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Aytenov IS, Bozorov TA, Zhang D, Samadiy SA, Muhammadova DA, Isokulov MZ, Murodova SM, Zakirova OR, Chinikulov BK, Sherimbetov AG. Uncovering the Antifungal Potential of Plant-Associated Cultivable Bacteria from the Aral Sea Region against Phytopathogenic Fungi. Pathogens 2024; 13:585. [PMID: 39057812 PMCID: PMC11279601 DOI: 10.3390/pathogens13070585] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 07/11/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Two freshwater rivers, the Amu Darya and Syr Darya, flow into the Aral Sea, but they began to diminish in the early 1960s, and by the 1980s, the lake had nearly ceased to exist due to excessive water consumption for agriculture and the unsustainable management of water resources from rivers, which transformed the Aral Sea into a hypersaline lake. Despite this, the flora and fauna of the region began to evolve in the high-salinity seabed soil, which has received little attention in studies. In this study, we isolated approximately 1400 bacterial strains from the rhizosphere and phyllosphere of plant species of distinct families. Bacterial isolates were examined for antifungal activities against a range of pathogenic fungi such as Rhizoctonia gossypii, Trichothecium ovalisporum, Fusarium annulatum, F. oxysporum, F. culmorum, F. brachygibbosum, F. tricinctum, F. verticillioides, Alternaria alternata, A. terreus, Aspergillus niger, and As. flavus. Eighty-eight bacterial isolates exhibited varying antagonistic ability against pathogenic fungi. Furthermore, DNA barcoding of isolates using the 16S rRNA gene indicated that most antagonistic bacteria belonged to the Bacillus and Pseudomonas genera. The study also explored the activity of hydrolytic and cell-wall-degrading enzymes produced by antagonistic bacteria. The findings revealed that antagonistic bacteria can be utilized to widely protect seabed plants and plants growing in saline areas against pathogenic fungi, as well as agricultural crops.
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Affiliation(s)
- Ilkham S. Aytenov
- Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (I.S.A.); (D.Z.)
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Tohir A. Bozorov
- Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (I.S.A.); (D.Z.)
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Daoyuan Zhang
- Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Key Laboratory of Conservation and Utilization of Plant Gene Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; (I.S.A.); (D.Z.)
| | - Sitora A. Samadiy
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
- Department of Microbiology and Biotechnology, National University of Uzbekistan, University Street, 4, Tashkent 100174, Uzbekistan
| | - Dono A. Muhammadova
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Marufbek Z. Isokulov
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Sojida M. Murodova
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Ozoda R. Zakirova
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Bakhodir Kh. Chinikulov
- Laboratory of Molecular and Biochemical Genetics, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan; (S.A.S.); (D.A.M.); (S.M.M.)
| | - Anvar G. Sherimbetov
- Laboratory of Plant Immunity, Institute of Genetics and Plants Experimental Biology, Uzbek Academy of Sciences, Kibray 111226, Uzbekistan
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2
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Liu X, Zhong L, Yang R, Wang H, Liu X, Xue W, Yang H, Shen Y, Li J, Sun Z. Modifying soil bacterial communities in saline mudflats with organic acids and substrates. Front Microbiol 2024; 15:1392441. [PMID: 38706968 PMCID: PMC11066327 DOI: 10.3389/fmicb.2024.1392441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 04/11/2024] [Indexed: 05/07/2024] Open
Abstract
Aims The high salinity of soil, nutrient scarcity, and poor aggregate structure limit the exploitation and utilization of coastal mudflat resources and the sustainable development of saline soil agriculture. In this paper, the effects of applying exogenous organic acids combined with biological substrate on the composition and diversity of soil bacterial community were studied in moderately saline mudflats in Jiangsu Province. Methods A combination of three exogenous organic acids (humic acid, fulvic acid, and citric acid) and four biological substrates (cottonseed hull, cow manure, grass charcoal, and pine needle) was set up set up on a coastal saline mudflat planted with a salt-tolerant forage