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Identification of virulence-associated factors in Vibrio parahaemolyticus with special reference to moonlighting protein: a secretomics study. 副溶血性弧菌毒力相关因子的鉴定,特别是月光蛋白:一项分泌组学研究。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-09-13 DOI: 10.1007/s10123-023-00429-y
Prasenjit Paria, Hirak Jyoti Chakraborty, Abhijit Pakhira, Manoharmayum Shaya Devi, Pradeep Kumar Das Mohapatra, Bijay Kumar Behera
{"title":"Identification of virulence-associated factors in Vibrio parahaemolyticus with special reference to moonlighting protein: a secretomics study.","authors":"Prasenjit Paria, Hirak Jyoti Chakraborty, Abhijit Pakhira, Manoharmayum Shaya Devi, Pradeep Kumar Das Mohapatra, Bijay Kumar Behera","doi":"10.1007/s10123-023-00429-y","DOIUrl":"10.1007/s10123-023-00429-y","url":null,"abstract":"<p><p>Vibrio parahaemolyticus causes seafood-borne gastroenteritis infection in human which can even lead to death. The pathogenic strain of V. parahaemolyticus secretes different types of virulence factors that are directly injected into the host cell by a different type of secretion system which helps bacteria to establish its own ecological niche within the organism. Therefore, the aim of this study was to isolate the extracellular secreted proteins from the trh positive strain of V. parahaemolyticus and identify them using two-dimensional gel electrophoresis and MALDI-TOFMS/MS. Seventeen different cellular proteins viz, Carbamoyl-phosphate synthase, 5-methyltetrahydropteroyltriglutamate, tRNA-dihydrouridine synthase, Glycerol-3-phosphate dehydrogenase, Orotidine 5'-phosphate decarboxylase, Molybdenum import ATP-binding protein, DnaJ, DNA polymerase IV, Ribosomal RNA small subunit methyltransferase G, ATP synthase subunit delta and gamma, Ribosome-recycling factor, 4-hydroxy-3-methylbut-2-en-1-yl diphosphate synthase, tRNA pseudouridine synthase B, Ditrans, polycis-undecaprenyl-diphosphate synthase, Oxygen-dependent coproporphyrinogen-III oxidase, and Peptide deformylase 2 were identified which are mainly involved in different metabolic and biosynthetic pathways. Furthermore, the molecular function of the identified proteins were associated with catalytic activity, ligase activity, transporter, metal binding, and ATP synthase when they are intercellular. However, to understand the importance of these secreted proteins in the infection and survival of bacteria inside the host cell, pathogen-host protein-protein interactions (PPIs) were carried out which identified the association of eight secreted proteins with 41 human proteins involved in different cellular pathways, including ubiquitination degradation, adhesion, inflammation, immunity, and programmed cell death. The present study provides unreported strategies on host-cell environment's survival and adaptation mechanisms for the successful establishment of infections and intracellular propagation.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10225814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
"Candidatus Intestinibacterium parameciiphilum"-member of the "Candidatus Paracaedibacteraceae" family (Alphaproteobacteria, Holosporales) inhabiting the ciliated protist Paramecium. "鹦鹉螺肠杆菌"(Candidatus Intestinibacterium parameciiphilum)--"鹦鹉螺肠杆菌 "科(Alphaproteobacteria,Holosporales)成员,栖息于纤毛虫鹦鹉螺中。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-08-24 DOI: 10.1007/s10123-023-00414-5
Olivia Lanzoni, Franziska Szokoli, Martina Schrallhammer, Elena Sabaneyeva, Sascha Krenek, Thomas G Doak, Franco Verni, Thomas U Berendonk, Michele Castelli, Giulio Petroni
