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Li H, Chen S, Wang M, Shi S, Zhao W, Xiong G, Zhou J, Qu J. Phosphate solubilization and plant growth properties are promoted by a lactic acid bacterium in calcareous soil. Appl Microbiol Biotechnol 2024; 108:24. [PMID: 38159115 DOI: 10.1007/s00253-023-12850-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/19/2023] [Accepted: 10/03/2023] [Indexed: 01/03/2024]
Abstract
On the basis of good phosphate solubilization ability of a lactic acid bacteria (LAB) strain Limosilactobacillus sp. LF-17, bacterial agent was prepared and applied to calcareous soil to solubilize phosphate and promote the growth of maize seedlings in this study. A pot experiment showed that the plant growth indicators, phosphorus content, and related enzyme activity of the maize rhizospheric soils in the LF treatment (treated with LAB) were the highest compared with those of the JP treatment (treated with phosphate solubilizing bacteria, PSB) and the blank control (CK). The types of organic acids in maize rhizospheric soil were determined through LC-MS, and 12 acids were detected in all the treatments. The abundant microbes belonged to the genera of Lysobacter, Massilia, Methylbacillus, Brevundimonas, and Limosilactobacillus, and they were beneficial to dissolving phosphate or secreting growth-promoting phytohormones, which were obviously higher in the LF and JP treatments than in CK as analyzed by high-throughput metagenomic sequencing methods. In addition, the abundance values of several enzymes, Kyoto Encyclopedia of Genes and Genomes (KEGG) orthology, and Carbohydrate-Active Enzymes (CAZys), which were related to substrate assimilation and metabolism, were the highest in the LF treatment. Therefore, aside from phosphate-solubilizing microorganisms, LAB can be used as environmentally friendly crop growth promoters in agriculture and provide another viable option for microbial fertilizers. KEY POINTS: • The inoculation of LAB strain effectively promoted the growth and chlorophyll synthesis of maize seedlings. • The inoculation of LAB strain significantly increased the TP content of maize seedlings and the AP concentration of the rhizosphere soil. • The inoculation of LAB strain increased the abundances of the dominant beneficial functional microbes in the rhizosphere soil.
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Affiliation(s)
- Haifeng Li
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China.
| | - Siyuan Chen
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Mengyu Wang
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Shuoshuo Shi
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Wenjian Zhao
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Guoyang Xiong
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Jia Zhou
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
| | - Jianhang Qu
- College of Biological Engineering, Henan University of Technology, Zhengzhou, 450001, China
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Riber L, Carstens AB, Dougherty PE, Roy C, Willenbücher K, Hille F, Franz CMAP, Hansen LH. Pheno- and Genotyping of Three Novel Bacteriophage Genera That Target a Wheat Phyllosphere Sphingomonas Genus. Microorganisms 2023; 11:1831. [PMID: 37513003 PMCID: PMC10385605 DOI: 10.3390/microorganisms11071831] [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: 06/24/2023] [Revised: 07/14/2023] [Accepted: 07/16/2023] [Indexed: 07/30/2023] Open
Abstract
Bacteriophages are viral agents that infect and replicate within bacterial cells. Despite the increasing importance of phage ecology, environmental phages-particularly those targeting phyllosphere-associated bacteria-remain underexplored, and current genomic databases lack high-quality phage genome sequences linked to specific environmentally important bacteria, such as the ubiquitous sphingomonads. Here, we isolated three novel phages from a Danish wastewater treatment facility. Notably, these phages are among the first discovered to target and regulate a Sphingomonas genus within the wheat phyllosphere microbiome. Two of the phages displayed a non-prolate Siphovirus morphotype and demonstrated a narrow host range when tested against additional Sphingomonas strains. Intergenomic studies revealed limited nucleotide sequence similarity within the isolated phage genomes and to publicly available metagenome data of their closest relatives. Particularly intriguing was the limited homology observed between the DNA polymerase encoding genes of the isolated phages and their closest relatives. Based on these findings, we propose three newly identified genera of viruses: Longusvirus carli, Vexovirus birtae, and Molestusvirus kimi, following the latest ICTV binomial nomenclature for virus species. These results contribute to our current understanding of phage genetic diversity in natural environments and hold promising implications for phage applications in phyllosphere microbiome manipulation strategies.
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Affiliation(s)
- Leise Riber
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
| | - Alexander Byth Carstens
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
| | - Peter Erdmann Dougherty
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
| | - Chayan Roy
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
| | - Katharina Willenbücher
- Department of Microbiology and Biotechnology, Max Rubner-Institut, Hermann-Weigmann-Strasse 1, 24103 Kiel, Germany
| | - Frank Hille
- Department of Microbiology and Biotechnology, Max Rubner-Institut, Hermann-Weigmann-Strasse 1, 24103 Kiel, Germany
| | - Charles M A P Franz
- Department of Microbiology and Biotechnology, Max Rubner-Institut, Hermann-Weigmann-Strasse 1, 24103 Kiel, Germany
| | - Lars Hestbjerg Hansen
- Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg, Denmark
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Jiang L, Seo J, Peng Y, Jeon D, Lee JH, Kim CY, Lee J. A nostoxanthin-producing bacterium, Sphingomonas nostoxanthinifaciens sp. nov., alleviates the salt stress of Arabidopsis seedlings by scavenging of reactive oxygen species. Front Microbiol 2023; 14:1101150. [PMID: 36846770 PMCID: PMC9950776 DOI: 10.3389/fmicb.2023.1101150] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 01/18/2023] [Indexed: 02/12/2023] Open
Abstract
A novel, nostoxanthin-producing, endophytic bacterium, designated as AK-PDB1-5T, was isolated from the needle-like leaves of the Korean fir (Abies koreana Wilson) collected from Mt. Halla in Jeju, South Korea. A 16S rRNA sequence comparison indicated that the closest phylogenetic neighbors were Sphingomonas crusticola MIMD3T (95.6%) and Sphingomonas jatrophae S5-249T (95.3%) of the family Sphingomonadaceae. Strain AK-PDB1-5T had a genome size of 4,298,284 bp with a 67.8% G + C content, and digital DNA-DNA hybridization and OrthoANI values with the most closely related species of only 19.5-21% and 75.1-76.8%, respectively. Cells of the strain AK-PDB1-5T were Gram-negative, short rods, oxidase- and catalase-positive. Growth occurred at pH 5.0-9.0 (optimum pH 8.0) in the absence of NaCl at 4-37°C (optimum 25-30°C). Strain AK-PDB1-5T contained C14:0 2OH, C16:0 and summed feature 8 as the major cellular fatty acids (> 10%), while sphingoglycolipid, phosphatidylethanolamine, phosphatidylglycerol, phospholipids and lipids were found to be the major polar lipids. The strain produces a yellow carotenoid pigment; natural products prediction via AntiSMASH tool found zeaxanthin biosynthesis clusters in the entire genome. Biophysical characterization by ultraviolet-visible absorption spectroscopy and ESI-MS studies confirmed the yellow pigment was nostoxanthin. In addition, strain AK-PDB1-5T was found significantly promote Arabidopsis seedling growth under salt conditions by reducing reactive oxygen species (ROS). Based on the polyphasic taxonomic analysis results, strain AK-PDB1-5T was determined to be a novel species in the genus Sphingomonas with the proposed name Sphingomonas nostoxanthinifaciens sp. nov. The type strain is AK-PDB1-5T (= KCTC 82822T = CCTCC AB 2021150T).
