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Huo J, Song B, Riaz M, Song X, Li J, Liu H, Huang W, Jia Q, Wu W. High boron stress leads to sugar beet (Beta vulgaris L.) toxicity by disrupting photosystem Ⅱ. Ecotoxicol Environ Saf 2022; 248:114295. [PMID: 36402074 DOI: 10.1016/j.ecoenv.2022.114295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/28/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
This sugar beet acts as a soil remediator in areas where there are high levels of boron (B) in the soil, since it has a high requirement of boron (B) for growth, and has strong resistance to high B levels. Although B toxicity in different plants has been widely researched, little is known about the response of photosystem II (PSII) activity in sugar beet leaves to B toxicity at present. To clarify the growth and photosynthetic physiological response of sugar beet to B toxicity, the effects of different concentrations of H3BO3 (0.05, 1.5, 2.5,3.5 mM) on the growth, photosynthetic characteristics and antioxidant defense system of sugar beet seedlings were investigated by hydroponic experiments. In the present study, high B stress inhibited the growth of sugar beet and significantly decreased the biomass of the plants. There was a remarkable increase in the accumulation of B in the shoots, which affected photosynthesis and decreased the photosynthetic pigments. As B toxicity increased, leaf PSII activities and maximum photochemical efficiency of PSII (Fv/Fm) showed a tendency to decrease; at the same time, the photosynthetic performance index based on absorbed light energy (PIABS) decreased as well. Meanwhile, the energy allocation parameters of the PSII reaction center were changed, the light energy utilization capacity and the energy used for electron transfer were reduced and the thermal dissipation was increased at the same time. Furthermore, B toxicity decreased catalase (CAT) activity, increased peroxidase (POD) and superoxide dismutase (SOD) activities, and increased malondialdehyde (MDA) accumulation. According to the results obtained in this study, high B concentrations reduced the rate of photosynthesis and fluorescence, thus weakened antioxidant defense systems, and therefore inhibited the growth of sugar beet plants. Thus, in high B areas, sugar beet possesses excellent tolerance to high B levels and has a high B translocation capacity, so it can be used as a phytoremediation tool. This study provides a basis for the feasibility of sugar beet resistant to high B environments.
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Affiliation(s)
- Jialu Huo
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Baiquan Song
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & School of Life Sciences, Heilongjiang University, Harbin 150080, China.
| | - Muhammad Riaz
- College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, PR China
| | - Xin Song
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Jiaxin Li
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Huajun Liu
- Research Institute of Economic Crops, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China.
| | - Wengong Huang
- Safety and Quality Institution of Agricultural Products, Heilongjiang Academy of Agricultural Sciences, Harbin 150086, China
| | - Qiue Jia
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & School of Life Sciences, Heilongjiang University, Harbin 150080, China
| | - Wenyu Wu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & School of Life Sciences, Heilongjiang University, Harbin 150080, China
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Lara P, Vega-Alvarado L, Sahonero-Canavesi DX, Koenen M, Villanueva L, Riveros-Mckay F, Morett E, Juárez K. Transcriptome Analysis Reveals Cr(VI) Adaptation Mechanisms in Klebsiella sp. Strain AqSCr. Front Microbiol 2021; 12:656589. [PMID: 34122372 PMCID: PMC8195247 DOI: 10.3389/fmicb.2021.656589] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/13/2021] [Indexed: 11/19/2022] Open
Abstract
Klebsiella sp. strain AqSCr, isolated from Cr(VI)-polluted groundwater, reduces Cr(VI) both aerobically and anaerobically and resists up 34 mM Cr(VI); this resistance is independent of the ChrA efflux transporter. In this study, we report the whole genome sequence and the transcriptional profile by RNA-Seq of strain AqSCr under Cr(VI)-adapted conditions and found 255 upregulated and 240 downregulated genes compared to controls without Cr(VI) supplementation. Genes differentially transcribed were mostly associated with oxidative stress response, DNA repair and replication, sulfur starvation response, envelope-osmotic stress response, fatty acid (FA) metabolism, ribosomal subunits, and energy metabolism. Among them, genes not previously associated with chromium resistance, for example, cybB, encoding a putative superoxide oxidase (SOO), gltA2, encoding an alternative citrate synthase, and des, encoding a FA desaturase, were upregulated. The sodA gene encoding a manganese superoxide dismutase was upregulated in the presence of Cr(VI), whereas sodB encoding an iron superoxide dismutase was downregulated. Cr(VI) resistance mechanisms in strain AqSCr seem to be orchestrated by the alternative sigma factors fecl, rpoE, and rpoS (all of them upregulated). Membrane lipid analysis of the Cr(IV)-adapted strain showed a lower proportion of unsaturated lipids with respect to the control, which we hypothesized could result from unsaturated lipid peroxidation followed by degradation, together with de novo synthesis mediated by the upregulated FA desaturase-encoding gene, des. This report helps to elucidate both Cr(VI) toxicity targets and global bacterial response to Cr(VI).