{"title":"\"Candidatus Intestinibacterium parameciiphilum\"-member of the \"Candidatus Paracaedibacteraceae\" family (Alphaproteobacteria, Holosporales) inhabiting the ciliated protist Paramecium.","authors":"Olivia Lanzoni, Franziska Szokoli, Martina Schrallhammer, Elena Sabaneyeva, Sascha Krenek, Thomas G Doak, Franco Verni, Thomas U Berendonk, Michele Castelli, Giulio Petroni","doi":"10.1007/s10123-023-00414-5","DOIUrl":"10.1007/s10123-023-00414-5","url":null,"abstract":"<p><p>Protists frequently host diverse bacterial symbionts, in particular those affiliated with the order Holosporales (Alphaproteobacteria). All characterised members of this bacterial lineage have been retrieved in obligate association with a wide range of eukaryotes, especially multiple protist lineages (e.g. amoebozoans, ciliates, cercozoans, euglenids, and nucleariids), as well as some metazoans (especially arthropods and related ecdysozoans). While the genus Paramecium and other ciliates have been deeply investigated for the presence of symbionts, known members of the family \"Candidatus Paracaedibacteraceae\" (Holosporales) are currently underrepresented in such hosts. Herein, we report the description of \"Candidatus Intestinibacterium parameciiphilum\" within the family \"Candidatus Paracaedibacteraceae\", inhabiting the cytoplasm of Paramecium biaurelia. This novel bacterium is almost twice as big as its relative \"Candidatus Intestinibacterium nucleariae\" from the opisthokont Nuclearia and does not present a surrounding halo. Based on phylogenetic analyses of 16S rRNA gene sequences, we identified six further potential species-level lineages within the genus. Based on the provenance of the respective samples, we investigated the environmental distribution of the representatives of \"Candidatus Intestinibacterium\" species. Obtained results are consistent with an obligate endosymbiotic lifestyle, with protists, in particular freshwater ones, as hosts. Thus, available data suggest that association with freshwater protists could be the ancestral condition for the members of the \"Candidatus Intestinibacterium\" genus.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11144129/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10050963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Utilization of diverse oligosaccharides for growth by Bifidobacterium and Lactobacillus species and their in vitro co-cultivation characteristics. 双歧杆菌和乳酸杆菌利用不同低聚糖生长及其体外共培养特性。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-11-09 DOI: 10.1007/s10123-023-00446-x
Yao Dong, Mei Han, Teng Fei, Huan Liu, Zhonghui Gai
{"title":"Utilization of diverse oligosaccharides for growth by Bifidobacterium and Lactobacillus species and their in vitro co-cultivation characteristics.","authors":"Yao Dong, Mei Han, Teng Fei, Huan Liu, Zhonghui Gai","doi":"10.1007/s10123-023-00446-x","DOIUrl":"10.1007/s10123-023-00446-x","url":null,"abstract":"<p><p>Various approaches have been used to study the relationship between prebiotics and probiotics. The utilization of different carbohydrates by probiotics depends on the biochemical properties of the enzymes and substrates required by the microbial strain. However, few studies have systematically analyzed the ability of probiotics to utilize different prebiotics. Here, we investigated the effects of prebiotics from different manufacturers on the proliferation of 13 strains of the Lactobacillus group and the genus Bifidobacterium co-cultured in vitro. Inulin, fructose-oligosaccharide (FOS), and galactose-oligosaccharide (GOS) had broad growth-promoting effects. FOS significantly promoted the proliferation of B. longum. When strains from Lactobacillus group and Bifidobacterium were co-cultured, FOS caused each strain to proliferate cooperatively. GOS was effectively used by L. rhamnosus and L. reuteri for energy and growth promotion. L. casei and L. paracasei fully metabolized inulin; these strains performed better than other strains from Lactobacillus group and Bifidobacterium. Media containing a mixture of oligosaccharides had stronger effects on the growth of B. animalis subsp. lactis, L. acidophilus, and L. rhamnosus than media containing single oligosaccharides. Thus, different oligosaccharides had different effects on the growth of probiotics, providing a scientific basis for the use of synbiotics in health and related fields.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11144146/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72014232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Staphylococcus epidermidis biofilm assembly and self-dispersion: bacteria and matrix dynamics. 表皮葡萄球菌生物膜组装和自分散:细菌和基质动力学。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-10-12 DOI: 10.1007/s10123-023-00433-2
