Environmental microbiology最新文献_第2页

High Prevalence of Plasmid-Mediated Quinolone Resistance in Salmonella enterica Serovars Isolated From Surface Water 地表水分离的肠沙门氏菌血清型质粒介导的喹诺酮类耐药性高流行率

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-07 DOI: 10.1111/1462-2920.70140

Daniel F. M. Monte, Alan Douglas de Lima Rocha, Mateus Lacerda Pereira Lemos, Laiorayne Araújo de Lima, Julia Memrava Cabrera, Nádyra Jerônimo da Silva, Xinyang Huang, Zhao Chen, Eric W. Brown, Marc W. Allard, Rebecca L. Bell, Magaly Toro, Jianghong Meng, Celso José Bruno de Oliveira

{"title":"High Prevalence of Plasmid-Mediated Quinolone Resistance in Salmonella enterica Serovars Isolated From Surface Water","authors":"Daniel F. M. Monte, Alan Douglas de Lima Rocha, Mateus Lacerda Pereira Lemos, Laiorayne Araújo de Lima, Julia Memrava Cabrera, Nádyra Jerônimo da Silva, Xinyang Huang, Zhao Chen, Eric W. Brown, Marc W. Allard, Rebecca L. Bell, Magaly Toro, Jianghong Meng, Celso José Bruno de Oliveira","doi":"10.1111/1462-2920.70140","DOIUrl":"https://doi.org/10.1111/1462-2920.70140","url":null,"abstract":"Considering the increasing reports of Salmonella enterica strains resistant to quinolones, antimicrobials frequently employed as therapeutic agents globally, our goal was to investigate the occurrence of plasmid-mediated quinolone resistance (PMQR) determinants in S. enterica recovered from natural surface waters in Paraíba state, Brazil. Water samples (n = 230) were collected monthly in triplicate using modified Moore swabs from 29 sampling sites belonging to 10 large dams. After conventional microbial isolation, representative isolates (n = 938) were submitted to whole genome sequencing, assembly and annotation. Antimicrobial resistance genes (ARGs) were identified, and core genome multilocus sequence typing (cgMLST) was used to infer phylogenetic relationships. Among recovered S. enterica, 130 (13.9%) isolates harboured PMQR determinants; 124 (95.4%) harboured qnrB19, while 6 (4.6%) harboured qnrS1. Multiple other ARGs associated with resistance to aminoglycosides, β-lactams, sulphonamides, tetracyclines and fosfomycin were identified. The diversity of ARGs and plasmids suggests a highly complex resistance landscape. Phylogenetic analysis revealed clustering by serovar and sequence type but not by resistance profile or geographic origin. The absence of association between phylogeny and ARGs highlights the potential role of horizontal gene transfer in disseminating resistance genes in water. Our findings reinforce the importance of antimicrobial resistance surveillance in surface waters.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70140","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Structure and Function Features of Abundant and Rare Prokaryotic Communities Along Nearshore to Offshore Transitions 近岸向近海过渡中丰富和稀有原核生物群落的结构和功能特征

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-07 DOI: 10.1111/1462-2920.70144

Mengjie Wu, Tingrui Zhang, Shuo Han, Shengxin Huan, Yuelu Jiang, Yong Wang, Zhonghua Cai, Jin Zhou

{"title":"Structure and Function Features of Abundant and Rare Prokaryotic Communities Along Nearshore to Offshore Transitions","authors":"Mengjie Wu, Tingrui Zhang, Shuo Han, Shengxin Huan, Yuelu Jiang, Yong Wang, Zhonghua Cai, Jin Zhou","doi":"10.1111/1462-2920.70144","DOIUrl":"https://doi.org/10.1111/1462-2920.70144","url":null,"abstract":"<div>\u0000 \u0000 Abundant and rare taxa are crucial members of the marine microbial community. However, their biodiversity, assembly mechanisms, functional characteristics and ecological response strategies remain poorly understood. In this study, 16S rRNA and metagenomic sequencing were carried out to reveal the structural and functional features of abundant and rare taxa across the transition from nearshore to offshore. The results showed that the biodiversity of both abundant and rare taxa decreased with increasing distance from shore, with rare taxa exhibiting relatively higher diversity indices than abundant ones. Neutral model analysis revealed that the assembly process gradually changed from deterministic to stochastic from nearshore to offshore among abundant taxa. In contrast, among rare taxa, a stochastic process dominated nearshore, whereas a deterministic process was predominant in the offshore environment. Meanwhile, the proportion of variance that could be explained by environmental factors was relatively higher among abundant communities than among rare ones. A co-occurrence network analysis indicated that rare communities displayed greater complexity and a higher degree of modularity than abundant communities. Functionally, abundant communities tended to favour an r-strategy, whereas rare communities leaned towards a K-strategy. Our results strengthen the understanding of the ecological mechanisms controlling microbial community patterns along coastal-to-open water transitions.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144573766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Successful Transmission and Isolation of a Fungal Pathogen From Wild Frogs to a Captive Amphibian Model Species: Fine Scale Pathogen Genetic Diversity and Infection-Induced Changes in Skin Bacteria 一种真菌病原体从野生青蛙到圈养两栖动物模型物种的成功传播和分离：细尺度病原体遗传多样性和感染诱导皮肤细菌的变化

