ISME Journal最新文献_第10页

Temperature-dependent trophic associations modulate soil bacterial communities along latitudinal gradients. 与温度相关的营养关联沿着纬度梯度调节土壤细菌群落。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae145

Xing Huang, Jianjun Wang, Kenneth Dumack, Karthik Anantharaman, Bin Ma, Yan He, Weiping Liu, Hongjie Di, Yong Li, Jianming Xu

{"title":"Temperature-dependent trophic associations modulate soil bacterial communities along latitudinal gradients.","authors":"Xing Huang, Jianjun Wang, Kenneth Dumack, Karthik Anantharaman, Bin Ma, Yan He, Weiping Liu, Hongjie Di, Yong Li, Jianming Xu","doi":"10.1093/ismejo/wrae145","DOIUrl":"10.1093/ismejo/wrae145","url":null,"abstract":"Understanding the environmental and biological mechanisms shaping latitudinal patterns in microbial diversity is challenging in the field of ecology. Although multiple hypotheses have been proposed to explain these patterns, a consensus has rarely been reached. Here, we conducted a large-scale field survey and microcosm experiments to investigate how environmental heterogeneity and putative trophic interactions (exerted by protist-bacteria associations and T4-like virus-bacteria associations) affect soil bacterial communities along a latitudinal gradient. We found that the microbial latitudinal diversity was kingdom dependent, showing decreasing, clumped, and increasing trends in bacteria, protists, and T4-like viruses, respectively. Climatic and edaphic drivers played predominant roles in structuring the bacterial communities; the intensity of the climatic effect increased sharply from 30°N to 32°N, whereas the intensity of the edaphic effect remained stable. Biotic associations were also essential in shaping the bacterial communities, with protist-bacteria associations showing a quadratic distribution, whereas virus-bacteria associations were significant only at high latitudes. The microcosm experiments further revealed that the temperature component, which is affiliated with climate conditions, is the primary regulator of trophic associations along the latitudinal gradient. Overall, our study highlights a previously underestimated mechanism of how the putative biotic interactions influence bacterial communities and their response to environmental gradients.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11334336/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141903451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Leveraging genome-scale metabolic models to understand aerobic methanotrophs. 利用基因组尺度代谢模型了解需氧甲烷营养体。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae102

Magdalena Wutkowska, Vojtěch Tláskal, Sergio Bordel, Lisa Y Stein, Justus Amuche Nweze, Anne Daebeler

{"title":"Leveraging genome-scale metabolic models to understand aerobic methanotrophs.","authors":"Magdalena Wutkowska, Vojtěch Tláskal, Sergio Bordel, Lisa Y Stein, Justus Amuche Nweze, Anne Daebeler","doi":"10.1093/ismejo/wrae102","DOIUrl":"10.1093/ismejo/wrae102","url":null,"abstract":"Genome-scale metabolic models (GEMs) are valuable tools serving systems biology and metabolic engineering. However, GEMs are still an underestimated tool in informing microbial ecology. Since their first application for aerobic gammaproteobacterial methane oxidizers less than a decade ago, GEMs have substantially increased our understanding of the metabolism of methanotrophs, a microbial guild of high relevance for the natural and biotechnological mitigation of methane efflux to the atmosphere. Particularly, GEMs helped to elucidate critical metabolic and regulatory pathways of several methanotrophic strains, predicted microbial responses to environmental perturbations, and were used to model metabolic interactions in cocultures. Here, we conducted a systematic review of GEMs exploring aerobic methanotrophy, summarizing recent advances, pointing out weaknesses, and drawing out probable future uses of GEMs to improve our understanding of the ecology of methane oxidizers. We also focus on their potential to unravel causes and consequences when studying interactions of methane-oxidizing bacteria with other methanotrophs or members of microbial communities in general. This review aims to bridge the gap between applied sciences and microbial ecology research on methane oxidizers as model organisms and to provide an outlook for future studies.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11195481/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141307286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nitrous oxide inhibition of methanogenesis represents an underappreciated greenhouse gas emission feedback. 一氧化二氮对甲烷生成的抑制是一种未被充分重视的温室气体排放反馈。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae027

Yongchao Yin, Fadime Kara-Murdoch, Robert W Murdoch, Jun Yan, Gao Chen, Yongchao Xie, Yanchen Sun, Frank E Löffler