Suzanne Jonblat, Falah As-Sadi, Kazem Zibara, Marwan El Sabban, Vera Dermesrobian, André El Khoury, Mireille Kallassy, Ali Chokr
{"title":"Staphylococcus epidermidis biofilm assembly and self-dispersion: bacteria and matrix dynamics.","authors":"Suzanne Jonblat, Falah As-Sadi, Kazem Zibara, Marwan El Sabban, Vera Dermesrobian, André El Khoury, Mireille Kallassy, Ali Chokr","doi":"10.1007/s10123-023-00433-2","DOIUrl":"10.1007/s10123-023-00433-2","url":null,"abstract":"<p><p>Staphylococcus epidermidis, despite being a commensal of human skin and mucosa, is a major nosocomial pathogen implicated in device-associated infections. The dissemination of infection to other body sites is related to biofilm dispersal. This study focused on the dispersion stage of S. epidermidis CIP 444 biofilm, with the assessment of biofilm matrix composition in a time-dependent experiment (7 days extended) with 3 independent repetitions, using confocal laser scanning microcopy (CLSM) in association with ZEN 3.4 blue edition, COMSTAT, and ImageJ software. SYTO-9, propidium iodide (PI), DID'OIL, FITC, and calcofluor white M2R (CFW) were used to stain biofilm components. The results indicated that the biomass of dead cells increased from 15.18 ± 1.81 µm<sup>3</sup>/µm<sup>2</sup> (day 3) to 23.15 ± 6.075 µm<sup>3</sup>/µm<sup>2</sup> (day 4), along with a decrease in alive cells' biomass from 22.75 ± 2.968 µm<sup>3</sup>/µm<sup>2</sup> (day 3) to 18.95 ± 5.713 µm<sup>3</sup>/µm<sup>2</sup> (day 4). When the intensities were measured after marking the biofilm components, in a 24-h-old biofilm, polysaccharide made up the majority of the investigated components (52%), followed by protein (18.9%). Lipids make up just 11.6% of the mature biofilm. Protein makes up the largest portion (48%) of a 4-day-old biofilm, followed by polysaccharides (37.8%) and lipids (7.27%). According to our findings, S. epidermidis CIP 444 dispersion occurred on day 4 of incubation, and new establishment of the biofilm occurred on day 7. Remarkable changes in biofilm composition will pave the way for a new approach to understanding bacterial strategies inside biofilms and finding solutions to their impacts in the medical field.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41201046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Reclamation of chromium-contaminated soil by native Cr(VI)-reducing and PHA-accumulating Bacillus aryabhattai CTSI-07. 利用原生六价铬还原和 PHA 积累芽孢杆菌 CTSI-07 改造铬污染土壤。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-09-07 DOI: 10.1007/s10123-023-00421-6
Swati Pattnaik, Debasis Dash, Swati Mohapatra, Swayamsidha Pati, Deepika Devadarshini, Swati Samal, Matrujyoti Pattnaik, Sudipta Maity, Sumanta K Mishra, Deviprasad Samantaray
{"title":"Reclamation of chromium-contaminated soil by native Cr(VI)-reducing and PHA-accumulating Bacillus aryabhattai CTSI-07.","authors":"Swati Pattnaik, Debasis Dash, Swati Mohapatra, Swayamsidha Pati, Deepika Devadarshini, Swati Samal, Matrujyoti Pattnaik, Sudipta Maity, Sumanta K Mishra, Deviprasad Samantaray","doi":"10.1007/s10123-023-00421-6","DOIUrl":"10.1007/s10123-023-00421-6","url":null,"abstract":"<p><p>Reclamation of chromium-contaminated soil by bacteria is a big confront concerning to soil health restoration, food safety, and environmental protection. Herein, the chromium-resistant Bacillus aryabhattai CTSI-07 (MG757377) showed resistance to 1000 and 300 ppm of Cr(VI) in nutrient rich Luria Bertani (LB) and nutrient-deficient sucrose low phosphate (SLP) medium, respectively. It reduced 96.7% of Cr(VI) from contaminated soil in the presence of 100 ppm of Mg within 96 h under optimized conditions. Furthermore, Cr(VI) reduction by the bacteria was validated by Fourier transform infrared spectroscopic (FTIR) and X-ray diffraction (XRD) analysis. Besides Cr(VI) reduction, the bacterial strain also showed plant growth promoting traits like N<sub>2</sub> fixation and indole acetic acid (IAA) production. On the other hand, transmission electron microscopy (TEM) imaging confirmed polyhydroxyalkanoates' (PHAs) granule accumulation and 0.5 g/l of PHAs was extracted from bacterial cell using SLP medium. Infra-red (IR) spectra and proton nuclear magnetic resonance (<sup>1</sup>H NMR) chemical shift patterns established the PHAs as polyhydroxybutyrate (PHB). Melting (Tm) and thermal degradation (Td) temperature of the PHB were 169 °C and 275 °C, respectively, as evident from thermogravimetry differential thermal analysis (TG-DTA). Atomic force microscopic (AFM) imaging depicted that the PHB film surface was rough and regular. Furthermore, the multi-metal-resistant, plant growth-promoting, and PHB-producing bacteria could reduce 99.82% of Cr(VI) from contaminated soil within 120 days in pot culture. Thus, it can be used for long-term reclamation of chromium-contaminated soil to restore soil health, provide food safety, and environmental protection.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10542765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Microbial degradation of the benzimidazole fungicide carbendazim by Bacillus velezensis HY-3479. Velezensis HY-3479 杆菌对苯并咪唑类杀菌剂多菌灵的微生物降解。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-09-15 DOI: 10.1007/s10123-023-00427-0
Suyoung Song, Cher-Won Hwang
{"title":"Microbial degradation of the benzimidazole fungicide carbendazim by Bacillus velezensis HY-3479.","authors":"Suyoung Song, Cher-Won Hwang","doi":"10.1007/s10123-023-00427-0","DOIUrl":"10.1007/s10123-023-00427-0","url":null,"abstract":"<p><p>Carbendazim (methyl benzimidazol-2-ylcarbamate: MBC) is a fungicide of the benzimidazole group that is widely used in the cultivation of pepper, ginseng, and many other crops. To remove the remnant carbendazim, many rhizobacteria are used as biodegradation agents. A bacterial strain of soil-isolated Bacillus velezensis HY-3479 was found to be capable of degrading MBC in M9 minimal medium supplemented with 250 mg/L carbendazim. The strain had a significantly higher degradation efficiency compared to the control strain Bacillus subtilis KACC 15590 in high-performance liquid chromatography (HPLC) analysis, and HY-3479 had the best degradation efficiency of 76.99% at 48 h. In gene expression analysis, upregulation of carbendazim-degrading genes (mheI, hdx) was observed in the strain. HY-3479 was able to use MBC as the sole source of carbon and nitrogen, but the addition of 12.5 mM NH<sub>4</sub>NO<sub>3</sub> significantly increased the degradation efficiency. HPLC analysis showed that the degradation efficiency increased to 87.19% when NH<sub>4</sub>NO<sub>3</sub> was added. Relative gene expression of mheI and hdx also increased for samples with NH<sub>4</sub>NO<sub>3</sub> supplementation. The enzyme activity of the carbendazim-degrading enzyme and the 2-aminobenzimidazole-degrading enzyme was found to be highly present in the HY-3479 strain. It is the first reported B. velezensis strain to biodegrade carbendazim (MBC). The biodegradation activity of strain HY-3479 may be developed as a useful means for bioremediation and used as a potential microbial agent in sustainable agriculture.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10591143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 serine-arginine (SR) protein UmRrm75 from Ustilago maydis is a functional ortholog of yeast ScHrb1. 玉米黑罗非鱼丝氨酸精氨酸(SR)蛋白UmRrm75是酵母ScHrb1的功能同源物。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-09-30 DOI: 10.1007/s10123-023-00432-3
Alma Laura Rodríguez-Piña, Enrique Castaño de la Serna, Juan Francisco Jiménez-Bremont
{"title":"The serine-arginine (SR) protein UmRrm75 from Ustilago maydis is a functional ortholog of yeast ScHrb1.","authors":"Alma Laura Rodríguez-Piña, Enrique Castaño de la Serna, Juan Francisco Jiménez-Bremont","doi":"10.1007/s10123-023-00432-3","DOIUrl":"10.1007/s10123-023-00432-3","url":null,"abstract":"<p><p>The Basidiomycete fungus Ustilago maydis is a biotrophic pathogen of maize. The U. maydis UmRrm75 gene encodes an RNA-binding protein (RBP). In a previous study, we reported that ΔUmRrm75 null mutant strains accumulate H<sub>2</sub>O<sub>2</sub>, exhibit slow growth, and have decreased virulence in maize. Herein, we describe UmRrm75 as an ortholog of the ScHrb1, a serine-arginine (SR) protein identified in the yeast Saccharomyces cerevisiae, which plays