Extremophiles最新文献_第10页

Strategies for anti-oxidative stress and anti-acid stress in bioleaching of LiCoO₂ using an acidophilic microbial consortium. 嗜酸菌群在LiCoO2生物浸出过程中的抗氧化应激和抗酸应激策略

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-06-29 DOI: 10.1007/s00792-022-01270-3

Dehong Liu, Hongjie Shi, Guanglin Chen, Xu Zhang, Tingyue Gu, Minglong Zhu, Wensong Tan

{"title":"Strategies for anti-oxidative stress and anti-acid stress in bioleaching of LiCoO2 using an acidophilic microbial consortium.","authors":"Dehong Liu, Hongjie Shi, Guanglin Chen, Xu Zhang, Tingyue Gu, Minglong Zhu, Wensong Tan","doi":"10.1007/s00792-022-01270-3","DOIUrl":"https://doi.org/10.1007/s00792-022-01270-3","url":null,"abstract":"High metal ion concentrations and low pH cause severely inhibit the activity of an acidophilic microbial consortium (AMC) in bioleaching. This work investigated the effects of exogenous spermine on biofilm formation and the bioleaching efficiency of LiCoO2 by AMC in 9K medium. After the addition of 1 mM spermine, the activities of glutathione peroxidase and catalase increased, while the amount of H2O2, intracellular reactive oxygen species (ROS) and malondialdehyde in AMC decreased. These results indicated that the ability of AMC biofilm to resist oxidative stress introduced by 3.5 g/L Li+ and 30.1 g/L Co2+ was improved by spermine. The activity of glutamate decarboxylase was promoted to restore the intracellular pH buffering ability of AMC. Electrochemical measurements showed that the oxidation rate of pyrite was increased by exogenous spermine. As a result, high bioleaching efficiencies of 97.1% for Li+ and 96.1% for Co2+ from a 5.0% (w v-1) lithium cobalt oxide powder slurry were achieved. This work demonstrated that Tafel polarization can be used to monitor the AMC biofilm's ability of uptaking electrons from pyrite during bioleaching. The corrosion current density increased with 1 mM spermine, indicating enhanced electron uptake by the biofilm from pyrite.","PeriodicalId":12302,"journal":{"name":"Extremophiles","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40408442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Asgard archaea in saline environments. 盐渍环境中的阿斯加德古细菌。

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-06-28 DOI: 10.1007/s00792-022-01266-z

Horia L Banciu, Ionuț M Gridan, Adrian V Zety, Andreea Baricz

{"title":"Asgard archaea in saline environments.","authors":"Horia L Banciu, Ionuț M Gridan, Adrian V Zety, Andreea Baricz","doi":"10.1007/s00792-022-01266-z","DOIUrl":"https://doi.org/10.1007/s00792-022-01266-z","url":null,"abstract":"Members of candidate Asgardarchaeota superphylum appear to share numerous eukaryotic-like attributes thus being broadly explored for their relevance to eukaryogenesis. On the contrast, the ecological roles of Asgard archaea remains understudied. Asgard archaea have been frequently associated to low-oxygen aquatic sedimentary environments worldwide spanning a broad but not extreme salinity range. To date, the available information on diversity and potential biogeochemical roles of Asgardarchaeota mostly sourced from marine habitats and to a much lesser extend from true saline environments (i.e., > 3% w/v total salinity). Here, we provide an overview on diversity and ecological implications of Asgard archaea distributed across saline environments and briefly explore their metagenome-resolved potential for osmoadaptation. Loki-, Thor- and Heimdallarchaeota are the dominant Asgard clades in saline habitats where they might employ anaerobic/microaerophilic organic matter degradation and autotrophic carbon fixation. Homologs of primary solute uptake ABC transporters seemingly prevail in Thorarchaeota, whereas those putatively involved in trehalose and ectoine biosynthesis were mostly inferred in Lokiarchaeota. We speculate that Asgardarchaeota might adopt compatible solute-accumulating ('salt-out') strategy as response to salt stress. Our current understanding on the distribution, ecology and salt-adaptive strategies of Asgardarchaeota in saline environments are, however, limited by insufficient sampling and incompleteness of the available metagenome-assembled genomes. Extensive sampling combined with 'omics'- and cultivation-based approaches seem, therefore, crucial to gain deeper knowledge on this particularly intriguing archaeal lineage.","PeriodicalId":12302,"journal":{"name":"Extremophiles","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40400878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Halomonas faecis sp. nov., a halophilic bacterium isolated from human faeces. 粪盐单胞菌，一种从人类粪便中分离出来的嗜盐细菌。