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Affiliation(s)
- Lingmin Jiang
- Biological Resource Center, Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Republic of Korea
| | - Jiyoon Seo
- Biological Resource Center, Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Republic of Korea
| | - Yuxin Peng
- Biological Resource Center, Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Republic of Korea
| | - Doeun Jeon
- Biological Resource Center, Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Republic of Korea
| | - Ju Huck Lee
- Biological Resource Center, Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Republic of Korea
| | - Cha Young Kim
- Biological Resource Center, Korean Collection for Type Cultures (KCTC), Korea Research Institute of Bioscience and Biotechnology (KRIBB), Jeongeup, Republic of Korea
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Wang Y, Huang W, Li Y, Yu F, Penttinen P. Isolation, characterization, and evaluation of a high-siderophore-yielding bacterium from heavy metal-contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:3888-3899. [PMID: 34402014 DOI: 10.1007/s11356-021-15996-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Heavy metal-resistant siderophore-producing bacteria (SPB) with plant growth-promoting traits can assist in phytoremediation of heavy metal-contaminated soil. We isolated siderophore-producing bacteria from Pb and Zn mine soil in Shangyu, Zhejiang, China. The isolate with the highest siderophore production, strain SX9, was identified as Burkholderia sp. Burkholderia sp. SX9 produced catecholate-type siderophore, with the highest production at a pH range of 6.0 to 8.0, a temperature range of 20 to 30 °C and NaCl concentration below 2%. Siderophore production was highest without Fe3+ and became gradually lower with increasing Fe3+ concentration. Minimal inhibitory concentrations (MIC) of Pb2+, Zn2+, Cu2+, and Cd2+ were 4000, 22000, 5000, and 2000 μmol L-1, respectively. The strain had a strong metal solubilization ability: the contents of Cu2+, Zn2+, and Cd2+ in the supernatant were 47.4%, 133.0%, and 35.4% higher, respectively, in strain SX9-inoculated cultures than in the not inoculated controls. The siderophore produced by strain SX9 could combine with Fe3+, Zn2+, and Cd2+ with good effectiveness. The plant growth-promoting traits of the strain included indole acetic acid (IAA) production, 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity, and phosphate solubilization capability. Compared to the uninoculated growth medium and SX9 culture supernatant, the germination rate of Lolium perenne seeds was higher when inoculated with strain SX9 culture. In the experiment of seed germination, adding bacterial culture or supernatant could alleviate the toxicity of heavy metals to L. perenne seed germination. Under Cu2+ and Zn2+ stress, strain SX9 promoted the germination rate. Taken together, Burkholderia sp. SX9 had properties beneficial in the microbial enhancement of phytoremediation of soil contaminated with heavy metals.
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Affiliation(s)
- Yajun Wang
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang, 311300, People's Republic of China
| | - Wei Huang
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang, 311300, People's Republic of China
| | - Yaqian Li
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang, 311300, People's Republic of China
| | - Fangbo Yu
- Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, Zhejiang Agriculture and Forestry University, Lin'an, Zhejiang, 311300, People's Republic of China.
| | - Petri Penttinen
- Department of Microbiology, College of Resources, Sichuan Agricultural University, Chengdu, 611130, People's Republic of China.
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5
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Preliminary characterization and phylogeny of sphingomonads occurring on Stone and Pome Fruit Trees in Northern Iran. Biologia (Bratisl) 2021. [DOI: 10.1007/s11756-021-00895-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Patil PD, Singh AA, Yadav GD. Biodegradation of organophosphorus insecticide chlorpyrifos into a major fuel additive 2,4-bis(1,1 dimethylethyl) phenol using white-rot fungal strain Trametes hirsuta MTCC-1171. J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100120] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Zhao T, Hu K, Li J, Zhu Y, Liu A, Yao K, Liu S. Current insights into the microbial degradation for pyrethroids: strain safety, biochemical pathway, and genetic engineering. CHEMOSPHERE 2021; 279:130542. [PMID: 33866100 DOI: 10.1016/j.chemosphere.2021.130542] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 03/09/2021] [Accepted: 04/03/2021] [Indexed: 06/12/2023]
Abstract
As a biologically inspired insecticide, pyrethroids (PYRs) exert evident toxic side effects on non-target organisms. PYRs and their general toxic intermediate 3-phenoxybenzoic acid (3-PBA) have shown high detection rates/levels in human beings recently, for which diet was identified as the major exposure route. Microbial mineralization has emerged as a versatile strategy in addressing such escalating concern. Herein, PYRs and 3-PBA biodegradation with regards to strain safety, application and surfactant were summarized. Numerous PYRs-degrading microbes have been reported yet with a minority focused on 3-PBA. Most isolates were from contaminated sites while several microbial food cultures (MFCs) have been investigated. MFCs such as Bacillus spp. and Aspergillus spp. that dominate in PYRs-degrading microbial pools are applicable candidates for agricultural by-products detoxification during the postharvest process. Subsequently, we discussed committed degradation steps, wherein hydrolase responsible for PYRs ester linkage cleavage and oxygenase for 3-PBA diphenyl ether bond rupture play vital roles. Finally, comprehensive information of the key enzyme genes is outlined along with methodologies concerning gene cloning. Cytochrome P450 monooxygenases (CYP) is competent for diphenyl ether scission. Newly-developed omics has become a feasible gene and enzyme mining technology. To achieve PYRs mineralization in feed and food commodities, the screening of MFCs rich in related enzymes and the construction of MFCs-derived genetically modified microbes (GMMs) exhibit great potential considering the safety issues.