a role in nuclear quality control, specifically in mRNA splicing and export processes. The yeast ScHrb1 mutant (ΔScHrb1) exhibits an increased sensitivity to elevated levels of boron. We noticed that the ΔScHrb1 displayed sensitivity to H<sub>2</sub>O<sub>2</sub>, which is consistent with previous findings in the ΔUmRrm75 mutant. We reversed the sensitivity phenotypes of boron and H<sub>2</sub>O<sub>2</sub> by introducing the UmRrm75 gene into the ΔScHrb1 mutant. Furthermore, we generated complementary strains of U. maydis by expressing UmRrm75-GFP under its native promoter in the ∆UmRrm75 mutants. The UmRrm75-GFP/∆UmRrm75 complementary strains successfully recovered their growth capability under stressors, H<sub>2</sub>O<sub>2</sub> and boron, resembling the parental strains FB2 and AB33. The subcellular localization experiments conducted in U. maydis revealed that the UmRrm75 protein is localized within the nucleus of both yeast and hyphae. The nuclear localization of the UmRrm75 protein remains unaltered even under conditions of heat or oxidative stress. This suggests that UmRrm75 might perform its RBP activity in the nucleus, as previously reported for ScHrb1. Our data contribute to understanding the role of the nuclear RBP UmRrm75 from the corn smut fungus U. maydis.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41132655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Revealing bacterial and fungal communities of the untapped forest and alpine grassland zones of the Western-Himalayan region. 揭示西喜马拉雅地区未开发森林和高山草原区的细菌和真菌群落。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-09-14 DOI: 10.1007/s10123-023-00430-5
Aayushi Rambia, Chandra Veluchamy, Janhvi Mishra Rawat, Mahendra D Jamdhade, Sumit Purohit, Kiran D Pawar, Chandrasekaran Rajasekaran, Balwant Rawat, Avinash Sharma
{"title":"Revealing bacterial and fungal communities of the untapped forest and alpine grassland zones of the Western-Himalayan region.","authors":"Aayushi Rambia, Chandra Veluchamy, Janhvi Mishra Rawat, Mahendra D Jamdhade, Sumit Purohit, Kiran D Pawar, Chandrasekaran Rajasekaran, Balwant Rawat, Avinash Sharma","doi":"10.1007/s10123-023-00430-5","DOIUrl":"10.1007/s10123-023-00430-5","url":null,"abstract":"<p><p>The Western Himalayas offer diverse environments for investigating the diversity and distribution of microbial communities and their response to both the abiotic and biotic factors across the entire altitudinal gradient. Such investigations contribute significantly to our understanding of the complex ecological processes that shape microbial diversity. The proposed study focuses on the investigation of the bacterial and fungal communities in the forest and alpine grasslands of the Western Himalayan region, as well as their relationship with the physicochemical parameters of soil. A total of 185 isolates were obtained using the culture-based technique belonging to Bacillus (37%), Micrococcus (16%), and Staphylococcus (7%). Targeted metagenomics revealed the abundance of bacterial phyla Pseudomonadota (23%) followed by Acidobacteriota (20.2%), Chloroflexota (15%), and Bacillota (11.3%). At the genera level, CandidatusUdaeobacter (6%), Subgroup_2 (5.5%) of phylum Acidobacteriota, and uncultured Ktedonobacterales HSB_OF53-F07 (5.2%) of Choloroflexota phylum were found to be preponderant. Mycobiome predominantly comprised of phyla Ascomycota (54.1%), Basidiomycota (24%), and Mortierellomycota (19.1%) with Archaeorhizomyces (19.1%), Mortierella (19.1%), and Russula (5.4%) being the most abundant genera. Spearman's correlation revealed that the bacterial community was most influenced by total nitrogen in the soil followed by soil organic carbon as compared to other soil physicochemical factors. The study establishes a fundamental relationship between microbial communities and the physicochemical properties of soil. Furthermore, the study provides valuable insights into the complex interplay between biotic and abiotic factors that influence the microbial community composition of this unique region across various elevations.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10599206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Isolation and characterization of a newly chrysene-degrading Achromobacter aegrifaciens. 一株新的能降解chrysene的灰纹无色杆菌的分离与鉴定。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-10-18 DOI: 10.1007/s10123-023-00435-0