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-03 DOI: 10.1111/1462-2920.70136

Tamilie Carvalho, Daniel Medina, Timothy Y. James

{"title":"Successful Transmission and Isolation of a Fungal Pathogen From Wild Frogs to a Captive Amphibian Model Species: Fine Scale Pathogen Genetic Diversity and Infection-Induced Changes in Skin Bacteria","authors":"Tamilie Carvalho, Daniel Medina, Timothy Y. James","doi":"10.1111/1462-2920.70136","DOIUrl":"https://doi.org/10.1111/1462-2920.70136","url":null,"abstract":"Amphibian populations worldwide are severely threatened, in part, by the pathogenic fungus Batrachochytrium dendrobatidis (Bd). While Bd has driven many amphibian declines and extinctions, its impact varies, with some populations exhibiting resistance or tolerance. Understanding the mechanisms behind this variation, together with Bd genetic diversity, is crucial for conservation. We used the model organism Hymenochirus boettgeri in a lab-based transmission experiment designed to isolate Bd derived from wild amphibian hosts with low pathogen loads. Through successful transmission and subsequent isolation and genotyping, we identified multiple Bd genotypes from a single population, including a potential sexual recombinant, all belonging to the Global Panzootic Lineage (Bd-GPL). This finding contributes to evidence of ongoing genetic mixing of Bd in natural environments. Additionally, we leveraged this experiment to assess Bd-induced changes in amphibian skin bacteria. Our results showed significant changes in the skin bacterial communities of H. boettgeri after acquiring Bd infection, including reductions in bacterial diversity, and shifts in community composition, as observed in others susceptible species. These findings highlight the value of transmission experiments in isolating Bd from wild hosts and underscore the potential of H. boettgeri as a model to investigate Bd genetic diversity and host-associated microbiome responses to infection.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70136","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Deterioration of Masonry Cultural Relics by Microbes: Current Remediation Strategies and Prospects 微生物对砖石文物破坏的修复策略与展望

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-03 DOI: 10.1111/1462-2920.70142

Sheng Xiong, Yuzhe Xu, Ji Zhou

{"title":"Deterioration of Masonry Cultural Relics by Microbes: Current Remediation Strategies and Prospects","authors":"Sheng Xiong, Yuzhe Xu, Ji Zhou","doi":"10.1111/1462-2920.70142","DOIUrl":"https://doi.org/10.1111/1462-2920.70142","url":null,"abstract":"We review the mechanism of microbial deterioration of masonry cultural relics and their protective strategies. Firstly, the biogeochemical and biogeophysical mechanisms of microbial deterioration of cultural relics are described, including microbial colonisation, biofilm formation, inorganic and organic acid secretion and salt crystallisation. Then, this work introduces a variety of microbial deterioration prevention strategies, including biological control, chemical protection, physical and mechanical removal technology and the application of advanced materials. Finally, we discuss the application potential of advanced materials, such as nano-antibacterial materials and functional polymer materials in the protection of cultural relics, which can not only effectively isolate the colonisation of external microbes but also enhance the contamination resistance of cultural relics surfaces. Future studies should further explore the specific mechanism of microbial deterioration on cultural relics of different materials and combine protection technology with environmental factors to achieve long-term effective protection of cultural relics.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144536908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Sediments From a Seasonally Euxinic Coastal Ecosystem Show High Nitrogen Cycling Potential 季节性富氧海岸生态系统沉积物显示出高氮循环潜力