grass, sweet sorghum. A total of 120 kg ha-1 of organic acids and 5,000 kg ha-1 of substrates were used, plus two treatments, CK without application of organic acids and substrates and CK0 in bare ground, for a total of 14 treatments. Results No significant difference was found in the alpha diversity of soil bacterial community among all treatments (p ≥ 0.05), with the fulvic acid composite pine needle (FPN) treatment showing the largest increase in each index. The beta diversity differed significantly (p < 0.05) among all treatments, and the difference between citric acid-grass charcoal (CGC) and CK treatments was greater than that of other treatments. All treatments were effective in increasing the number of bacterial ASVs and affecting the structural composition of the community. Citric acid-cow manure (CCM), FPN, and CGC treatments were found to be beneficial for increasing the relative abundance of Proteobacteria, Chloroflexi, and Actinobacteria, respectively. By contrast, all treatments triggered a decrease in the relative abundance of Acidobacteria. Conclusion Among the 12 different combinations of exogenous organic acid composite biomass substrates applied to the coastal beach, the CGC treatment was more conducive to increasing the relative abundance of the salt-tolerant bacteria Proteobacteria, Chloroflexi and Actinobacteria, and improving the community structure of soil bacteria. The FPN treatment was more conducive to increase the species diversity of the soil bacterial community and adjust the species composition of the bacterial community.
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Affiliation(s)
- Xiaoyu Liu
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Liang Zhong
- School of Life Science, Nanjing University, Nanjing, China
| | - Ruixue Yang
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Huiyan Wang
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Xinbao Liu
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Wei Xue
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - He Yang
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Yixin Shen
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
| | - Jianlong Li
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
- School of Life Science, Nanjing University, Nanjing, China
| | - Zhengguo Sun
- College of Agro-grassland Science, Nanjing Agricultural University, Nanjing, China
- Nanjing University (Suzhou) High and New Technology Research Institute, Suzhou, China
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3
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Solchaga JI, Busalmen JP, Nercessian D. Unraveling Anaerobic Metabolisms in a Hypersaline Sediment. Front Microbiol 2022; 13:811432. [PMID: 35369499 PMCID: PMC8966722 DOI: 10.3389/fmicb.2022.811432] [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: 11/08/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
The knowledge on the microbial diversity inhabiting hypersaline sediments is still limited. In particular, existing data about anaerobic hypersaline archaea and bacteria are scarce and refer to a limited number of genera. The approach to obtain existing information has been almost exclusively attempting to grow every organism in axenic culture on the selected electron acceptor with a variety of electron donors. Here, a different approach has been used to interrogate the microbial community of submerged hypersaline sediment of Salitral Negro, Argentina, aiming at enriching consortia performing anaerobic respiration of different electron acceptor compounds, in which ecological associations can maximize the possibilities of successful growth. Growth of consortia was demonstrated on all offered electron acceptors, including fumarate, nitrate, sulfate, thiosulfate, dimethyl sulfoxide, and a polarized electrode. Halorubrum and Haloarcula representatives are here shown for the first time growing on lactate, using fumarate or a polarized electrode as the electron acceptor; in addition, they are shown also growing in sulfate-reducing consortia. Halorubrum representatives are for the first time shown to be growing in nitrate-reducing consortia, probably thanks to reduction of N2O produced by other consortium members. Fumarate respiration is indeed shown for the first time supporting growth of Halanaeroarchaeum and Halorhabdus belonging to the archaea, as well as growth of Halanaerobium, Halanaerobaculum, Sporohalobacter, and Acetohalobium belonging to the bacteria. Finally, evidence is presented suggesting growth of nanohaloarchaea in anaerobic conditions.