Assia Lazzem, Abdelmalek Lekired, Hadda-Imene Ouzari, Ahmed Landoulsi, Abdelwaheb Chatti, Alya El May
{"title":"Isolation and characterization of a newly chrysene-degrading Achromobacter aegrifaciens.","authors":"Assia Lazzem, Abdelmalek Lekired, Hadda-Imene Ouzari, Ahmed Landoulsi, Abdelwaheb Chatti, Alya El May","doi":"10.1007/s10123-023-00435-0","DOIUrl":"10.1007/s10123-023-00435-0","url":null,"abstract":"<p><p>Polycyclic aromatic hydrocarbons (PAHs) are considered substances of potential human health hazards because of their resistance to biodegradation and carcinogenic index. Chrysene is a PAH with a high molecular weight (HMW) that poses challenges for its elimination from the environment. However, bacterial degradation is an effective, environmentally friendly, and cost-effective solution. In our study, we isolated a potential chrysene-degrading bacteria from crude oil-contaminated seawater (Bizerte, Tunisia). Based on 16SrRNA analysis, the isolate S5 was identified as Achromobacter aegrifaciens. Furthermore, the results revealed that A. aegrifaciens S5 produced a biofilm on polystyrene at 20 °C and 30 °C, as well as at the air-liquid (A-L) interface. Moreover, this isolate was able to swim and produce biosurfactants with an emulsification activity (E24%) over 53%. Chrysene biodegradation by isolate S5 was clearly assessed by an increase in the total viable count. Confirmation was obtained via gas chromatography-mass spectrometry (GC-MS) analyses. A. aegrifaciens S5 could use chrysene as its sole carbon and energy source, exhibiting an 86% degradation of chrysene on day 7. In addition, the bacterial counts reached their highest level, over 25 × 10<sup>20</sup> CFU/mL, under the conditions of pH 7.0, a temperature of 30 °C, and a rotary speed of 120 rpm. Based on our findings, A. aegrifaciens S5 can be a potential candidate for bioremediation in HMW-PAH-contaminated environments.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41235199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Paracetamol mineralization strategy in laboratory scale using Aspergillus niger KCAC. 利用黑曲霉KCAC的实验室对乙酰氨基酚矿化策略。
IF 3.1 4区 生物学
International Microbiology Pub Date : 2024-06-01 Epub Date: 2023-10-25 DOI: 10.1007/s10123-023-00439-w
Keerthishree Chandrashekar, Ankita Chatterjee, Maulin P Shah
{"title":"Paracetamol mineralization strategy in laboratory scale using Aspergillus niger KCAC.","authors":"Keerthishree Chandrashekar, Ankita Chatterjee, Maulin P Shah","doi":"10.1007/s10123-023-00439-w","DOIUrl":"10.1007/s10123-023-00439-w","url":null,"abstract":"<p><p>The emergence of drug resistance, caused due the presence of pharmaceutical contaminant in the environment, highlights the critical need for pharmaceutical drugs management. Pharmaceutical drugs are sourced in wastewater as pharmaceutical industrial effluents, antibiotic misuse, and inappropriate disposal of expired pharmaceuticals, eventually ending up in sewage deposition. In this work, we aimed to degrade paracetamol (APAP) through the mycoremediation approach in laboratory scale. The isolated paracetamol degradation fungal strain, identified as Aspergillus niger KCAC efficiently degraded the drug into non-toxic metabolites. The results demonstrated that 99.6% degradation rate was achieved by Aspergillus niger KCAC. Unique, low-cost, eco-friendly bioformulation of the fungal isolate was prepared during the study using used vegetable cooking oil as substrate. The bioformulation showed extended shelf-life and can be used in future for large-scale application. Thus, this detailed investigation on paracetamol biodegradation may be useful in developing a wastewater treatment system effective against paracetamol-contaminated wastewater.</p>","PeriodicalId":14318,"journal":{"name":"International Microbiology","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50157916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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