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70139

Isabel M. L. Rigutto, Ştefania C. Sburlan, Lars W. P. de Bont, Tom Berben, Rob M. de Graaf, Caroline P. Slomp, Mike S. M. Jetten

{"title":"Sediments From a Seasonally Euxinic Coastal Ecosystem Show High Nitrogen Cycling Potential","authors":"Isabel M. L. Rigutto, Ştefania C. Sburlan, Lars W. P. de Bont, Tom Berben, Rob M. de Graaf, Caroline P. Slomp, Mike S. M. Jetten","doi":"10.1111/1462-2920.70139","DOIUrl":"https://doi.org/10.1111/1462-2920.70139","url":null,"abstract":"Coastal ecosystems are susceptible to eutrophication and deoxygenation, which may alter their nitrogen cycle dynamics. Here, we investigated the microbial nitrogen cycling potential in the sediment of a seasonally euxinic coastal ecosystem (Lake Grevelingen, NL) in winter and summer. Activity tests revealed ammonium (NH4+) oxidation potential with maximum potential rates up to 53 μmol g−1 day−1, even in anoxic sediment layers. A nitrifying microbial community was present in both oxic and anoxic sediment sections (up to 1.4% relative abundance). Nitrate (NO3−), nitrite (NO2−), and nitrous oxide (N2O) reduction potential were prominent across all sediment sections, with the highest potential rates (167 μmol NO3−∙g−1 day−1) in the surface sediment in summer. Denitrification (79.3%–98.4%) and dissimilatory nitrate reduction to ammonium (DNRA; 1.6%–20.7%) were the major NO3− removal pathways, as supported by the detection of the narG/napA, nirK/nirS, norB, nosZ and nrfA/otr genes in all sediment sections. The DNRA contribution increased with depth and with the addition of electron donors, such as monomethylamine. Anaerobic ammonium oxidation (anammox) was not detected in these eutrophic sediments. Combined, our results show that there is high potential for nitrogen removal in eutrophic coastal ecosystems, which may help further restoration measures.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70139","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Molecular Insight Into the Hydrolysis of Phthalate Esters by a Family IV Esterase 一类酯酶水解邻苯二甲酸酯的分子研究

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70134

Zhen Rong, Li-Guo Hong, Ying-Yi Huo, Jixi Li, Dao-Qiong Zheng, Yang Ha, Jeffrey Fan, Xue-Wei Xu, Yue-Hong Wu

{"title":"Molecular Insight Into the Hydrolysis of Phthalate Esters by a Family IV Esterase","authors":"Zhen Rong, Li-Guo Hong, Ying-Yi Huo, Jixi Li, Dao-Qiong Zheng, Yang Ha, Jeffrey Fan, Xue-Wei Xu, Yue-Hong Wu","doi":"10.1111/1462-2920.70134","DOIUrl":"https://doi.org/10.1111/1462-2920.70134","url":null,"abstract":"<div>\u0000 \u0000 Phthalate esters (PAEs) are prevalent environmental contaminants, with their biodegradation efficiently driven by microorganisms through ester bond hydrolysis. This study investigates the mechanism of Poc14, a novel family IV esterase, using x-ray crystallography, bioinformatics, biochemistry and site-directed mutagenesis. Phylogenetic analysis classifies Poc14 as a family IV esterase with conserved catalytic motifs crucial for its activity. Poc14 retains over 80% activity at 50°C for 4 h and tolerates up to 5% methanol or DMF, though surfactants like Tweens inhibit its function. Poc14 activity is independent of metal ions, and the addition of EDTA further enhances its activity by approximately 130%. The 1.8 Å crystal structure reveals a CAP domain and two substrate channels. Enzyme assays show Poc14 hydrolyses short-chain diethyl phthalate (DEP) (Km = 0.068 mM, Vmax = 9975 μM/min/mg) but not long-chain di(2-ethylhexyl) phthalate (DEHP) due to steric hindrance. Molecular docking assessed Poc14's potential to hydrolyse DEP and DEHP after residue mutations, resulting in the Poc14-AAG variant. Poc14-AAG could hydrolyse one bond of DEHP and diester bonds of DEP. Our study positions Poc14 as a promising enzyme for environmental remediation, with potential for optimising DEHP degradation and exploring dimerisation effects.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Skin Bacteriome Structure and Batrachochytrium dendrobatidis Prevalence Differs Amongst Two Sympatric Salamanders in the San Francisco Bay Area 旧金山湾区两种同域蝾螈皮肤菌群结构和树突壶菌流行率的差异