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Affiliation(s)
- Paloma Lara
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Leticia Vega-Alvarado
- Instituto de Ciencias Aplicadas y Tecnología, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Diana X Sahonero-Canavesi
- Department of Marine Microbiology and Biogeochemistry (MMB), NIOZ Royal Netherlands Institute for Sea Research, Texel, Netherlands
| | - Michel Koenen
- Department of Marine Microbiology and Biogeochemistry (MMB), NIOZ Royal Netherlands Institute for Sea Research, Texel, Netherlands
| | - Laura Villanueva
- Department of Marine Microbiology and Biogeochemistry (MMB), NIOZ Royal Netherlands Institute for Sea Research, Texel, Netherlands.,Faculty of Geosciences, Department of Earth Sciences, Utrecht University, Utrecht, Netherlands
| | - Fernando Riveros-Mckay
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Enrique Morett
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Katy Juárez
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
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Caldeira JB, Morais PV, Branco R. Exploiting the biological response of two Serratia fonticola strains to the critical metals, gallium and indium. Sci Rep 2020; 10:20348. [PMID: 33230153 PMCID: PMC7683552 DOI: 10.1038/s41598-020-77447-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 11/10/2020] [Indexed: 12/30/2022] Open
Abstract
The use of microorganisms that allows the recovery of critical high-tech elements such as gallium (Ga) and indium (In) has been considered an excellent eco-strategy. In this perspective, it is relevant to understand the strategies of Ga and In resistant strains to cope with these critical metals. This study aimed to explore the effect of these metals on two Ga/In resistant strains and to scrutinize the biological processes behind the oxidative stress in response to exposure to these critical metals. Two strains of Serratia fonticola, A3242 and B2A1Ga1, with high resistance to Ga and In, were submitted to metal stress and their protein profiles showed an overexpressed Superoxide Dismutase (SOD) in presence of In. Results of inhibitor-protein native gel incubations identified the overexpressed enzyme as a Fe-SOD. Both strains exhibited a huge increase of oxidative stress when exposed to indium, visible by an extreme high amount of reactive oxygen species (ROS) production. The toxicity induced by indium triggered biological mechanisms of stress control namely, the decrease in reduced glutathione/total glutathione levels and an increase in the SOD activity. The effect of gallium in cells was not so boisterous, visible only by the decrease of reduced glutathione levels. Analysis of the cellular metabolic viability revealed that each strain was affected differently by the critical metals, which could be related to the distinct metal uptakes. Strain A3242 accumulated more Ga and In in comparison to strain B2A1Ga1, and showed lower metabolic activity. Understanding the biological response of the two metal resistant strains of S. fonticola to stress induced by Ga and In will tackle the current gap of information related with bacteria-critical metals interactions.
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Affiliation(s)
- Joana B Caldeira
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Paula V Morais
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Rita Branco
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal.
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Zhou X, Li J, Wang W, Yang F, Fan B, Zhang C, Ren X, Liang F, Cheng R, Jiang F, Zhou H, Yang J, Tan G, Lyu J, Wang W. Removal of Chromium (VI) by Escherichia coli Cells Expressing Cytoplasmic or Surface-Displayed ChrB: a Comparative Study. J Microbiol Biotechnol 2020; 30:996-1004. [PMID: 32238765 PMCID: PMC9728187 DOI: 10.4014/jmb.1912.12030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/18/2020] [Indexed: 12/15/2022]
Abstract
Various genetically engineered microorganisms have been developed for the removal of heavy metal contaminants. Metal biosorption by whole-cell biosorbents can be enhanced by overproduction of metal-binding proteins/peptides in the cytoplasm or on the cell surface. However, few studies have compared the biosorption capacity of whole cells expressing intracellular or surface-displayed metal-adsorbing proteins. In this study, several constructs were prepared for expressing intracellular and surface-displayed Ochrobactrum tritici 5bvl1 ChrB in Escherichia coli BL21(DE3) cells. E. coli cells expressing surface-displayed ChrB removed more Cr(VI) from aqueous solutions than cells with cytoplasmic ChrB under the same conditions. However, intracellular ChrB was less susceptible to variation in extracellular conditions (pH and ionic strength), and more effectively removed Cr(VI) from industrial wastewater than the surface-displayed ChrB at low pH (<3). An adsorptiondesorption experiment demonstrated that compared with intracellular accumulation, cell-surface adsorption is reversible, which allows easy desorption of the adsorbed metal ions and regeneration of the bioadsorbent. In addition, an intrinsic ChrB protein fluorescence assay suggested that pH and salinity may influence the Cr(VI) adsorption capacity of ChrB-expressing E. coli cells by modulating the ChrB protein conformation. Although the characteristics of ChrB may not be universal for all metal-binding proteins, our study provides new insights into different engineering strategies for whole-cell biosorbents for removing heavy metals from industrial effluents.