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Affiliation(s)
- Tianye Zhao
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Kaidi Hu
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Jianlong Li
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Yuanting Zhu
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Aiping Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Kai Yao
- College of Biomass Science and Engineering, Sichuan University, Chengdu, 610065, China.
| | - Shuliang Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, 625014, China.
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Wang Q, Huang Q, Guo G, Qin J, Luo J, Zhu Z, Hong Y, Xu Y, Hu S, Hu W, Yang C, Wang J. Reducing bioavailability of heavy metals in contaminated soil and uptake by maize using organic-inorganic mixed fertilizer. CHEMOSPHERE 2020; 261:128122. [PMID: 33113643 DOI: 10.1016/j.chemosphere.2020.128122] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/23/2020] [Accepted: 08/25/2020] [Indexed: 06/11/2023]
Abstract
Heavy metals in soil are harmful to human health via the food chain, but little is known about the mechanism of reducing bioavailability of Cd or Pb to maize (Zea mays L.) by applying complex amendments to soil. A field experiment was conducted at a tropical site in Hainan Province, China, that had been subjected to soil pollution by Cd and Pb from past mining activities. There were ten treatment groups comprising a mixture of biochar, hydroxyapatite (HAP), manure, and plant ash in varying proportions and at three different rates. Compared with untreated soil, all treatments increased pH by 2-3 units in bulk soil or 1-2 units in rhizosphere soil. For all amendments, the concentration of Cd in all parts of maize plants was decreased compared with unamended soil, but this effect was much smaller for Pb. The greatest effect was found with a mixture containing the ratio of HAP:manure:biochar:plant ash as 6:4:2:1 when applied at 20.1 t ha-1. The dominant microbial group in contaminated soil was Proteobacteria. There is evidence that this group can immobilize Cd by mechanisms that include biosorption and bioprecipitation. It was concluded that the mixed amendments containing biochar, HAP, manure, and plant ash can be useful in decreasing Cd uptake by maize. The amendment in this study likely operates through a combination of soil chemical changes and by influencing the soil-microbe-plant interaction.
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Affiliation(s)
- Qingqing Wang
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Qing Huang
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China.
| | - Genmao Guo
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Jiemin Qin
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Junyi Luo
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Zhiqiang Zhu
- Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropic Crops, Hainan University, Haikou, Hainan, 570228, PR China
| | - Yi Hong
- Key Laboratory for Sustainable Utilization of Tropical Bioresources, College of Tropic Crops, Hainan University, Haikou, Hainan, 570228, PR China
| | - Yuxin Xu
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Shan Hu
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Wen Hu
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Chen Yang
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China
| | - Junfeng Wang
- College of Ecology & Environment, Hainan University, Haikou, Hainan, 570228, PR China; State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Center for Eco-Environmental Restoration Engineering of Hainan Province, Hainan University, Haikou, Hainan, 570228, PR China; Key Laboratory for Environmental Toxicology of Haikou, Hainan University, Haikou, Hainan, 570228, PR China.
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Tang J, Lei D, Wu M, Hu Q, Zhang Q. Biodegradation and metabolic pathway of fenvalerate by Citrobacter freundii CD-9. AMB Express 2020; 10:194. [PMID: 33125615 PMCID: PMC7599292 DOI: 10.1186/s13568-020-01128-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 10/15/2020] [Indexed: 12/02/2022] Open
Abstract
Fenvalerate is a pyrethroid insecticide with rapid action, strong targeting, broad spectrum, and high efficiency. However, continued use of fenvalerate has resulted in its widespread presence as a pollutant in surface streams and soils, causing serious environmental pollution. Pesticide residues in the soil are closely related to food safety, yet little is known regarding the kinetics and metabolic behaviors of fenvalerate. In this study, a fenvalerate-degrading microbial strain, CD-9, isolated from factory sludge, was identified as Citrobacter freundii based on morphological, physio-biochemical, and 16S rRNA sequence analysis. Response surface methodology analysis showed that the optimum conditions for fenvalerate degradation by CD-9 were pH 6.3, substrate concentration 77 mg/L, and inoculum amount 6% (v/v). Under these conditions, approximately 88% of fenvalerate present was degraded within 72 h of culture. Based on high-performance liquid chromatography and gas chromatography-mass spectrometry analysis, ten metabolites were confirmed after the degradation of fenvalerate by strain CD-9. Among them, o-phthalaldehyde is a new metabolite for fenvalerate degradation. Based on the identified metabolites, a possible degradation pathway of fenvalerate by C. freundii CD-9 was proposed. Furthermore, the enzyme localization method was used to study CD-9 bacteria and determine that its degrading enzyme is an intracellular enzyme. The degradation rate of fenvalerate by a crude enzyme solution for over 30 min was 73.87%. These results showed that strain CD-9 may be a suitable organism to eliminate environmental pollution by pyrethroid insecticides and provide a future reference for the preparation of microbial degradation agents and environmental remediation.
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Asaf S, Numan M, Khan AL, Al-Harrasi A. Sphingomonas: from diversity and genomics to functional role in environmental remediation and plant growth. Crit Rev Biotechnol 2020; 40:138-152. [PMID: 31906737 DOI: 10.1080/07388551.2019.1709793] [Citation(s) in RCA: 190] [Impact Index Per Article: 47.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The species belonging to the Sphingomonas genus possess multifaceted functions ranging from remediation of environmental contaminations to producing highly beneficial phytohormones, such as sphingan and gellan gum. Recent studies have shown an intriguing role of Sphingomonas species in the degradation of organometallic compounds. However, the actual biotechnological potential of this genus requires further assessment. Some of the species from the genus have also been noted to improve plant-growth during stress conditions such as drought, salinity, and heavy metals in agricultural soil. This role has been attributed to their potential to produce plant growth hormones e.g. gibberellins and indole acetic acid. However, the current literature is scattered, and some of the important areas, such as taxonomy, phylogenetics, genome mapping, and cellular transport systems, are still being overlooked in terms of elucidation of the mechanisms behind stress-tolerance and bioremediation. In this review, we elucidated the prospective role and function of this genus for improved utilization during environmental biotechnology.