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-06-18 DOI: 10.1007/s00792-022-01269-w

Zhu-Xiang Liu, Jin-Hua Chen, Ling-Ling Yang, Yu-Zhou Feng, Li-Ying Deng, Jian-Wu He, Shu-Kun Tang, Yi-Guang Chen

{"title":"Halomonas faecis sp. nov., a halophilic bacterium isolated from human faeces.","authors":"Zhu-Xiang Liu, Jin-Hua Chen, Ling-Ling Yang, Yu-Zhou Feng, Li-Ying Deng, Jian-Wu He, Shu-Kun Tang, Yi-Guang Chen","doi":"10.1007/s00792-022-01269-w","DOIUrl":"https://doi.org/10.1007/s00792-022-01269-w","url":null,"abstract":"A novel moderately halophilic, Gram-stain-negative, catalase- and oxidase-positive, strictly aerobic, non-sporulating, non-motile rod, designated strain JSM 104105 T, was isolated from human faeces. Strain JSM 104105 T was able to grow with 0.5-18% (w/v) NaCl (optimum 4-9%), at pH 6-10.5 (optimum pH 7-8) and at 10-40 °C (optimum 30 °C) in complex media. The major cellular fatty acids were C18:1ω7c, C16:0, C16:1ω7c and/or C16:1ω6c, C19:0 cyclo ω8c and C12:0 3-OH. The polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, an unidentified aminophospholipid, an unidentified glycolipid and three unidentified phospholipids. The predominant respiratory quinone was Q-9 and the genomic DNA G + C content was 64.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain JSM 104105 T should be assigned to the genus Halomonas, and was most closely related to Halomonas gudaonensis SL014B-69 T (99.0% sequence similarity), followed by Halomonas azerbaijanica TBZ202T (98.6%) and Halomonas lysinitropha 3(2)T (97.3%). The whole genomic analysis showed that strain JSM 104105 T constituted a different taxon separated from the recognized Halomonas species. Combined data from phenotypic and genotypic studies demonstrated that strain JSM 104105 T represents a new species of the genus Halomonas, for which the name Halomonas faecis sp. nov. is proposed. The type strain is JSM 104105 T (= CCTCC AB 2014160 T = CGMCC 1.12945 T = KCTC 42146 T).","PeriodicalId":12302,"journal":{"name":"Extremophiles","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39986819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evansella halocellulosilytica sp. nov., an alkali-halotolerant and cellulose-dissolving bacterium isolated from bauxite residue 从铝土矿残渣中分离的耐碱、溶纤维素细菌Evansella halocellulosillica sp.nov

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-06-04 DOI: 10.1007/s00792-022-01267-y

Guo-Hong Liu, Manik Prabhu Narsing Rao, Qianqian Chen, Jian-mei Che, Huai Shi, Bo Liu, Wenjun Li

引用次数: 2

Bacterial diversity and community structure in the rhizosphere of the halophyte Halocnemum strobilaceum in an Algerian arid saline soil 阿尔及利亚干旱盐碱地盐生植物盐芽草根际细菌多样性和群落结构

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-06-02 DOI: 10.1007/s00792-022-01268-x