{"title":"Nitrous oxide inhibition of methanogenesis represents an underappreciated greenhouse gas emission feedback.","authors":"Yongchao Yin, Fadime Kara-Murdoch, Robert W Murdoch, Jun Yan, Gao Chen, Yongchao Xie, Yanchen Sun, Frank E Löffler","doi":"10.1093/ismejo/wrae027","DOIUrl":"10.1093/ismejo/wrae027","url":null,"abstract":"Methane (CH4) and nitrous oxide (N2O) are major greenhouse gases that are predominantly generated by microbial activities in anoxic environments. N2O inhibition of methanogenesis has been reported, but comprehensive efforts to obtain kinetic information are lacking. Using the model methanogen Methanosarcina barkeri strain Fusaro and digester sludge-derived methanogenic enrichment cultures, we conducted growth yield and kinetic measurements and showed that micromolar concentrations of N2O suppress the growth of methanogens and CH4 production from major methanogenic substrate classes. Acetoclastic methanogenesis, estimated to account for two-thirds of the annual 1 billion metric tons of biogenic CH4, was most sensitive to N2O, with inhibitory constants (KI) in the range of 18-25 μM, followed by hydrogenotrophic (KI, 60-90 μM) and methylotrophic (KI, 110-130 μM) methanogenesis. Dissolved N2O concentrations exceeding these KI values are not uncommon in managed (i.e. fertilized soils and wastewater treatment plants) and unmanaged ecosystems. Future greenhouse gas emissions remain uncertain, particularly from critical zone environments (e.g. thawing permafrost) with large amounts of stored nitrogenous and carbonaceous materials that are experiencing unprecedented warming. Incorporating relevant feedback effects, such as the significant N2O inhibition on methanogenesis, can refine climate models and improve predictive capabilities.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10960958/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140050874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large-scale single-virus genomics uncovers hidden diversity of river water viruses and diversified gene profiles. 大规模单病毒基因组学揭示了河水病毒隐藏的多样性和多样化的基因特征。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae124

Yohei Nishikawa, Ryota Wagatsuma, Yuko Tsukada, Lin Chia-Ling, Rieka Chijiiwa, Masahito Hosokawa, Haruko Takeyama

{"title":"Large-scale single-virus genomics uncovers hidden diversity of river water viruses and diversified gene profiles.","authors":"Yohei Nishikawa, Ryota Wagatsuma, Yuko Tsukada, Lin Chia-Ling, Rieka Chijiiwa, Masahito Hosokawa, Haruko Takeyama","doi":"10.1093/ismejo/wrae124","DOIUrl":"10.1093/ismejo/wrae124","url":null,"abstract":"Environmental viruses (primarily bacteriophages) are widely recognized as playing an important role in ecosystem homeostasis through the infection of host cells. However, the majority of environmental viruses are still unknown as their mosaic structure and frequent mutations in their sequences hinder genome construction in current metagenomics. To enable the large-scale acquisition of environmental viral genomes, we developed a new single-viral genome sequencing platform with microfluidic-generated gel beads. Amplification of individual DNA viral genomes in mass-produced gel beads allows high-throughput genome sequencing compared to conventional single-virus genomics. The sequencing analysis of river water samples yielded 1431 diverse viral single-amplified genomes, whereas viral metagenomics recovered 100 viral metagenome-assembled genomes at the comparable sequence depth. The 99.5% of viral single-amplified genomes were determined novel at the species level, most of which could not be recovered by a metagenomic assembly. The large-scale acquisition of diverse viral genomes identified protein clusters commonly detected in different viral strains, allowing the gene transfer to be tracked. Moreover, comparative genomics within the same viral species revealed that the profiles of various methyltransferase subtypes were diverse, suggesting an enhanced escape from host bacterial internal defense mechanisms. Our use of gel bead-based single-virus genomics will contribute to exploring the nature of viruses by accelerating the accumulation of draft genomes of environmental DNA viruses.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11283719/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141555842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tradeoffs between phage resistance and nitrogen fixation drive the evolution of genes essential for cyanobacterial heterocyst functionality. 噬菌体抗性与固氮作用之间的权衡推动了蓝藻异囊功能所必需基因的进化。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrad008