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Affiliation(s)
- Juan Ignacio Solchaga
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata - CONICET, Mar del Plata, Argentina
| | - Juan Pablo Busalmen
- Laboratorio de Bioelectroquímica, INTEMA - CONICET, Universidad Nacional de Mar del Plata, Mar del Plata, Argentina
| | - Débora Nercessian
- Instituto de Investigaciones Biológicas, Universidad Nacional de Mar del Plata - CONICET, Mar del Plata, Argentina
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Sadeepa D, Sirisena K, Manage PM. Diversity of microbial communities in hot springs of Sri Lanka as revealed by 16S rRNA gene high-throughput sequencing analysis. Gene 2021; 812:146103. [PMID: 34896522 DOI: 10.1016/j.gene.2021.146103] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 11/01/2021] [Accepted: 11/16/2021] [Indexed: 01/16/2023]
Abstract
Characterization of hot spring microbiota is useful as an initial platform for exploring industrially important microbes. The present study focused on characterization of microbiota in four hot springs in Sri Lanka: Maha Oya; Wahava; Madunagala; and Kivlegama using high throughput 16S amplicon sequencing. Temperatures of the selected springs were ranged from 33.7 °C to 52.4 °C, whereas pH ranged from 7.2 to 8.2. Bacteria were found to be the dominant microbial group (>99%) compared to Archaea which represented less than 1% of microbiota. Four hot springs comprised of unique microbial community structures. Proteobacteria, Firmicutes, Bacteroidetes, Cloroflexi, Deinococcus and Actenobacteria were the major bacterial phyla. Moderately thermophilic genera such as Thermodesulfobacteria and Deinococcus-Thermus were detected as major genera that could be used in industrial applications operating at temperatures around 50 °C and alkaline reaction conditions.
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Affiliation(s)
- Dilini Sadeepa
- Centre for Water Quality and Algae Research, Department of Zoology, University of Sri Jayewardenepura, Gangodawila, Nugegoda 10250, Sri Lanka; Faculty of Graduate Studies, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Kosala Sirisena
- Department of Environmental Technology, Faculty of Technology, University of Colombo, Sri Lanka
| | - Pathmalal M Manage
- Centre for Water Quality and Algae Research, Department of Zoology, University of Sri Jayewardenepura, Gangodawila, Nugegoda 10250, Sri Lanka; Faculty of Graduate Studies, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka.
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5
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George SF, Fierer N, Levy JS, Adams B. Antarctic Water Tracks: Microbial Community Responses to Variation in Soil Moisture, pH, and Salinity. Front Microbiol 2021; 12:616730. [PMID: 33584618 PMCID: PMC7873294 DOI: 10.3389/fmicb.2021.616730] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 01/04/2021] [Indexed: 11/19/2022] Open
Abstract
Ice-free soils in the McMurdo Dry Valleys select for taxa able to cope with challenging environmental conditions, including extreme chemical water activity gradients, freeze-thaw cycling, desiccation, and solar radiation regimes. The low biotic complexity of Dry Valley soils makes them well suited to investigate environmental and spatial influences on bacterial community structure. Water tracks are annually wetted habitats in the cold-arid soils of Antarctica that form briefly each summer with moisture sourced from snow melt, ground ice thaw, and atmospheric deposition via deliquescence and vapor flow into brines. Compared to neighboring arid soils, water tracks are highly saline and relatively moist habitats. They represent a considerable area (∼5–10 km2) of the Dry Valley terrestrial ecosystem, an area that is expected to increase with ongoing climate change. The goal of this study was to determine how variation in the environmental conditions of water tracks influences the composition and diversity of microbial communities. We found significant differences in microbial community composition between on- and off-water track samples, and across two distinct locations. Of the tested environmental variables, soil salinity was the best predictor of community composition, with members of the Bacteroidetes phylum being relatively more abundant at higher salinities and the Actinobacteria phylum showing the opposite pattern. There was also a significant, inverse relationship between salinity and bacterial diversity. Our results suggest water track formation significantly alters dry soil microbial communities, likely influencing subsequent ecosystem functioning. We highlight how Dry Valley water tracks could be a useful model system for understanding the potential habitability of transiently wetted environments found on the surface of Mars.