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70131

Aria Norwood, Jadyn Jamora, Micuel Madison, Jamiee Nguyen, Azan Yousaf, Katya Morales, Emily Vu, Obed Hernández-Gómez

{"title":"Skin Bacteriome Structure and Batrachochytrium dendrobatidis Prevalence Differs Amongst Two Sympatric Salamanders in the San Francisco Bay Area","authors":"Aria Norwood, Jadyn Jamora, Micuel Madison, Jamiee Nguyen, Azan Yousaf, Katya Morales, Emily Vu, Obed Hernández-Gómez","doi":"10.1111/1462-2920.70131","DOIUrl":"https://doi.org/10.1111/1462-2920.70131","url":null,"abstract":"<div>\u0000 \u0000 Microbial surveys are becoming an important component of wildlife health research, especially in cases where environmental change and infectious diseases are serious issues. Amongst amphibians, Batrachochytrium spp. have the potential to be fatal pathogens that can impact the population health of numerous species. We assessed the skin bacteriome, prevalence of Batrachochytrium dendrobatidis (Bd) and body conditions of two salamander genera with different life histories: the California slender salamander (Batrachoseps attenuatus) and members of the Pacific newt species complex (Taricha torosa and Taricha granulosa; Taricha sp.). We used 16S rRNA V4 amplicon sequencing to characterise the bacterial communities. Taricha sp. had higher prevalence and loads of Bd compared to B. attenuatus, although the prevalence of Bd was restricted to two of the four regions tested. Both salamander types possessed similar bacterial community richness, and the composition of the skin bacteriome varied mostly by region. However, we did find certain associations between the salamander genera and certain ASVs, with mostly members of the family Burkholderiaceae driving the difference. Our results provide additional evidence for the presence of structure in Bd prevalence and bacteriome composition amongst sympatric amphibians that inhabit different microhabitats.\u0000 </div>","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The Larval and Adult Female Gut Microbiomes of Two Burying Beetles (Nicrophorus spp.) With Distinct Parental Care Traits 两种具有不同亲代抚育特征的埋虫幼虫和成虫肠道微生物组

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-07-02 DOI: 10.1111/1462-2920.70137

Paul A. Ayayee, Bincy Sunny, Kristi L. Montooth, Claudia M. Rauter

{"title":"The Larval and Adult Female Gut Microbiomes of Two Burying Beetles (Nicrophorus spp.) With Distinct Parental Care Traits","authors":"Paul A. Ayayee, Bincy Sunny, Kristi L. Montooth, Claudia M. Rauter","doi":"10.1111/1462-2920.70137","DOIUrl":"https://doi.org/10.1111/1462-2920.70137","url":null,"abstract":"Burying beetles (Nicrophorus spp.) exhibit parental care behaviours well-suited for studying gut microbiome and holobiont evolution. Theory predicts that differences in transmission can contribute to gut microbiome variations. We show that microbiome diversity estimates were comparable between reproductive females of common-garden-reared colonies of Nicrophorus marginatus (facultative parental care) and Nicrophorus orbicollis (obligate parental care). In contrast, the respective associated larvae of both species differed significantly. Furthermore, larval microbiomes clustered with respective adult female microbiomes but differed from each other. Fifteen bacterial families underscored differences in community composition between beetle species, with Wohlfahrtiimonadaceae significantly more abundant in N. orbicollis than N. marginatus. Results suggest that differences in parental transmission (trophallaxis) and larval acquisition of microbes possibly impact the parental-offspring gut microbiome dynamic. Close association of parental and larval microbiomes in the facultative parental care species is attributed to environmental acquisition from prepared carcasses and limited trophallaxis in larvae. However, the distinct larval and parental microbiomes in the obligate parental care species are attributed to the selective sorting of functionally relevant microbes from parents in larvae. Further examination of this genus's parental care behaviours and gut microbiome dynamics may offer insight into the possible evolutionary and ecological implications and general outcomes.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 7","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70137","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144524583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Saprotrophic Capabilities of Neurospora crassa on Charred Plant Biomass 粗草神经孢子虫对烧焦植物生物量腐养能力的研究