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Affiliation(s)
- Sajjad Asaf
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
| | - Muhammad Numan
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
| | - Abdul Latif Khan
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
| | - Ahmed Al-Harrasi
- Natural & Medical Sciences Research Center, University of Nizwa, Nizwa, Oman
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11
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Dada N, Lol JC, Benedict AC, López F, Sheth M, Dzuris N, Padilla N, Lenhart A. Pyrethroid exposure alters internal and cuticle surface bacterial communities in Anopheles albimanus. THE ISME JOURNAL 2019; 13:2447-2464. [PMID: 31171859 PMCID: PMC6776023 DOI: 10.1038/s41396-019-0445-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 05/02/2019] [Accepted: 05/09/2019] [Indexed: 01/19/2023]
Abstract
A deeper understanding of the mechanisms underlying insecticide resistance is needed to mitigate its threat to malaria vector control. Following previously identified associations between mosquito microbiota and insecticide resistance, we demonstrate for the first time, the effects of pyrethroid exposure on the microbiota of F1 progeny of field-collected Anopheles albimanus. Larval and adult mosquitoes were exposed to the pyrethroids alphacypermethrin (only adults), permethrin, and deltamethrin. While there were no significant differences in bacterial composition between insecticide-resistant and insecticide-susceptible mosquitoes, bacterial composition between insecticide-exposed and non-exposed mosquitoes was significantly different for alphacypermethrin and permethrin exposure. Along with other bacterial taxa not identified to species, Pantoea agglomerans (a known insecticide-degrading bacterial species) and Pseudomonas fragi were more abundant in insecticide-exposed compared to non-exposed adults, demonstrating that insecticide exposure can alter mosquito bacterial communities. We also show for the first time that the cuticle surfaces of both larval and adult An. albimanus harbor more diverse bacterial communities than their internal microbial niches. Together, these findings demonstrate how insecticide pressure could be selecting for certain bacteria within mosquitoes, especially insecticide-metabolizing bacteria, thus potentially contributing to insecticide resistance.
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Affiliation(s)
- Nsa Dada
- Entomology Branch, Division of Parasitic Diseases and Malaria, Center for Global Health, United States Centers for Disease Control and Prevention, Atlanta, GA, USA.
- American Society for Microbiology, Washington, DC, USA.
| | - Juan C Lol
- Grupo de Biología y Control de Vectores, Centro de Estudios en Salud, Universidad del Valle de Guatemala, Guatemala, Guatemala
| | - Ana Cristina Benedict
- Grupo de Biología y Control de Vectores, Centro de Estudios en Salud, Universidad del Valle de Guatemala, Guatemala, Guatemala
| | - Francisco López
- Grupo de Biología y Control de Vectores, Centro de Estudios en Salud, Universidad del Valle de Guatemala, Guatemala, Guatemala
| | - Mili Sheth
- Biotechnology Core Facility Branch, Division of Scientific Resources, National Center for Emerging & Zoonotic Infectious Diseases, United States Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Nicole Dzuris
- Entomology Branch, Division of Parasitic Diseases and Malaria, Center for Global Health, United States Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Norma Padilla
- Grupo de Biología y Control de Vectores, Centro de Estudios en Salud, Universidad del Valle de Guatemala, Guatemala, Guatemala
| | - Audrey Lenhart
- Entomology Branch, Division of Parasitic Diseases and Malaria, Center for Global Health, United States Centers for Disease Control and Prevention, Atlanta, GA, USA
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Birolli WG, Arai MS, Nitschke M, Porto ALM. The pyrethroid (±)-lambda-cyhalothrin enantioselective biodegradation by a bacterial consortium. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2019; 156:129-137. [PMID: 31027572 DOI: 10.1016/j.pestbp.2019.02.014] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 02/04/2019] [Accepted: 02/21/2019] [Indexed: 06/09/2023]
Abstract
Chiral pesticides have been used in agriculture, including (±)-lambda-cyhalothrin ((±)-LC), which is a pyrethroid insecticide widely employed on crops for protection against different types of insects. However, enantioselectivity is poorly studied in biodegradation processes. Therefore, the (±)-LC enantioselective biodegradation by bacteria from Brazilian savannah was reported in this study with a validated analytical method. All bacterial strains biodegraded (±)-LC with different efficiencies. Residual concentrations of LC (3.7-43.1% of biodegradation) and its enantiomeric excesses (0-27% ee) were determined. Additionally, the formation of the main biodegradation metabolite 3-phenoxybenzoic acid was also quantified. A Bacillus consortium composed of the three most efficient strains biodegraded more LC than any isolated strain solely employed in this work, showing that the use of a consortium is an interesting approach. In addition, 13 metabolites were identified and a biodegradation pathway with biochemical reactions of hydrolysis, reduction, esterification, amidation, elimination and group transfer were proposed, confirming the bioremediation potential of these strains. The LC stereoisomer with the highest insecticidal activity (1R,3R,αS-enantiomer, also known as gamma-cyhalothrin) was preferentially biodegraded by the studied bacteria. Therefore, crops protection with gamma-cyhalothrin, which can be applied in lower concentrations than (±)-LC because it is a more effective product against insects, may also be biodegraded faster than the racemic mixture in the environment, decreasing the toxic effects on non-target organisms.