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Affiliation(s)
- Scott F George
- Department of Biology, Brigham Young University, Provo, UT, United States
| | - Noah Fierer
- Department of Ecology and Evolutionary Biology and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States
| | - Joseph S Levy
- Department of Geology, Colgate University, Hamilton, NY, United States
| | - Byron Adams
- Department of Biology, Brigham Young University, Provo, UT, United States.,Monte L. Bean Museum, Brigham Young University, Provo, UT, United States
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6
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Çınar S, Mutlu MB. Prokaryotic Community Compositions of the Hypersaline Sediments of Tuz Lake Demonstrated by Cloning and High-Throughput Sequencing. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720060028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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7
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An evaluation of the core bacterial communities associated with hypersaline environments in the Qaidam Basin, China. Arch Microbiol 2020; 202:2093-2103. [PMID: 32488562 DOI: 10.1007/s00203-020-01927-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 05/15/2020] [Accepted: 05/26/2020] [Indexed: 12/31/2022]
Abstract
Hypersaline lakes and saltern areas are important industrial and biodiversity resources in the Qaidam Basin of China that reside at > 2600 m asl. Most hypersaline environments in this area are characterized by saturated salinity (~ 300 g/L salinity), nearly neutral pH, intense ultraviolet radiation, and extremely variable temperature fluctuations. The core bacterial communities associated with these stressful environments have nevertheless remained uninvestigated. 16S rRNA gene Illumina sequencing analyses revealed that the bacterial communities were dominated by core lineages including the Proteobacteria (39.4-64.6%) and the Firmicutes (17.0-42.7%). However, the relative abundances of common lineages, and especially the five most abundant taxa of Pseudomonas, Lactococcus, Anoxybacillus, Acinetobacter, and Brevundimonas, were highly variable across communities and closely associated with hypersaline characteristics in the samples. Network analysis revealed the presence of co-occurrence high relative abundance taxa (cluster I) that were highly correlated across all hypersaline samples. Additionally, temperature, total organic carbon, K+, and Mg2+ correlated highest with taxonomic distributions across communities. These results highlight the potential mechanisms that could underlie survival and adaptation to these extreme hypersaline ecosystems.
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8
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Ding X, Liu K, Gong G, Tian L, Ma J. Volatile organic compounds in the salt-lake sediments of the Tibet Plateau influence prokaryotic diversity and community assembly. Extremophiles 2020; 24:307-318. [PMID: 32025854 DOI: 10.1007/s00792-020-01155-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 01/06/2020] [Indexed: 11/30/2022]
Abstract
Volatile organic compounds (VOCs) are important environmental factors because they supply nutrients for microbial cells and mediate intercellular interactions. However, few studies have focused on the effects of VOCs on prokaryotic diversity and community composition. In this study, we examined the relationship between prokaryotic diversity and community composition and the content of VOCs in salt-lake sediments from the Tibet Plateau using amplicon sequencing of the 16S rRNA gene. Results showed that the alpha-diversity indices (Chao1, Shannon, and Simpson) were generally negatively correlated with the content of 36 VOCs (P < 0.05). The prokaryotic communities were significantly driven by multiple VOCs at the lineage-dependent pattern (P < 0.05). Further analysis indicated that VOCs, including 3-methylpyruvate, biuret, isocitric acid, and stearic acid, jointly explained 37.3% of the variations in prokaryotic communities. Supplemental VOCs-pyruvate, biuret, alanine, and aspartic acid-notably decreased the Chao1 and Shannon indices and significantly assembled co-occurrence networks for the bacterial communities in the saline sediments. Together, these results demonstrated that VOCs play a critical role in the regulation of the diversity, compositions, and network structures of prokaryotic communities in saline sediments.