Dikla Kolan, Esther Cattan-Tsaushu, Hagay Enav, Zohar Freiman, Nechama Malinsky-Rushansky, Shira Ninio, Sarit Avrani

{"title":"Tradeoffs between phage resistance and nitrogen fixation drive the evolution of genes essential for cyanobacterial heterocyst functionality.","authors":"Dikla Kolan, Esther Cattan-Tsaushu, Hagay Enav, Zohar Freiman, Nechama Malinsky-Rushansky, Shira Ninio, Sarit Avrani","doi":"10.1093/ismejo/wrad008","DOIUrl":"10.1093/ismejo/wrad008","url":null,"abstract":"Harmful blooms caused by diazotrophic (nitrogen-fixing) Cyanobacteria are becoming increasingly frequent and negatively impact aquatic environments worldwide. Cyanophages (viruses infecting Cyanobacteria) can potentially regulate cyanobacterial blooms, yet Cyanobacteria can rapidly acquire mutations that provide protection against phage infection. Here, we provide novel insights into cyanophage:Cyanobacteria interactions by characterizing the resistance to phages in two species of diazotrophic Cyanobacteria: Nostoc sp. and Cylindrospermopsis raciborskii. Our results demonstrate that phage resistance is associated with a fitness tradeoff by which resistant Cyanobacteria have reduced ability to fix nitrogen and/or to survive nitrogen starvation. Furthermore, we use whole-genome sequence analysis of 58 Nostoc-resistant strains to identify several mutations associated with phage resistance, including in cell surface-related genes and regulatory genes involved in the development and function of heterocysts (cells specialized in nitrogen fixation). Finally, we employ phylogenetic analyses to show that most of these resistance genes are accessory genes whose evolution is impacted by lateral gene transfer events. Together, these results further our understanding of the interplay between diazotrophic Cyanobacteria and their phages and suggest that a tradeoff between phage resistance and nitrogen fixation affects the evolution of cell surface-related genes and of genes involved in heterocyst differentiation and nitrogen fixation.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":"18 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10811720/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139747727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Active prophages in coral-associated Halomonas capable of lateral transduction. 珊瑚相关卤单胞菌中能进行横向转导的活性噬菌体。

IF 11 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae085

Ziyao Liu, Kaihao Tang, Yiqing Zhou, Tianlang Liu, Yunxue Guo, Duoting Wu, Xiaoxue Wang

{"title":"Active prophages in coral-associated Halomonas capable of lateral transduction.","authors":"Ziyao Liu, Kaihao Tang, Yiqing Zhou, Tianlang Liu, Yunxue Guo, Duoting Wu, Xiaoxue Wang","doi":"10.1093/ismejo/wrae085","DOIUrl":"10.1093/ismejo/wrae085","url":null,"abstract":"Temperate phages can interact with bacterial hosts through lytic and lysogenic cycles via different mechanisms. Lysogeny has been identified as the major form of bacteria-phage interaction in the coral-associated microbiome. However, the lysogenic-to-lytic switch of temperate phages in ecologically important coral-associated bacteria and its ecological impact have not been extensively investigated. By studying the prophages in coral-associated Halomonas meridiana, we found that two prophages, Phm1 and Phm3, are inducible by the DNA-damaging agent mitomycin C and that Phm3 is spontaneously activated under normal cultivation conditions. Furthermore, Phm3 undergoes an atypical lytic pathway that can amplify and package adjacent host DNA, potentially resulting in lateral transduction. The induction of Phm3 triggered a process of cell lysis accompanied by the formation of outer membrane vesicles (OMVs) and Phm3 attached to OMVs. This unique cell-lysis process was controlled by a four-gene lytic module within Phm3. Further analysis of the Tara Ocean dataset revealed that Phm3 represents a new group of temperate phages that are widely distributed and transcriptionally active in the ocean. Therefore, the combination of lateral transduction mediated by temperate phages and OMV transmission offers a versatile strategy for host-phage coevolution in marine ecosystems.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11131426/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140917344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metabolic potential of Nitrososphaera-associated clades. 亚硝基磷藻相关支系的代谢潜力。

IF 11 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae086

Qicheng Bei, Thomas Reitz, Martin Schädler, Logan H Hodgskiss, Jingjing Peng, Beatrix Schnabel, François Buscot, Nico Eisenhauer, Christa Schleper, Anna Heintz-Buschart