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Affiliation(s)
- Willian G Birolli
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, 13563-120, Ed. Química Ambiental, J. Santa Angelina, São Carlos, São Paulo, Brazil.
| | - Marylyn S Arai
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, 13563-120, Ed. Química Ambiental, J. Santa Angelina, São Carlos, São Paulo, Brazil
| | - Marcia Nitschke
- Laboratório de Biotecnologia Microbiana, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, 13563-120, Ed. Química Ambiental, J. Santa Angelina, São Carlos, São Paulo, Brazil
| | - André L M Porto
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, 13563-120, Ed. Química Ambiental, J. Santa Angelina, São Carlos, São Paulo, Brazil
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13
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Feasible and effective reuse of municipal sludge for vegetation restoration: physiochemical characteristics and microbial diversity. Sci Rep 2019; 9:879. [PMID: 30696901 PMCID: PMC6351607 DOI: 10.1038/s41598-018-37338-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 12/05/2018] [Indexed: 11/24/2022] Open
Abstract
The large volume of municipal sludge causes environmental problems in cities worldwide. In this study, municipal sludge, mixed with construction waste residue, was used as substrate to plant Ailanthus altissima. The growth of A. altissima, the substrate characteristics, and substrate microbial diversity were measured to investigate potential recycling and reusing pathways of municipal sludge. The obtained results showed that compared to garden soil, the mixed substrate was weakly alkaline, and had higher nutrient contents, which is beneficial for A. altissima, and results in better growth in mixed substrate. Although the contents of the main heavy metals in the mixed substrate were significantly higher than in garden soil, the values met the criterion of Class II soil in the Environmental Quality Standard for the Soils of China (GB15618-1995). Different substrates showed a variety of microbial diversities. Proteobacteria was the top microbial phylum in all samples, and higher relative abundances were found in samples containing municipal sludge. After growing A. altissima, the relative abundances of Acidobacteria and Gemmatimonadetes increased in the mixed substrate. Therefore, addition of construction waste residue and growth of A. altissima caused a difference. The microbial communities in the mixed substrate with A. altissima are both plant friendly and environmentally friendly. These results suggest this mixed substrate as a potentially feasible and effective pathway for the reuse and recycling of municipal sludge for vegetation restoration.
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Zhang Q, Li S, Ma C, Wu N, Li C, Yang X. Simultaneous biodegradation of bifenthrin and chlorpyrifos by Pseudomonas sp. CB2. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2018; 53:304-312. [PMID: 29431579 DOI: 10.1080/03601234.2018.1431458] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The degradation of bifenthrin (BF) and chlorpyrifos (CP), either together or individually, by a bacterial strain (CB2) isolated from activated sludge was investigated. Strain CB2 was identified as belonging to genus Pseudomonas based on the morphological, physiological, and biochemical characteristics and a homological analysis of the 16S rDNA sequence. Strain CB2 has the potential to degrade BF and CP, either individually or in a mixture. The optimum conditions for mixture degradation were as follows: OD600nm = 0.5; incubation temperature = 30°C; pH = 7.0; BF-CP mixture (10 mg L-1 of each). Under these optimal conditions, the degradation rate constants (and half-lives) were 0.4308 d-1 (1.61 d) and 0.3377 d-1 (2.05 d) for individual BF and CP samples, respectively, and 0.3463 d-1 (2.00 d) and 0.2931 d-1 (2.36 d) for the BF-CP mixture. Major metabolites of BF and CP were 2-methyl-3-biphenylyl methanol and 3,5,6-trichloro-2-pyridinol, respectively. No metabolite bioaccumulation was observed. The ability of CB2 to efficiently degrade BF and CP, particularly in a mixture, may be useful in bioremediation efforts.
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Affiliation(s)
- Qun Zhang
- a Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences , Haikou , China
- b Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture , Haikou , China
| | - Shuhuai Li
- a Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences , Haikou , China
- b Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture , Haikou , China
| | - Chen Ma
- a Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences , Haikou , China
- b Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture , Haikou , China
| | - Nancun Wu
- a Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences , Haikou , China
- b Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture , Haikou , China
| | - Chunli Li
- a Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences , Haikou , China
- b Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture , Haikou , China
| | - Xinfeng Yang
- a Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences , Haikou , China
- b Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture , Haikou , China
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Tang J, Liu B, Shi Y, Zeng CY, Chen TT, Zeng L, Zhang Q. Isolation, identification, and fenvalerate-degrading potential of Bacillus licheniformis CY-012. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1438210] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Jie Tang
- Key Laboratory of Food Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, Sichuan, PR China
| | - Bo Liu
- Key Laboratory of Food Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, Sichuan, PR China
| | - Ying Shi
- Meishan Product Quality Supervision and Inspection Institute, Meishan, Sichuan, PR China
| | - Chao-yi Zeng
- Key Laboratory of Food Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, Sichuan, PR China
| | - Ting-ting Chen
- Key Laboratory of Food Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, Sichuan, PR China
| | - Lin Zeng
- Key Laboratory of Food Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, Sichuan, PR China
| | - Qing Zhang
- Key Laboratory of Food Biotechnology, School of Food and Biotechnology, Xihua University, Chengdu, Sichuan, PR China
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Zhao Q, Yue S, Bilal M, Hu H, Wang W, Zhang X. Comparative genomic analysis of 26 Sphingomonas and Sphingobium strains: Dissemination of bioremediation capabilities, biodegradation potential and horizontal gene transfer. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 609:1238-1247. [PMID: 28787798 DOI: 10.1016/j.scitotenv.2017.07.249] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 07/27/2017] [Accepted: 07/28/2017] [Indexed: 05/12/2023]
Abstract
Bacteria belonging to the genera Sphingomonas and Sphingobium are known for their ability to catabolize aromatic compounds. In this study, we analyzed the whole genome sequences of 26 strains in the genera Sphingomonas and Sphingobium to gain insight into dissemination of bioremediation capabilities, biodegradation potential, central pathways and genome plasticity. Phylogenetic analysis revealed that both Sphingomonas sp. strain BHC-A and Sphingomonas paucimobilis EPA505 should be placed in the genus Sphingobium. The bph and xyl gene cluster was found in 6 polycyclic aromatic hydrocarbons-degrading strains. Transposase and IS coding genes were found in the 6 gene clusters, suggesting the mobility of bph and xyl gene clusters. β-ketoadipate and homogentisate pathways were the main central pathways in Sphingomonas and Sphingobium strains. A large number of oxygenase coding genes were predicted in the 26 genomes, indicating a huge biodegradation potential of the Sphingomonas and Sphingobium strains. Horizontal gene transfer related genes and prophages were predicted in the analyzed strains, suggesting the ongoing evolution and shaping of the genomes. Analysis of the 26 genomes in this work contributes to the understanding of dispersion of bioremediation capabilities, bioremediation potential and genome plasticity in strains belonging to the genera Sphingomonas and Sphingobium.