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Affiliation(s)
- Xiaowei Ding
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Kaihui Liu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China.
| | - Guoli Gong
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Lu Tian
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
| | - Jun Ma
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China
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9
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Glamoclija M, Ramirez S, Sirisena K, Widanagamage I. Subsurface Microbial Ecology at Sediment-Groundwater Interface in Sulfate-Rich Playa; White Sands National Monument, New Mexico. Front Microbiol 2019; 10:2595. [PMID: 31781077 PMCID: PMC6861310 DOI: 10.3389/fmicb.2019.02595] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 10/25/2019] [Indexed: 01/23/2023] Open
Abstract
The hypersaline sediment and groundwater of playa lake, Lake Lucero, at the White Sands National Monument in New Mexico were examined for microbial community composition, geochemical gradients, and mineralogy during the dry season along a meter and a half depth profile of the sediment vs. the groundwater interface. Lake Lucero is a highly dynamic environment, strongly characterized by the capillary action of the groundwater, the extreme seasonality of the climate, and the hypersalinity. Sediments are predominantly composed of gypsum with minor quartz, thenardite, halite, quartz, epsomite, celestine, and clays. Geochemical analysis has revealed the predominance of nitrates over ammonium in all of the analyzed samples, indicating oxygenated conditions throughout the sediment column and in groundwater. Conversely, the microbial communities are primarily aerobic, gram-negative, and are largely characterized by their survival adaptations. Halophiles and oligotrophs are ubiquitous for all the samples. The very diverse communities contain methanogens, phototrophs, heterotrophs, saprophytes, ammonia-oxidizers, sulfur-oxidizers, sulfate-reducers, iron-reducers, and nitrifiers. The microbial diversity varied significantly between groundwater and sediment samples as their temperature adaptation inferences that revealed potential psychrophiles inhabiting the groundwater and thermophiles and mesophiles being present in the sediment. The dynamism of this environment manifests in the relatively even character of the sediment hosted microbial communities, where significant taxonomic distinctions were observed. Therefore, sediment and groundwater substrates are considered as separate ecological entities. We hope that the variety of the discussed playa environments and the microorganisms may be considered a useful terrestrial analog providing valuable information to aid future astrobiological explorations.
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Affiliation(s)
- Mihaela Glamoclija
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, United States
| | - Steven Ramirez
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, United States
| | - Kosala Sirisena
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, United States.,Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC, United States.,Department of Environmental Technology, Faculty of Technology, University of Colombo, Colombo, Sri Lanka
| | - Inoka Widanagamage
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, United States.,Department of Geology and Geological Engineering, The University of Mississippi, Oxford, MS, United States
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Molina‐Menor E, Tanner K, Vidal‐Verdú À, Peretó J, Porcar M. Microbial communities of the Mediterranean rocky shore: ecology and biotechnological potential of the sea-land transition. Microb Biotechnol 2019; 12:1359-1370. [PMID: 31562755 PMCID: PMC6801134 DOI: 10.1111/1751-7915.13475] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 12/29/2022] Open
Abstract
Microbial communities from harsh environments hold great promise as sources of biotechnologically relevant strains and compounds. In the present work, we have characterized the microorganisms from the supralittoral and splash zone in three different rocky locations of the Western Mediterranean coast, a tough environment characterized by high levels of irradiation and large temperature and salinity fluctuations. We have retrieved a complete view of the ecology and functional aspects of these communities and assessed the biotechnological potential of the cultivable microorganisms. All three locations displayed very similar taxonomic profiles, with the genus Rubrobacter and the families Xenococcaceae, Flammeovirgaceae, Phyllobacteriaceae, Rhodobacteraceae and Trueperaceae being the most abundant taxa; and Ascomycota and halotolerant archaea as members of the eukaryotic and archaeal community respectively. In parallel, the culture-dependent approach yielded a 100-isolates collection, out of which 12 displayed high antioxidant activities, as evidenced by two in vitro (hydrogen peroxide and DPPH) and confirmed in vivo with Caenorhabditis elegans assays, in which two isolates, CR22 and CR24, resulted in extended survival rates of the nematodes. This work is the first complete characterization of the Mediterranean splash-zone coastal microbiome, and our results indicate that this microbial niche is home of an extremophilic community that holds biotechnological potential.