Sabrina Behairi, N. Baha, M. Barakat, Philippe Ortet, W. Achouak, T. Heulin, Y. Kaci

引用次数: 2

Simple sequence repeat insertion induced stability and potential ‘gain of function’ in the proteins of extremophilic bacteria 简单序列重复插入诱导极端微生物蛋白质的稳定性和潜在的“功能获得”

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-05-05 DOI: 10.1007/s00792-022-01265-0

S. Mahfooz, G. Shankar, Jitendra Narayan, Pallavi Singh, Y. Akhter

引用次数: 2

Fungal diversity in a sediment core from climate change impacted Boeckella Lake, Hope Bay, north-eastern Antarctic Peninsula assessed using metabarcoding 南极半岛东北部霍普湾受气候变化影响的Boeckella湖沉积物核心中的真菌多样性使用代谢条形码进行评估

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-05-02 DOI: 10.1007/s00792-022-01264-1

L. Rosa, M. B. Ogaki, J. Lirio, R. Vieira, S. Coria, O. Pinto, Micheline Carvalho-Silva, P. Convey, C. Rosa, P. Câmara

引用次数: 13

Limits to the three domains of life: lessons from community assembly along an Antarctic salinity gradient. 生命三个领域的局限性：南极盐度梯度沿线群落聚集的经验教训

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-03-16 DOI: 10.1007/s00792-022-01262-3

Xiaoben Jiang, David J Van Horn, Jordan G Okie, Heather N Buelow, Egbert Schwartz, Daniel R Colman, Kelli L Feeser, Cristina D Takacs-Vesbach

{"title":"Limits to the three domains of life: lessons from community assembly along an Antarctic salinity gradient.","authors":"Xiaoben Jiang, David J Van Horn, Jordan G Okie, Heather N Buelow, Egbert Schwartz, Daniel R Colman, Kelli L Feeser, Cristina D Takacs-Vesbach","doi":"10.1007/s00792-022-01262-3","DOIUrl":"10.1007/s00792-022-01262-3","url":null,"abstract":"Extremophiles exist among all three domains of life; however, physiological mechanisms for surviving harsh environmental conditions differ among Bacteria, Archaea and Eukarya. Consequently, we expect that domain-specific variation of diversity and community assembly patterns exist along environmental gradients in extreme environments. We investigated inter-domain community compositional differences along a high-elevation salinity gradient in the McMurdo Dry Valleys, Antarctica. Conductivity for 24 soil samples collected along the gradient ranged widely from 50 to 8355 µS cm-1. Taxonomic richness varied among domains, with a total of 359 bacterial, 2 archaeal, 56 fungal, and 69 non-fungal eukaryotic operational taxonomic units (OTUs). Richness for bacteria, archaea, fungi, and non-fungal eukaryotes declined with increasing conductivity (all P < 0.05). Principal coordinate ordination analysis (PCoA) revealed significant (ANOSIM R = 0.97) groupings of low/high salinity bacterial OTUs, while OTUs from other domains were not significantly clustered. Bacterial beta diversity was unimodally distributed along the gradient and had a nested structure driven by species losses, whereas in fungi and non-fungal eukaryotes beta diversity declined monotonically without strong evidence of nestedness. Thus, while increased salinity acts as a stressor in all domains, the mechanisms driving community assembly along the gradient differ substantially between the domains.","PeriodicalId":12302,"journal":{"name":"Extremophiles","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49643040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Desulfovulcanus ferrireducens gen. nov., sp. nov., a thermophilic autotrophic iron and sulfate-reducing bacterium from subseafloor basalt that grows on akaganéite and lepidocrocite minerals. Desulfovulcanus ferrireducens gen.

