Journal of Microbiology

Journal Articles

Fleagrass (Adenosma buchneroides Bonati) Acts as a Fungicide Against Candida albicans by Damaging Its Cell Wall: Youwei Wu, Hongxia Zhang, Hongjie Chen, Zhizhi Du, Qin Li, Ruirui Wang; J. Microbiol. 2024;62(8):661-670. Published online July 3, 2024; DOI: https://doi.org/10.1007/s12275-024-00146-9

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Abstract: Fleagrass, a herb known for its pleasant aroma, is widely used as a mosquito repellent, antibacterial agent, and for treating colds, reducing swelling, and alleviating pain. The antifungal effects of the essential oils of fleagrass and carvacrol against Candida albicans were investigated by evaluating the growth and the mycelial and biofilm development of C. albicans. Transmission electron microscopy was used to evaluate the integrity of the cell membrane and cell wall of C. albicans. Fleagrass exhibited high fungicidal activity against C. albicans at concentrations of 0.5% v/v (via the Ras1/cAMP/PKA pathway). Furthermore, transmission electron microscopy revealed damage to the cell wall and membrane after treatment with the essential oil, which was further confirmed by the increased levels of β-1,3-glucan and chitin in the cell wall. This study showed that fleagrass exerts good fungicidal and hyphal growth inhibition activity against C. albicans by disrupting its cell wall, and thus, fleagrass may be a potential antifungal drug.

Analysis of phylogenetic markers for classification of a hydrogen peroxide producing Streptococcus oralis isolated from saliva by a newly devised differential medium: Ha Pham , Thi Dieu Thuy Tran , Youri Yang , Jae-Hyung Ahn , Hor-Gil Hur , Yong-Hak Kim; J. Microbiol. 2022;60(8):795-805. Published online July 14, 2022; DOI: https://doi.org/10.1007/s12275-022-2261-2

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Hydrogen peroxide (H2O2) is produced by alpha-hemolytic streptococci in aerobic conditions. However, the suitable method for detection of H2O2-producing streptococci in oral microbiota has not been setup. Here we show that o-dianisidine dye and horseradish peroxidase were useful in tryptic soy agar medium to detect and isolate H2O2-producing bacteria with the detection limit of one target colony in > 106 colony-forming units. As a proof, we isolated the strain HP01 (KCTC 21190) from a saliva sample using the medium and analyzed its characteristics. Further tests showed that the strain HP01 belongs to Streptococcus oralis in the Mitis group and characteristically forms short-chain streptococcal cells with a high capacity of acid tolerance and biofilm formation. The genome analysis revealed divergence of the strain HP01 from the type strains of S. oralis. They showed distinctive phylogenetic distances in their ROS-scavenging proteins, including superoxide dismutase SodA, thioredoxin TrxA, thioredoxin reductase TrxB, thioredoxin-like protein YtpP, and glutaredoxin- like protein NrdH, as well as a large number of antimicrobial resistance genes and horizontally transferred genes. The concatenated ROS-scavenging protein sequence can be used to identify and evaluate Streptococcus species and subspecies based on phylogenetic analysis.

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Alleviation of H2O2 toxicity by extracellular catalases in the phycosphere of Microcystis aeruginosa
Yerim Park, Wonjae Kim, Yeji Cha, Minkyung Kim, Woojun Park
Harmful Algae.2024; 137: 102680. CrossRef

Regulation of iron homeostasis by peroxide-sensitive CatR, a Fur-family regulator in Streptomyces coelicolor: Yeonbum Kim , Jung-Hye Roe , Joo-Hong Park , Yong-Joon Cho , Kang-Lok Lee; J. Microbiol. 2021;59(12):1083-1091. Published online December 4, 2021; DOI: https://doi.org/10.1007/s12275-021-1457-1