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Affiliation(s)
- Qiang Zhao
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shengjie Yue
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Muhammad Bilal
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Hongbo Hu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China; National Experimental Teaching Center for Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Wei Wang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xuehong Zhang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
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Aerobic degradation of fenvalerate by a Gram-positive bacterium, Bacillus flexus strain XJU-4. 3 Biotech 2017; 7:320. [PMID: 28955617 DOI: 10.1007/s13205-017-0957-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 09/07/2017] [Indexed: 10/18/2022] Open
Abstract
Synthetic pyrethroid-fenvalerate-is one of the most widespread toxic pollutants and has adverse effect on living systems. However, little is known about its biotransformation mechanism in different microorganisms. To elucidate the pathway that might be involved in the catabolism of fenvalerate, we used Bacillus flexus strain XJU-4 (3-nitrobenzoate degrading organism) as an ideal fenvalerate degrading bacterium. Thin layer chromatography, high performance liquid chromatography and gas chromatography-mass spectrometry analysis results revealed that 3-phenoxybenzoate, protocatechuate, and catechol are the three main by-products of fenvalerate metabolism. Additionally, the bacterial cell-free enzymes showed the activities of fenvalerate hydrolyzing esterase, 3-phenoxybenzaldehyde dehydrogenase, 3-phenoxybenzoate dioxygenase, phenol hydroxylase, protocatechuate 2,3-dioxygenase and catechol-2,3-dioxygenase. Thus, in strain XJU-4, protocatechuate and catechol were further metabolized through meta-cleavage pathway. Moreover, laboratory-scale soil experiments results suggest that B. flexus strain XJU-4 is a suitable contender for bioremediation of pyrethroid fenvalerate-contaminated sites.
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Response of soil microbial community to application of biochar in cotton soils with different continuous cropping years. Sci Rep 2017; 7:10184. [PMID: 28860603 PMCID: PMC5578980 DOI: 10.1038/s41598-017-10427-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 08/09/2017] [Indexed: 12/01/2022] Open
Abstract
The bacterial community in soils of cotton that have continuously been cropped for 2 years, 6 years, 11 years and 14 years and treated with biochar (B0, 0 t·ha−1; B1, 12.5 t·ha−1; and B2, 20 t·ha−1) was investigated using next-generation sequencing. Of the 45 bacterial genera (relative abundance ratio of genera greater than 0.3%), 21 genera were affected (p < 0.05) by the biochar treatment, whereas 20 genera were affected by the continuous cropping. Between the soils that have been continuously cropped for 2 years and 14 years, 12 different genera were significantly observed (p < 0.05), and 6 genera belonged to the phylum Acidobacteria. The relative abundance of Sphingomonas and Pseudomonas in the biochar-treated soils was significantly higher than that in the soil without biochar treatment (p < 0.05), and the relative abundance of Sphingomonas and Pseudomonas in soils that have been continuously cropped for 2 years and 6 years was significantly higher than that in the soils continuously cropped for 11 years and 14 years (p < 0.05). The results suggest that the biochar application has a significant impact on the soil bacterial community, which may improve the microbial diversity of continuous cropping systems in cotton soils.
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20
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Pérez M, Rueda OD, Bangeppagari M, Johana JZ, Ríos D, Rueda BB, Sikandar IM, Naga RM. Evaluation of various pesticides-degrading pure bacterial cultures isolated from pesticide-contaminated soils in Ecuador. ACTA ACUST UNITED AC 2016. [DOI: 10.5897/ajb2016.15418] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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21
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Birolli WG, Alvarenga N, Seleghim MHR, Porto ALM. Biodegradation of the Pyrethroid Pesticide Esfenvalerate by Marine-Derived Fungi. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2016; 18:511-520. [PMID: 27381569 DOI: 10.1007/s10126-016-9710-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Accepted: 05/31/2016] [Indexed: 06/06/2023]
Abstract
Esfenvalerate biodegradation by marine-derived fungi is reported here. Esfenvalerate (S,S-fenvalerate) and its main metabolites [3-phenoxybenzaldehyde (PBAld), 3-phenoxybenzoic acid (PBAc), 3-phenoxybenzyl alcohol (PBAlc), and 2-(4-chlorophenyl)-3-methylbutyric acid (CLAc)] were quantitatively analyzed by a validated method in triplicate experiments. All the strains (Penicillium raistrickii CBMAI 931, Aspergillus sydowii CBMAI 935, Cladosporium sp. CBMAI 1237, Microsphaeropsis sp. CBMAI 1675, Acremonium sp. CBMAI 1676, Westerdykella sp. CBMAI 1679, and Cladosporium sp. CBMAI 1678) were able to degrade esfenvalerate, however, with different efficiencies. Initially, 100 mg L(-1) esfenvalerate (Sumidan 150SC) was added to each culture in 3 % malt liquid medium. Residual esfenvalerate (64.8-95.2 mg L(-1)) and the concentrations of PBAc (0.5-7.4 mg L(-1)), ClAc (0.1-7.5 mg L(-1)), and PBAlc (0.2 mg L(-1)) were determined after 14 days. In experiments after 7, 14, 21, and 28 days of biodegradation with the three most efficient strains, increasing concentrations of the toxic compounds PBAc (2.7-16.6 mg L(-1), after 28 days) and CLAc (6.6-13.4 mg L(-1), after 28 days) were observed. A biodegradation pathway was proposed, based on HPLC-ToF results. The biodegradation pathway includes PBAld, PBAc, PBAlc, ClAc, 2-hydroxy-2-(3-phenoxyphenyl)acetonitrile, 3-(hydroxyphenoxy)benzoic acid, and methyl 3-phenoxy benzoate. Marine-derived fungi were able to biodegrade esfenvalerate in a commercial formulation and showed their potential for future bioremediation studies in contaminated soils and water bodies.