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Affiliation(s)
- Xiaofeng Zhou
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Jianghui Li
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Weilong Wang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Fan Yang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Bingqian Fan
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Chenlu Zhang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Xiaojun Ren
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Feng Liang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Rong Cheng
- School of Public Health and Management, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Fengying Jiang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Huaibin Zhou
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Juanjuan Yang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China
| | - Guoqiang Tan
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China,Corresponding authors W.W. Phone: +86-57786699659 Fax: +86-57786689771 E-mail:
| | - Jianxin Lyu
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China,Corresponding authors W.W. Phone: +86-57786699659 Fax: +86-57786689771 E-mail:
| | - Wu Wang
- Zhejiang Provincial Key Laboratory for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang, P.R. China,Corresponding authors W.W. Phone: +86-57786699659 Fax: +86-57786689771 E-mail:
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Yadav S, Villanueva L, Bale N, Koenen M, Hopmans EC, Damsté JSS. Physiological, chemotaxonomic and genomic characterization of two novel piezotolerant bacteria of the family Marinifilaceae isolated from sulfidic waters of the Black Sea. Syst Appl Microbiol 2020; 43:126122. [PMID: 32847788 DOI: 10.1016/j.syapm.2020.126122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 11/17/2022]
Abstract
Diversity analyses of microbial enrichments obtained from deep sulfidic water (2000 m) collected from the Black Sea indicated the presence of eleven novel putative lineages of bacteria affiliated to the family Marinifilaceae of the phylum Bacteroidetes. Pure cultures were obtained for four strains (i.e. M1PT, M3P, A4T and 44) of this family, which could be grouped into two different clades based on their 16S rRNA gene sequences. All four strains were Gram-negative, rod-shaped and facultative anaerobic bacteria. The genomes of all strains were sequenced and physiological analyses were performed. All strains utilized a wide range of carbon sources, which was supported by the presence of the pathways involved in carbon utilization encoded by their genomes. The strains were able to grow at elevated hydrostatic pressure (up to 50 MPa), which coincided with increased production of unsaturated and branched fatty acids, and a decrease in hydroxy fatty acids. Intact polar lipid analysis of all four strains showed the production of ornithine lipids, phosphatidylethanolamines and capnine lipids as major intact polar lipids (IPLs). Genes involved in hopanoid biosynthesis were also identified. However, bacteriohopanepolyols (BHPs) were not detected in the strains. Based on distinct physiological, chemotaxonomic, genotypic and phylogenetic differences compared to other members of the genera Ancylomarina and Labilibaculum, it was concluded that strains M1PT and A4T represented two novel species for which the names Ancylomarina euxinus sp. nov. and Labilibaculum euxinus sp. nov., respectively, are proposed.
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Affiliation(s)
- Subhash Yadav
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands.
| | - Laura Villanueva
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands; Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA Utrecht, The Netherlands
| | - Nicole Bale
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands
| | - Michel Koenen
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands
| | - Ellen C Hopmans
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands
| | - Jaap S Sinninghe Damsté
- NIOZ Royal Netherlands Institute for Sea Research, Department of Marine Microbiology, Biogeochemistry, Utrecht University, P.O. Box 59, 1797AB Den Burg, Texel, The Netherlands; Faculty of Geosciences, Department of Earth Sciences, Utrecht University, P.O. Box 80.021, 3508 TA Utrecht, The Netherlands
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Abstract
Vanadium is a transition metal that has been added recently to the EU list of Raw Critical Metals. The growing needs of vanadium primarily in the steel industry justify its increasing economic value. However, because mining of vanadium sources (i. e. ores, concentrates and vanadiferous slags) is expanding, so is vanadium environmental contamination. Bioleaching comes forth as smart strategy to deal with supply demand and environmental contamination. It requires organisms that are able to mobilize the metal and at the same time are resistant to the leachate generated. Here, we investigated the molecular mechanisms underlying vanadium resistance in Ochrobactrum tritici strains. The highly resistant strain 5bvl1 was able to grow at concentrations > 30 mM vanadate, while the O. tritici type strain only tolerated < 3 mM vanadate concentrations. Screening of O. tritici single mutants (chrA, chrC, chrF and recA) growth during vanadate exposure revealed that vanadate resistance was associated with chromate resistance mechanisms (in particular ChrA, an efflux pump and ChrC, a superoxide dismutase). We also showed that sensitivity to vanadate was correlated with increased accumulation of vanadate intracellularly, while in resistant cells this was not found. Other up-regulated proteins found during vanadate exposure were ABC transporters for methionine and iron, suggesting that cellular responses to vanadate toxicity may also induce changes in unspecific transport and chelation of vanadate.
