also improve plant nutrition and change soil microbial communities. This study provides new insights for the application of microbial fertilizers in agricultural production.
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Affiliation(s)
- Kaiheng Lu
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Qing Jin
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Yibo Lin
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Wenwei Lu
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Songshuo Li
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Chenhao Zhou
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Jieren Jin
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Qiuyan Jiang
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Lichen Ling
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
| | - Ming Xiao
- Shanghai Engineering and Technical Research Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
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