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Affiliation(s)
- Esther Molina‐Menor
- Institute for Integrative Systems Biology ISysBioUniversitat de València‐CSICPaterna46980Spain
| | - Kristie Tanner
- Institute for Integrative Systems Biology ISysBioUniversitat de València‐CSICPaterna46980Spain
- Darwin Bioprospecting Excellence S.L. Parc Científic Universitat de ValènciaPaterna46980Spain
| | - Àngela Vidal‐Verdú
- Institute for Integrative Systems Biology ISysBioUniversitat de València‐CSICPaterna46980Spain
| | - Juli Peretó
- Institute for Integrative Systems Biology ISysBioUniversitat de València‐CSICPaterna46980Spain
- Darwin Bioprospecting Excellence S.L. Parc Científic Universitat de ValènciaPaterna46980Spain
- Departament de Bioquímica i Biologia MolecularUniversitat de ValènciaBurjassot46100Spain
| | - Manuel Porcar
- Institute for Integrative Systems Biology ISysBioUniversitat de València‐CSICPaterna46980Spain
- Darwin Bioprospecting Excellence S.L. Parc Científic Universitat de ValènciaPaterna46980Spain
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11
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Shurigin V, Hakobyan A, Panosyan H, Egamberdieva D, Davranov K, Birkeland NK. A glimpse of the prokaryotic diversity of the Large Aral Sea reveals novel extremophilic bacterial and archaeal groups. Microbiologyopen 2019; 8:e00850. [PMID: 31058468 PMCID: PMC6741134 DOI: 10.1002/mbo3.850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 03/27/2019] [Accepted: 03/27/2019] [Indexed: 01/10/2023] Open
Abstract
During the last five decades, the Aral Sea has gradually changed from a saline water body to a hypersaline lake. Microbial community inhabiting the Aral Sea has been through a succession and continuous adaptation during the last 50 years of increasing salinization, but so far, the microbial diversity has not been explored. Prokaryotic diversity of the Large Aral Sea using cultivation‐independent methods based on determination of environmental 16S rRNA gene sequences revealed a microbial community related to typical marine or (hyper) saline‐adapted Bacteria and Archaea. The archaeal sequences were phylogenetically affiliated with the order Halobacteriales, with a large number of operational taxonomic units constituting a novel cluster in the Haloferacaceae family. Bacterial community analysis indicated a higher diversity with representatives belonging to Proteobacteria, Actinobacteria and Bacteroidetes. Many members of Alphaproteobacteria and Gammaproteobacteria were affiliated with genera like Roseovarius, Idiomarina and Spiribacter which have previously been found in marine or hypersaline waters. The majority of the phylotypes was most closely related to uncultivated organisms and shared less than 97% identity with their closest match in GenBank, indicating a unique community structure in the Large Aral Sea with mostly novel species or genera.
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Affiliation(s)
- Vyacheslav Shurigin
- Department of Biological Sciences, University of Bergen, Bergen, Norway.,Department of Microbiology and Biotechnology, Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan
| | - Anna Hakobyan
- Department of Biological Sciences, University of Bergen, Bergen, Norway.,Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, Yerevan, Armenia
| | - Hovik Panosyan
- Department of Biochemistry, Microbiology and Biotechnology, Yerevan State University, Yerevan, Armenia
| | - Dilfuza Egamberdieva
- Department of Microbiology and Biotechnology, Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan.,Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, CAS, Urumqi, People's Republic of China.,Leibniz Centre for Agricultural Landscape Research (ZALF), Müncheberg, Germany
| | - Kakhramon Davranov
- Department of Microbiology and Biotechnology, Faculty of Biology, National University of Uzbekistan, Tashkent, Uzbekistan
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Applying Independent Component Analysis on Sentinel-2 Imagery to Characterize Geomorphological Responses to an Extreme Flood Event near the Non-Vegetated Río Colorado Terminus, Salar de Uyuni, Bolivia. REMOTE SENSING 2018. [DOI: 10.3390/rs10050725] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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