IF 2.6 3区生物学

Extremophiles Pub Date : 2022-02-21 DOI: 10.1007/s00792-022-01263-2

Srishti Kashyap, Masroque Musa, Kaylee A Neat, Deborah A Leopo, James F Holden

{"title":"Desulfovulcanus ferrireducens gen. nov., sp. nov., a thermophilic autotrophic iron and sulfate-reducing bacterium from subseafloor basalt that grows on akaganéite and lepidocrocite minerals.","authors":"Srishti Kashyap, Masroque Musa, Kaylee A Neat, Deborah A Leopo, James F Holden","doi":"10.1007/s00792-022-01263-2","DOIUrl":"10.1007/s00792-022-01263-2","url":null,"abstract":"A deep-sea thermophilic bacterium, strain Ax17T, was isolated from 25 °C hydrothermal fluid at Axial Seamount. It was obligately anaerobic and autotrophic, oxidized molecular hydrogen and formate, and reduced synthetic nanophase Fe(III) (oxyhydr)oxide minerals, sulfate, sulfite, thiosulfate, and elemental sulfur for growth. It produced up to 20 mM Fe2+ when grown on ferrihydrite but < 5 mM Fe2+ when grown on akaganéite, lepidocrocite, hematite, and goethite. It was a straight to curved rod that grew at temperatures ranging from 35 to 70 °C (optimum 65 °C) and a minimum doubling time of 7.1 h, in the presence of 1.5-6% NaCl (optimum 3%) and pH 5-9 (optimum 8.0). Phylogenetic analysis based on 16S rRNA gene sequences indicated that the strain was 90-92% identical to other genera of the family Desulfonauticaceae in the phylum Pseudomonadota. The genome of Ax17T was sequenced, which yielded 2,585,834 bp and contained 2407 protein-coding sequences. Based on overall genome relatedness index analyses and its unique phenotypic characteristics, strain Ax17T is suggested to represent a novel genus and species, for which the name Desulfovulcanus ferrireducens is proposed. The type strain is Ax17T (= DSM 111878T = ATCC TSD-233T).","PeriodicalId":12302,"journal":{"name":"Extremophiles","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2022-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8860800/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39942910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anion-type modulates the effect of salt stress on saline lake bacteria. 阴离子型调节盐胁迫对盐湖细菌的影响。

IF 2.9 3区生物学

Extremophiles Pub Date : 2022-02-09 DOI: 10.1007/s00792-022-01260-5

Bianka Csitári, Anna Bedics, Tamás Felföldi, Emil Boros, Hajnalka Nagy, István Máthé, Anna J Székely

{"title":"Anion-type modulates the effect of salt stress on saline lake bacteria.","authors":"Bianka Csitári, Anna Bedics, Tamás Felföldi, Emil Boros, Hajnalka Nagy, István Máthé, Anna J Székely","doi":"10.1007/s00792-022-01260-5","DOIUrl":"https://doi.org/10.1007/s00792-022-01260-5","url":null,"abstract":"Beside sodium chloride, inland saline aquatic systems often contain other anions than chloride such as hydrogen carbonate and sulfate. Our understanding of the biological effects of salt composition diversity is limited; therefore, the aim of this study was to examine the effect of different anions on the growth of halophilic bacteria. Accordingly, the salt composition and concentration preference of 172 strains isolated from saline and soda lakes that differed in ionic composition was tested using media containing either carbonate, chloride or sulfate as anion in concentration values ranging from 0 to 0.40 mol/L. Differences in salt-type preference among bacterial strains were observed in relationship to the salt composition of the natural habitat they were isolated from indicating specific salt-type adaptation. Sodium carbonate represented the strongest selective force, while majority of strains was well-adapted to growth even at high concentrations of sodium sulfate. Salt preference was to some extent associated with taxonomy, although variations even within the same bacterial species were also identified. Our results suggest that the extent of the effect of dissolved salts in saline lakes is not limited to their concentration but the type of anion also substantially impacts the growth and survival of individual microorganisms.","PeriodicalId":12302,"journal":{"name":"Extremophiles","volume":null,"pages":null},"PeriodicalIF":2.9,"publicationDate":"2022-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8825391/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"39598892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4