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Affiliation(s)
- Willian G Birolli
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Ed. Química Ambiental, J. Santa Angelina, 13563-120, São Carlos, SP, Brazil
| | - Natália Alvarenga
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Ed. Química Ambiental, J. Santa Angelina, 13563-120, São Carlos, SP, Brazil
| | - Mirna H R Seleghim
- Departamento de Ecologia e Biologia Evolutiva, Universidade Federal de São Carlos, Via Washington Luís, Km 235, 13565-905, São Carlos, SP, Brazil
| | - André L M Porto
- Laboratório de Química Orgânica e Biocatálise, Instituto de Química de São Carlos, Universidade de São Paulo, Av. João Dagnone, 1100, Ed. Química Ambiental, J. Santa Angelina, 13563-120, São Carlos, SP, Brazil.
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Kaur G, Sharma R, Singh K, Sharma PK. Delineating bacterial community structure of polluted soil samples collected from cancer prone belt of Punjab, India. 3 Biotech 2015; 5:727-734. [PMID: 28324527 PMCID: PMC4569629 DOI: 10.1007/s13205-014-0270-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 12/13/2014] [Indexed: 11/01/2022] Open
Abstract
16S rRNA gene analysis has emerged as one of the valuable tools that are being utilized in investigating the molecular phylogenetic structure of the particular environment. Here, we embarked upon understanding and delineating the molecular phylogeny structure of microbes in polluted soil samples from cancer prone belt of the Punjab, India, which is highly contaminated with herbicide, pesticide and heavy metals. To investigate the bacterial phylogeny structure, a high-molecular weight metagenomic DNA was extracted from the soil samples, followed by PCR amplification, cloning and analysis of the 16S rRNA genes. Study employing 16S rRNA profiling of the community DNA revealed the presence of two major phylums: the Proteobacteria (26.7 %), the Bacteroidetes (11.2 %), and several minor groups, i.e., Acidobacteria (4.2 %), Actinobacteria (4.2 %), Firmicutes (2.8 %), Verrucomicrobia (2.8 %), Gemmatimonadetes (1.4 %) and Chloroflexi (1.4 %). Among the Proteobacteria, we mainly observed the α-Proteobacteria (18.3 %). Nearly, 38 % of the recovered 16S rRNA gene sequences in this study do not share similarity with known culturable bacterial sequences reported in the genebank data base and hence considered to be novel. More interestingly, 16S rRNA gene sequences of archaeal origin (7.0 %) were also recovered that primarily indicate change in their evolution pattern. A phylogenetic tree constructed based on alignment-dependent method revealed the extent of similarity these clones shared with each other, followed by alignment-independent methods that statistically confirmed the sequence variation among the clones. Despite the high level of contamination in the study area, we observed remarkable microbial diversity that mainly includes the Gram-negative bacteria. The presence of more Gram-negative bacteria indicates that they have evolved a robust mechanism to resist and cope up with these pollutants compared to Gram-positive groups. Investigation of the polluted soil samples employing culture-independent approach revealed important bacterial groups which could be engineered for future bioremediation studies.
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Affiliation(s)
- Gagandeep Kaur
- Department of Biotechnology, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Pb, India
| | | | - Kashmir Singh
- Department of Biotechnology, Panjab University, Chandigarh, India
| | - Pushpender K Sharma
- Department of Biotechnology, Sri Guru Granth Sahib World University, Fatehgarh Sahib, Pb, India.
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Song H, Zhou Z, Liu Y, Deng S, Xu H. Kinetics and Mechanism of Fenpropathrin Biodegradation by a Newly Isolated Pseudomonas aeruginosa sp. Strain JQ-41. Curr Microbiol 2015; 71:326-32. [PMID: 26068594 DOI: 10.1007/s00284-015-0852-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 04/28/2015] [Indexed: 10/23/2022]
Abstract
A soil bacterium designated strain JQ-41, capable of growth on fenpropathrin as the sole carbon source and energy source, was isolated from a long-term pyrethroid insecticide-treated orchard. Based on the morphology, physio-biochemical characteristics, and 16S rDNA gene analysis, as well as the G+C content of the genomic DNA, the strain JQ-41 was identified as Pseudomonas aeruginosa. Up to 92.3% of 50 mg l(-1) fenpropathrin was degraded by P. aeruginosa strain at 30°C and pH 7 within 7 days. The kinetic parameters q max, K s, and K i were established to be 1.14 day(-1), 38.41 mg l(-1), and 137.67 mg l(-1), respectively, and the critical inhibitor concentration was determined to be 72.72 mg l(-1). Cell surface hydrophobicity of P. aeruginosa strain was enhanced during growth on fenpropathrin. Three metabolites from fenpropathrin degradation were identified by gas chromatography mass spectrometry, and then a possible degradation pathway was proposed. In addition, this isolate was also able to degrade a wide range of synthetic pyrethroid insecticides including cypermethrin, deltamethrin, bifenthrin, and cyhalothrin with the degradation process following the first-order kinetic model. Taken together, our results provide insights into the kinetics and mechanism of fenpropathrin degradation by P. aeruginosa strain and also highlight its promising potential in bioremediation of pyrethroid-contaminated environment.
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Affiliation(s)
- Haihai Song
- Key Laboratory of Bio-Resources and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610064, China
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Deng W, Lin D, Yao K, Yuan H, Wang Z, Li J, Zou L, Han X, Zhou K, He L, Hu X, Liu S. Characterization of a novel β-cypermethrin-degrading Aspergillus niger YAT strain and the biochemical degradation pathway of β-cypermethrin. Appl Microbiol Biotechnol 2015; 99:8187-98. [PMID: 26022858 DOI: 10.1007/s00253-015-6690-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 05/08/2015] [Accepted: 05/12/2015] [Indexed: 12/23/2022]
Abstract
Aspergillus niger YAT strain was obtained from Chinese brick tea (Collection number: CGMCC 10,568) and identified on the basis of morphological characteristics and internal transcribed spacer (ITS) sequence. The strain could degrade 54.83 % of β-cypermethrin (β-CY; 50 mg L(-1)) in 7 days and 100 % of 3-phenoxybenzoic acid (3-PBA; 100 mg L(-1)) in 22 h. The half-lives of β-CY and 3-PBA range from 3.573 to 11.748 days and from 5.635 to 12.160 h, respectively. The degradation of β-CY and 3-PBA was further described using first-order kinetic models. The pathway and mechanism of β-CY degraded by YAT were investigated by analyzing the degraded metabolites through high-performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC-MS). Relevant enzymatic activities and substrate utilization were also investigated. β-CY degradation products were analyzed. Results indicated that YAT strain transformed β-CY into 3-PBA. 3-PBA was then gradually transformed into permethric acid, protocatechuic acid, 3-hydroxy-5-phenoxy benzoic acid, gallic acid, and phenol gradually. The YAT strain can also effectively degrade these metabolites. The results indicated that YAT strain has potential applications in bioremediation of pyrethroid insecticide (PI)-contaminated environments and fermented food.