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Abstract

CatR, a peroxide-sensing transcriptional repressor of Fur family, can de-repress the transcription of the catA gene encoding catalase upon peroxide stress in Streptomyces coelicolor. Since CatR-regulated genes other than catA and its own gene catR have not been identified in detail, the understanding of the role of CatR regulon is very limited. In this study, we performed transcriptomic analysis to identify genes influenced by both 􀈟􀂊atR mutation and hydrogen peroxide treatment. Through ChIP-qPCR and other analyses, a new consensus sequence was found in CatR-responsive promoter region of catR gene and catA operon for direct regulation. In addition, vtlA (SCO2027) and SCO4983 were identified as new members of the CatR regulon. Expression levels of iron uptake genes were reduced by hydrogen peroxide and a DmdR1 binding sequence was identified in promoters of these genes. The increase in free iron by hydrogen peroxide was thought to suppress the iron import system by DmdR1. A putative exporter protein VtlA regulated by CatR appeared to reduce intracellular iron to prevent oxidative stress. The name vtlA (VIT1-like transporter) was proposed for iron homeostasis related gene SCO2027.

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Structure, Function, and Biosynthesis of Siderophores Produced by Streptomyces Species
Mingxuan Wang, Honglin Li
Journal of Agricultural and Food Chemistry.2025; 73(8): 4425. CrossRef
Autonomous Defense Based on Biogenic Nanoparticle Formation in Daunomycin-Producing Streptomyces
Karel Beneš, Vladislav Čurn, Baveesh Pudhuvai, Jaroslav Motis, Zuzana Michalcová, Andrea Bohatá, Jana Lencová, Jan Bárta, Michael Rost, Andreas Vilcinskas, Vladimír Maťha
Microorganisms.2025; 13(1): 107. CrossRef
Functional versatility of Zur in metal homeostasis, motility, biofilm formation, and stress resistance in Yersinia pseudotuberculosis
Yanchao Gu, Yongde Liu, Wei Mao, Ying Peng, Xiaoru Han, Han Jin, Jingling Xu, Liyang Chang, Yixin Hou, Xihui Shen, Xingyu Liu, Yantao Yang, G. Marcela Rodriguez
Microbiology Spectrum.2024;[Epub] CrossRef
Multi-integrated approach for unraveling small open reading frames potentially associated with secondary metabolism in Streptomyces
Si-Min Fan, Ze-Qi Li, Shi-Zhe Zhang, Liang-Yu Chen, Xi-Ying Wei, Jian Liang, Xin-Qing Zhao, Chun Su, Xiao-Hua Zhang
mSystems.2023;[Epub] CrossRef
The regulatory role of Fur-encoding SCLAV_3199 in iron homeostasis in Streptomyces clavuligerus
Büşra Abanoz-Seçgin, Çiğdem Otur, Sezer Okay, Aslıhan Kurt-Kızıldoğan
Gene.2023; 878: 147594. CrossRef

The transcription factor Cas5 suppresses hyphal morphogenesis during yeast-form growth in Candida albicans: Jong-Myeong Kim , Hye Yun Moon , Dong Wook Lee , Hyun Ah Kang , Jeong-Yoon Kim; J. Microbiol. 2021;59(10):911-919. Published online September 7, 2021; DOI: https://doi.org/10.1007/s12275-021-1326-y

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Abstract

Candida albicans is an opportunistic human pathogen that exists as yeast, hyphal or pseudohyphal forms depending on pH, nutrients, and temperature. The morphological transition from yeast to hyphae, which is required for the complete virulence of C. albicans, is controlled by many transcription factors that activate or repress hypha-specific genes. The C. albicans transcriptional factor Cas5, a key regulator of genes involved in cell wall integrity, affects the susceptibility of C. albicans to fluconazole, an inhibitor of ergosterol synthesis. In this study, we found that deletion of CAS5 in C. albicans decreased the expression levels of a set of ergosterol biosynthesis genes, such as ERG2, ERG3, ERG5, ERG6, ERG11, and ERG24,
result
ing in the accumulation of lanosterol and zymosterol, which are intermediate metabolites in the ergosterol biosynthesis pathway. Interestingly, it was observed that the cas5Δ/Δ mutant could not maintain the yeast form under non-hyphainducing conditions, while the CAS5-overexpressing cells could not form hyphae under hypha-inducing conditions. Consistent with these observations, the cas5Δ/Δ mutant highly expressed hypha-specific genes, ALS3, ECE1, and HWP1, under non-hypha-inducing conditions. In addition, CAS5 transcription was significantly downregulated immediately after hyphal initiation in the wild-type strain. Furthermore, the cas5Δ/Δ mutant reduced the transcription of NRG1, which encodes a major repressor of hyphal morphogenesis, while Cas5 overexpression increased the transcription of NRG1 under hyphainducing conditions. Collectively, this study suggests the potential role of Cas5 as a repressor of hypha-specific genes during yeast-form growth of C. albicans.

