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Dovletyarova EA, Slukovskaya MV, Ivanova TK, Mosendz IA, Novikov AI, Chaporgina AA, Soshina AS, Myazin VA, Korneykova MV, Ettler V, Yáñez C, Neaman A. Sensitivity of microbial bioindicators in assessing metal immobilization success in smelter-impacted soils. CHEMOSPHERE 2024; 359:142296. [PMID: 38729440 DOI: 10.1016/j.chemosphere.2024.142296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 05/06/2024] [Accepted: 05/08/2024] [Indexed: 05/12/2024]
Abstract
While plant toxicity reduction remains the primary metric for judging the success of metal immobilization in soil, the suitability of microorganisms as universal indicators of its effectiveness in various contaminated soils remains a point of contention. This study assessed the sensitivity of microbial bioindicators in monitoring metal immobilization success in smelter-impacted soils. It compared plants and microorganisms as indicators of the efficiency of natural Fe-Mn nodules from the Gulf of Finland in immobilizing metals in soils contaminated by a Ni/Cu smelter, on the Kola Peninsula, Murmansk region, Russia. Perennial ryegrass (Lolium perenne) was grown on nodule-amended and control soils. Plant responses in the smelter-impacted soils proved to be sensitive and robust indicators of successful metal immobilization. However, microbial responses exhibited a more complex story. Despite the observed reductions in soluble metal concentrations, shoot metal contents in ryegrass, and significant improvements in plant growth, certain microbial bioindicators were unresponsive to metal immobilization success brought about by the addition of Fe-Mn nodules. Among microbial bioindicators studied, community-level physiological profiling, microbial biomass carbon, and basal respiration were sensitive indicators of metal immobilization success, whereas the number of saprotrophic, oligotrophic, and Fe-oxidizing bacteria and fungi, the biomass of bacteria and fungi, and enzymatic activity were less robust indicators. Interestingly, the correlations between different microbial responses measured were weak or even negative. Some microbial responses also exhibited negative correlations with plant biomass. These findings underscore the need for further research on comparative evaluations of plants and microorganisms as reliable indicators of metal immobilization efficacy in polluted environments.
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Affiliation(s)
- Elvira A Dovletyarova
- Department of Landscape Design and Sustainable Ecosystems, Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation
| | | | - Tatiana K Ivanova
- Kola Science Centre, Russian Academy of Sciences, Apatity, Russian Federation
| | - Irina A Mosendz
- Kola Science Centre, Russian Academy of Sciences, Apatity, Russian Federation
| | - Andrey I Novikov
- Kola Science Centre, Russian Academy of Sciences, Apatity, Russian Federation
| | | | | | - Vladimir A Myazin
- Kola Science Centre, Russian Academy of Sciences, Apatity, Russian Federation
| | - Maria V Korneykova
- Kola Science Centre, Russian Academy of Sciences, Apatity, Russian Federation
| | - Vojtěch Ettler
- Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Prague, Czech Republic
| | - Carolina Yáñez
- Instituto de Biología, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
| | - Alexander Neaman
- Departamento de Recursos Ambientales, Facultad de Ciencias Agronómicas, Universidad de Tarapacá, Arica, Chile.
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Semenova EM, Tourova TP, Babich TL, Logvinova EY, Sokolova DS, Loiko NG, Myazin VA, Korneykova MV, Mardanov AV, Nazina TN. Crude Oil Degradation in Temperatures Below the Freezing Point by Bacteria from Hydrocarbon-Contaminated Arctic Soils and the Genome Analysis of Sphingomonas sp. AR_OL41. Microorganisms 2023; 12:79. [PMID: 38257905 PMCID: PMC10818417 DOI: 10.3390/microorganisms12010079] [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: 12/13/2023] [Revised: 12/24/2023] [Accepted: 12/28/2023] [Indexed: 01/24/2024] Open
Abstract
Intensive human activity in the Arctic region leads to hydrocarbon pollution of reservoirs and soils. Isolation of bacteria capable of growing at low temperatures and degrading oil and petroleum products is of scientific and practical value. The aim of this work was to study the physiology and growth in oil at temperatures below 0 °C of four strains of bacteria of the genera Pseudomonas, Rhodococcus, Arthrobacter, and Sphingomonas-previously isolated from diesel-contaminated soils of the Franz Josef Land archipelago-as well as genomic analysis of the Sphingomonas sp. AR_OL41 strain. The studied strains grew on hydrocarbons at temperatures from -1.5 °C to 35 °C in the presence of 0-8% NaCl (w/v). Growth at a negative temperature was accompanied by visual changes in the size of cells as well as a narrowing of the spectrum of utilized n-alkanes. The studied strains were psychrotolerant, degraded natural biopolymers (xylan, chitin) and n-alkanes of petroleum, and converted phosphates into a soluble form. The ability to degrade n-alkanes is rare in members of the genus Sphingomonas. To understand how the Sphingomonas sp. AR_OL41 strain has adapted to a cold, diesel-contaminated environment, its genome was sequenced and analyzed. The Illumina HiSeq 2500 platform was used for AR_OL41 genome strain sequencing. The genome analysis of the AR_OL41 strain showed the presence of genes encoding enzymes of n-alkane oxidation, pyruvate metabolism, desaturation of membrane lipids, and the formation of exopolysaccharides, confirming the adaptation of the strain to hydrocarbon pollution and low habitat temperature. Average nucleotide identity and digital DNA-DNA hybridization values for genomes of the AR_OL41 strain with that of the phylogenetically relative Sphingomonas alpine DSM 22537T strain were 81.9% and 20.9%, respectively, which allows the AR_OL41 strain to be assigned to a new species of the genus Sphingomonas. Phenomenological observations and genomic analysis indicate the possible participation of the studied strains in the self-purification of Arctic soils from hydrocarbons and their potential for biotechnological application in bioremediation of low-temperature environments.
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Affiliation(s)
- Ekaterina M. Semenova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
| | - Tatyana P. Tourova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
| | - Tamara L. Babich
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
| | - Ekaterina Y. Logvinova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
| | - Diyana S. Sokolova
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
| | - Nataliya G. Loiko
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
| | - Vladimir A. Myazin
- Institute of North Industrial Ecology Problems–Subdivision of the Federal Research Centre “Kola Science Centre of Russian Academy of Science”, 184209 Apatity, Russia;
- Agrarian and Technological Institute, People’s Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Maria V. Korneykova
- Institute of North Industrial Ecology Problems–Subdivision of the Federal Research Centre “Kola Science Centre of Russian Academy of Science”, 184209 Apatity, Russia;
- Agrarian and Technological Institute, People’s Friendship University of Russia (RUDN University), 117198 Moscow, Russia
| | - Andrey V. Mardanov
- Institute of Bioengineering, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia;
| | - Tamara N. Nazina
- Winogradsky Institute of Microbiology, Research Center of Biotechnology, Russian Academy of Sciences, 119071 Moscow, Russia; (E.M.S.); (T.P.T.); (T.L.B.); (E.Y.L.); (D.S.S.); (N.G.L.)
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