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Affiliation(s)
- Weiqin Deng
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, 625014, People's Republic of China
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Yi W, Zhibang Y, Lili Z, Zhongquan S, Lianju M, Ziwei T, Renju J. Isolation and identification of dexamethasone sodium phosphate degradingPseudomonas alcaligenes. J Basic Microbiol 2014; 55:262-8. [PMID: 25284640 DOI: 10.1002/jobm.201300912] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Accepted: 08/12/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Wang Yi
- Department of Immunology, School of Basic Medical Sciences; Chongqing Medical University; Chongqing P. R. China
| | - Yang Zhibang
- Department of Pathogenic Biology, School of Basic Medical Sciences; Chongqing Medical University; Chongqing P. R. China
| | - Zhu Lili
- Department of Pathogenic Biology, School of Basic Medical Sciences; Chongqing Medical University; Chongqing P. R. China
| | - Shi Zhongquan
- Department of Pathogenic Biology, School of Basic Medical Sciences; Chongqing Medical University; Chongqing P. R. China
| | - Ma Lianju
- Department of Pharmacal Teaching Center; Chongqing Medical University; Chongqing P. R. China
| | - Tang Ziwei
- Department of Clinical Medicine, West China School of Medicine; Sichuan University; Chengdu P. R. China
| | - Jiang Renju
- Department of Pathogenic Biology, School of Basic Medical Sciences; Chongqing Medical University; Chongqing P. R. China
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Khan AL, Waqas M, Kang SM, Al-Harrasi A, Hussain J, Al-Rawahi A, Al-Khiziri S, Ullah I, Ali L, Jung HY, Lee IJ. Bacterial endophyte Sphingomonas sp. LK11 produces gibberellins and IAA and promotes tomato plant growth. J Microbiol 2014; 52:689-95. [PMID: 24994010 DOI: 10.1007/s12275-014-4002-7] [Citation(s) in RCA: 191] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 05/12/2014] [Accepted: 05/14/2014] [Indexed: 11/27/2022]
Abstract
Plant growth promoting endophytic bacteria have been identified as potential growth regulators of crops. Endophytic bacterium, Sphingomonas sp. LK11, was isolated from the leaves of Tephrosia apollinea. The pure culture of Sphingomonas sp. LK11 was subjected to advance chromatographic and spectroscopic techniques to extract and isolate gibberellins (GAs). Deuterated standards of [17, 17-(2)H2]-GA4, [17, 17-(2)H2]-GA9 and [17, 17-(2)H2]-GA20 were used to quantify the bacterial GAs. The analysis of the culture broth of Sphingomonas sp. LK11 revealed the existence of physiologically active gibberellins (GA4: 2.97 ± 0.11 ng/ml) and inactive GA9 (0.98 ± 0.15 ng/ml) and GA20 (2.41 ± 0.23). The endophyte also produced indole acetic acid (11.23 ± 0.93 μM/ml). Tomato plants inoculated with endophytic Sphingomonas sp. LK11 showed significantly increased growth attributes (shoot length, chlorophyll contents, shoot, and root dry weights) compared to the control. This indicated that such phyto-hormones-producing strains could help in increasing crop growth.
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Affiliation(s)
- Abdul Latif Khan
- Department of Biological Sciences and Chemistry, University of Nizwa, Nizwa, Oman
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Yu FB, Li XD, Ali SW, Shan SD, Luo LP, Guan LB. Further characterization of o-nitrobenzaldehyde degrading bacterium Pseudomonas sp. ONBA-17 and deduction on its metabolic pathway. Braz J Microbiol 2014; 45:1303-8. [PMID: 25763034 PMCID: PMC4323303 DOI: 10.1590/s1517-83822014000400021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 04/17/2014] [Indexed: 11/21/2022] Open
Abstract
A previously reported o-nitrobenzaldehyde (ONBA) degrading bacterium Pseudomonas sp. ONBA-17 was further identified and characterized. Based on results of DNA base composition and DNA-DNA hybridization, the strain was identified as P. putida. Its degradation effect enhanced with increase of inoculum amount and no lag phase was observed. Higher removal rate was achieved under shaking conditions. All tested ONBA with different initial concentrations could be completely degraded within 5 d. In addition, degradative enzyme(s) involved was confirmed as intra-cellular distributed and constitutively expressed. Effects of different compounds on relative activity of degradative enzyme(s) within cell-free extract were also evaluated. Finally, 2-nitrobenzoic acid and 2, 3-dihydroxybenzoic acid were detected as metabolites of ONBA degradation by P. putida ONBA-17, and relevant metabolic pathway was preliminary proposed. This study might help with future research in better understanding of nitroaromatics biodegradation.
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Affiliation(s)
- Fang-Bo Yu
- Department of Environmental Sciences Zhejiang Agricultural and Forestry University Linan China Department of Environmental Sciences, Zhejiang Agricultural and Forestry University, Linan, China
| | - Xiao-Dan Li
- Institute of Botany Jiangsu Province and Chinese Academy of Sciences Nanjing China Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, China
| | - Shinawar Waseem Ali
- Institute of Agricultural Sciences University of the Punjab Lahore Pakistan Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
| | - Sheng-Dao Shan
- Department of Environmental Sciences Zhejiang Agricultural and Forestry University Linan China Department of Environmental Sciences, Zhejiang Agricultural and Forestry University, Linan, China
| | - Lin-Ping Luo
- Department of Environmental Sciences Zhejiang Agricultural and Forestry University Linan China Department of Environmental Sciences, Zhejiang Agricultural and Forestry University, Linan, China
| | - Li-Bo Guan
- Department of Environmental Sciences Zhejiang Agricultural and Forestry University Linan China Department of Environmental Sciences, Zhejiang Agricultural and Forestry University, Linan, China
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