{"title":"Metabolic potential of Nitrososphaera-associated clades.","authors":"Qicheng Bei, Thomas Reitz, Martin Schädler, Logan H Hodgskiss, Jingjing Peng, Beatrix Schnabel, François Buscot, Nico Eisenhauer, Christa Schleper, Anna Heintz-Buschart","doi":"10.1093/ismejo/wrae086","DOIUrl":"10.1093/ismejo/wrae086","url":null,"abstract":"Soil ammonia-oxidizing archaea (AOA) play a crucial role in converting ammonia to nitrite, thereby mobilizing reactive nitrogen species into their soluble form, with a significant impact on nitrogen losses from terrestrial soils. Yet, our knowledge regarding their diversity and functions remains limited. In this study, we reconstructed 97 high-quality AOA metagenome-assembled genomes (MAGs) from 180 soil samples collected in Central Germany during 2014-2019 summers. These MAGs were affiliated with the order Nitrososphaerales and clustered into four family-level clades (NS-α/γ/δ/ε). Among these MAGs, 75 belonged to the most abundant but least understood δ-clade. Within the δ-clade, the amoA genes in three MAGs from neutral soils showed a 99.5% similarity to the fosmid clone 54d9, which has served as representative of the δ-clade for the past two decades since even today no cultivated representatives are available. Seventy-two MAGs constituted a distinct δ sub-clade, and their abundance and expression activity were more than twice that of other MAGs in slightly acidic soils. Unlike the less abundant clades (α, γ, and ε), the δ-MAGs possessed multiple highly expressed intracellular and extracellular carbohydrate-active enzymes responsible for carbohydrate binding (CBM32) and degradation (GH5), along with highly expressed genes involved in ammonia oxidation. Together, these results suggest metabolic versatility of uncultured soil AOA and a potential mixotrophic or chemolithoheterotrophic lifestyle among 54d9-like AOA.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11131427/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140923826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Antibiotic-altered gut microbiota explain host memory plasticity and disrupt pace-of-life covariation for an aquatic snail. 抗生素改变的肠道微生物群解释了宿主记忆的可塑性，并破坏了一种水生蜗牛的生活步调共变性。

IF 11 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae078

Gabrielle L Davidson, Ignacio A Cienfuegos, Sarah Dalesman

{"title":"Antibiotic-altered gut microbiota explain host memory plasticity and disrupt pace-of-life covariation for an aquatic snail.","authors":"Gabrielle L Davidson, Ignacio A Cienfuegos, Sarah Dalesman","doi":"10.1093/ismejo/wrae078","DOIUrl":"10.1093/ismejo/wrae078","url":null,"abstract":"There is mounting evidence that intestinal microbiota communities and their genes (the gut microbiome) influence how animals behave and interact with their environment, driving individual variation. Individual covariation in behavioural, physiological, and cognitive traits among individuals along a fast-slow continuum is thought to arise because these traits are linked as part of an adaptive pace-of-life strategy. Yet paradoxically, trait intercorrelation is absent or disrupted in some populations but not others. Here, we provide experimental evidence from aquatic pond snails (Lymnaea stagnalis) that environmental stressors and the gut microbiota explain host phenotypic plasticity and disrupted covariation among traits. Antibiotic exposure at varying levels of ecologically relevant concentrations had multiple effects starting with gut microbiota diversity, differential abundance, and inferred function. Memory declined in line with antibiotic concentrations that caused the most profound gut microbiota disruption, and although pace-of-life traits remained rigid, their covariation did not. Moreover, inferred microbial metabolic pathways with biologically relevant host functions explained individual and treatment variation in phenotypes. Together, our results point to the gut microbiome as a proximate mechanism influencing the emergence and maintenance of phenotypic variation within populations and highlights the need to decipher whether the gut microbiome's sensitivity to environmental pollution facilitates adaptive or maladaptive phenotypic plasticity.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":"18 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11136587/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141176632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copper stress shapes the dynamic behavior of amoebae and their associated bacteria. 铜应力塑造了变形虫及其相关细菌的动态行为。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae100

Yijing Shi, Lu Ma, Min Zhou, Zhili He, Yuanchen Zhao, Junyue Hong, Xinyue Zou, Lin Zhang, Longfei Shu