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Affiliation(s)
- Mariana Cruz Almeida
- CEMMPRE, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Rita Branco
- CEMMPRE, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
| | - Paula V. Morais
- CEMMPRE, Centre for Mechanical Engineering, Materials and Processes, Department of Life Sciences, University of Coimbra, Coimbra, Portugal
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Francisco R, Branco R, Schwab S, Baldani I, Morais PV. Two plant-hosted whole-cell bacterial biosensors for detection of bioavailable Cr(VI). World J Microbiol Biotechnol 2019; 35. [DOI: 10.1007/s11274-019-2703-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 07/26/2019] [Indexed: 10/26/2022]
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Matilda C, Mannully S, Viditha R, Shanthi C. Protein profiling of metal‐resistantBacillus cereusVITSH1. J Appl Microbiol 2019; 127:121-133. [DOI: 10.1111/jam.14293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 04/09/2019] [Accepted: 04/23/2019] [Indexed: 02/04/2023]
Affiliation(s)
- C.S. Matilda
- School of Bio Sciences and Technology Vellore Institute of Technology Vellore India
| | - S.T. Mannully
- School of Bio Sciences and Technology Vellore Institute of Technology Vellore India
| | - R.P. Viditha
- School of Bio Sciences and Technology Vellore Institute of Technology Vellore India
| | - C. Shanthi
- School of Bio Sciences and Technology Vellore Institute of Technology Vellore India
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Zeinali F, Homaei A, Kamrani E, Patel S. Use of Cu/Zn-superoxide dismutase tool for biomonitoring marine environment pollution in the Persian Gulf and the Gulf of Oman. Ecotoxicol Environ Saf 2018; 151:236-241. [PMID: 29353173 DOI: 10.1016/j.ecoenv.2018.01.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 01/09/2018] [Accepted: 01/11/2018] [Indexed: 06/07/2023]
Abstract
Superoxide dismutase (SOD) is the pivotal antioxidant enzyme that defends organisms against the oxidative stresses of superoxide radicals. In this experimental study, purification of SOD from the leaves of Avicennia marina (grey mangrove or white mangrove) from the family Acanthaceae, located in Sirik mangrove forest on the shore of the Gulf of Oman was performed, for the intended characterization of SOD. The Sirik AmSOD (A. marina SOD) expressed optimum activity in the pH range of 6-9 with the maximum activity at pH 8. The optimal temperature for Sirik AmSOD activity was 70°C. Comparison of the pH and temperature optima in two regions (the Persian Gulf and the Gulf of Oman) showed significant differences with P<0.05. The SOD from the Persian Gulf was more resistant against the environmental stressors, because of the biochemical adaption to this environment, which is harsher. The evidence from these results suggests that AmSOD has different characteristics in each place, and mangroves undergo different adaptations and require different protections. The results of the enzymatic research can be useful for ecological management of organisms.
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Affiliation(s)
- Farrokhzad Zeinali
- Department of Marine Biology, Faculty of Sciences, Hormozgan University, Bandarabbas, Iran
| | - Ahmad Homaei
- Department of Biochemistry, Faculty of Sciences, Hormozgan University, Bandarabbas, Iran.
| | - Ehsan Kamrani
- Department of Marine Biology, Faculty of Sciences, Hormozgan University, Bandarabbas, Iran; Fisheries Department, Faculty of Marine Sciences, University of Hormozgan, Bandar Abbas, Iran
| | - Seema Patel
- Bioinformatics and Medical Informatics Research Center, San Diego State University, San Diego 92182, USA
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Francisco R, Branco R, Schwab S, Baldani JI, Morais PV. Impact of plant-associated bacteria biosensors on plant growth in the presence of hexavalent chromium. World J Microbiol Biotechnol 2018; 34. [DOI: 10.1007/s11274-017-2389-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 12/01/2017] [Indexed: 12/18/2022]
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