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-24 DOI: 10.1111/1462-2920.70132

Hunter J. Simpson, Jonathan S. Schilling

{"title":"Saprotrophic Capabilities of Neurospora crassa on Charred Plant Biomass","authors":"Hunter J. Simpson, Jonathan S. Schilling","doi":"10.1111/1462-2920.70132","DOIUrl":"https://doi.org/10.1111/1462-2920.70132","url":null,"abstract":"Neurospora crassa is a popular model organism for laboratory research, yet its natural ecology remains mysterious. Its proliferation on charred plant biomass (wood and grasses) in fire-affected environments is often linked to the heat tolerance or heat−/chemical-induced germination of N. crassa spores; however, this link is not consistent across ecosystems or substrate types. Another possible, yet unvalidated, explanation is that N. crassa has an enhanced capacity for degrading charred (i.e., pyrolyzed) plant biomass. We assessed this adaptation for N. crassa by quantifying the decay of wood and grasses that were pyrolyzed to relevant extents (untreated, heated at 225°C or 350°C for 20 min) and by comparing this decay with non-fire-associated fungi. Neurospora crassa did not have an enhanced ability to degrade pyrolyzed substrates. Additionally, N. crassa struggled to degrade any wood substrate (< 6% mass loss) but did degrade untreated grasses (> 20% mass loss). These results, paired with chemical analyses of substrates pre- and post-decay, support a fire-response strategy for N. crassa, rather than a fire-adaptive ability to degrade charred substrates. This fungus likely proliferates on charred biomass by rapidly colonising heat-sterilised substrates after heat- or smoke-induced spore germination and then consuming unpyrolyzed lignocellulose beneath a charred exterior.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

New Insights Into Epiphytic Biofilm Formation, Composition, and Their Role in Submerged Macrophyte Decline Under Environmental Pollution 附生生物膜的形成、组成及其在环境污染下沉水植物衰退中的作用的新认识

IF 4.3 2区生物学

Environmental microbiology Pub Date : 2025-06-24 DOI: 10.1111/1462-2920.70121

Jiaqing Xu, Juan Pablo Pacheco Esnal, Ling Jin, Qihang Wu, Changqun Duan, Ying Pan, Torben L. Lauridsen

{"title":"New Insights Into Epiphytic Biofilm Formation, Composition, and Their Role in Submerged Macrophyte Decline Under Environmental Pollution","authors":"Jiaqing Xu, Juan Pablo Pacheco Esnal, Ling Jin, Qihang Wu, Changqun Duan, Ying Pan, Torben L. Lauridsen","doi":"10.1111/1462-2920.70121","DOIUrl":"https://doi.org/10.1111/1462-2920.70121","url":null,"abstract":"Over evolutionary time, submerged macrophytes and their epiphytic biofilms have developed complex interactions, particularly mutualistic interactions. However, environmental pollution can alter biofilms, potentially shifting their influence from supportive to neutral or even inhibitory. This change may be one of the significant driving factors for the decline of submerged macrophytes, yet a systematic review of this phenomenon is still lacking. To this end, we examine the formation and composition of epiphytic biofilms, summarize their effects on submerged macrophyte growth in freshwater lakes, and discuss how they mediate plant changes under increasing exposure to environmental pollution. Epiphytic biofilms, composed of complex biotic and abiotic components, influence submerged macrophytes by modifying light conditions and gas exchange, modulating nutrient competition and antioxidant responses, and releasing allelopathic substances; the magnitude of these effects varies with the biofilm's composition. Environmental pollution might favor resistant or fast-growing species that better compete for nutrients, impair light capture and gas exchange, and release harmful allelopathic substances. This diminishes the beneficial effects of epiphytic biofilms on submerged macrophytes, sometimes even resulting in detrimental impacts. This review examines how environmental pollution alters epiphytic biofilm composition and influences submerged macrophyte communities, providing novel insights into the dynamics of submerged macrophyte communities.","PeriodicalId":11898,"journal":{"name":"Environmental microbiology","volume":"27 6","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1462-2920.70121","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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