{"title":"Copper stress shapes the dynamic behavior of amoebae and their associated bacteria.","authors":"Yijing Shi, Lu Ma, Min Zhou, Zhili He, Yuanchen Zhao, Junyue Hong, Xinyue Zou, Lin Zhang, Longfei Shu","doi":"10.1093/ismejo/wrae100","DOIUrl":"10.1093/ismejo/wrae100","url":null,"abstract":"Amoeba-bacteria interactions are prevalent in both natural ecosystems and engineered environments. Amoebae, as essential consumers, hold significant ecological importance within ecosystems. Besides, they can establish stable symbiotic associations with bacteria. Copper plays a critical role in amoeba predation by either killing or restricting the growth of ingested bacteria in phagosomes. However, certain symbiotic bacteria have evolved mechanisms to persist within the phagosomal vacuole, evading antimicrobial defenses. Despite these insights, the impact of copper on the symbiotic relationships between amoebae and bacteria remains poorly understood. In this study, we investigated the effects of copper stress on amoebae and their symbiotic relationships with bacteria. Our findings revealed that elevated copper concentration adversely affected amoeba growth and altered cellular fate. Symbiont type significantly influenced the responses of the symbiotic relationships to copper stress. Beneficial symbionts maintained stability under copper stress, but parasitic symbionts exhibited enhanced colonization of amoebae. Furthermore, copper stress favored the transition of symbiotic relationships between amoebae and beneficial symbionts toward the host's benefit. Conversely, the pathogenic effects of parasitic symbionts on hosts were exacerbated under copper stress. This study sheds light on the intricate response mechanisms of soil amoebae and amoeba-bacteria symbiotic systems to copper stress, providing new insights into symbiotic dynamics under abiotic factors. Additionally, the results underscore the potential risks of copper accumulation in the environment for pathogen transmission and biosafety.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11197307/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141288892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evolutionary history of tyrosine-supplementing endosymbionts in pollen-feeding beetles. 食花粉甲虫体内补充酪氨酸的内共生体的进化史。

IF 10.8 1区环境科学与生态学

ISME Journal Pub Date : 2024-01-08 DOI: 10.1093/ismejo/wrae080

Jürgen C Wierz, Matthew L Gimmel, Selina Huthmacher, Tobias Engl, Martin Kaltenpoth

{"title":"Evolutionary history of tyrosine-supplementing endosymbionts in pollen-feeding beetles.","authors":"Jürgen C Wierz, Matthew L Gimmel, Selina Huthmacher, Tobias Engl, Martin Kaltenpoth","doi":"10.1093/ismejo/wrae080","DOIUrl":"10.1093/ismejo/wrae080","url":null,"abstract":"Many insects feeding on nutritionally challenging diets like plant sap, leaves, or wood engage in ancient associations with bacterial symbionts that supplement limiting nutrients or produce digestive or detoxifying enzymes. However, the distribution, function, and evolutionary dynamics of microbial symbionts in insects exploiting other plant tissues or relying on a predacious diet remain poorly understood. Here, we investigated the evolutionary history and function of the intracellular gamma-proteobacterial symbiont \"Candidatus Dasytiphilus stammeri\" in soft-winged flower beetles (Coleoptera, Melyridae, Dasytinae) that transition from saprophagy or carnivory to palynivory (pollen-feeding) between larval and adult stage. Reconstructing the distribution of the symbiont within the Dasytinae phylogeny unraveled not only a long-term coevolution, originating from a single acquisition event with subsequent host-symbiont codiversification, but also several independent symbiont losses. The analysis of 20 different symbiont genomes revealed that their genomes are severely eroded. However, the universally retained shikimate pathway indicates that the core metabolic contribution to their hosts is the provisioning of tyrosine for cuticle sclerotization and melanization. Despite the high degree of similarity in gene content and order across symbiont strains, the capacity to synthesize additional essential amino acids and vitamins and to recycle urea is retained in some but not all symbionts, suggesting ecological differences among host lineages. This report of tyrosine-provisioning symbionts in insects with saprophagous or carnivorous larvae and pollen-feeding adults expands our understanding of tyrosine supplementation as an important symbiont-provided benefit across a broad range of insects with diverse feeding ecologies.","PeriodicalId":50271,"journal":{"name":"ISME Journal","volume":" ","pages":""},"PeriodicalIF":10.8,"publicationDate":"2024-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11191362/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141307251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0