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The Role of Sfp1 in Candida albicans Cell Wall Maintenance
Che-Kang Chang, Min-Chi Yang, Hsueh-Fen Chen, Yi-Ling Liao, Chung-Yu Lan
Journal of Fungi.2022; 8(11): 1196. CrossRef

Biosynthesis of adipic acid in metabolically engineered Saccharomyces cerevisiae: Xi Zhang , Yingli Liu , Jing Wang , Yunying Zhao , Yu Deng; J. Microbiol. 2020;58(12):1065-1075. Published online October 23, 2020; DOI: https://doi.org/10.1007/s12275-020-0261-7

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Abstract

Adipic Acid (AA) is a valued platform chemical compound, which can be used as a precursor of nylon-6,6. Due to the generation of an enormous amount of nitric oxide metabolites and the growing depletion of oil resources as a result of AA production from a mixture of cyclohexanol and cyclohexanone, the microbial methods for synthesizing AA have attracted significant attention. Of the several AA-producing pathways, the reverse adipate degradation pathway in Thermobifida fusca (Tfu RADP) is reported to be the most efficient, which has been confirmed in Escherichia coli. In this study, the heterologous Tfu RADP was constructed for producing AA in S. cerevisiae by co-expressing genes of Tfu_ 0875, Tfu_2399, Tfu_0067, Tfu_1647, Tfu_2576, and Tfu_ 2576. The AA titer combined with biomass, cofactors and other by-products was all determined after fermentation. During batch fermentation in a shake flask, the maximum AA titer was 3.83 mg/L, while the titer increased to 10.09 mg/L during fed-batch fermentation in a 5-L bioreactor after fermentation modification.

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Experimental, modeling and optimisation of adipic acid reactive extraction using ionic liquids
Elena Niculina Dragoi, Alexandra Cristina Blaga, Dan Cascaval, Anca Irina Galaction
Journal of Molecular Liquids.2024; 410: 125564. CrossRef
Structure sensitivity of the electrochemical hydrogenation of cis,cis-muconic acid to hexenedioic acid and adipic acid
Deep M. Patel, Prathamesh T. Prabhu, Geet Gupta, Marco Nazareno Dell'Anna, Samantha Kling, Huy T. Nguyen, Jean-Philippe Tessonnier, Luke T. Roling
Green Chemistry.2024; 26(8): 4506. CrossRef
Exploring the Potential of Bio-plasticizers: Functions, Advantages, and Challenges in Polymer Science
Felipe Martins de Souza, Ram K. Gupta
Journal of Polymers and the Environment.2024; 32(11): 5499. CrossRef
Poly (Butylene Adipate‐Co‐Terephthalate) (PBAT) – Based Biocomposites: A Comprehensive Review
Blessing E. Itabana, Amar K. Mohanty, Phil Dick, Mohini Sain, Atul Bali, Mike Tiessen, Loong‐Tak Lim, Manjusri Misra
Macromolecular Materials and Engineering.2024;[Epub] CrossRef
Comparative analysis of biotechnological and catalytic approaches to the production of organic acids
K. N. Sorokina, Y. V. Samoylova, V. N. Parmon
Kataliz v promyshlennosti.2024; 24(3): 73. CrossRef
Mid–Long Chain Dicarboxylic Acid Production via Systems Metabolic Engineering: Progress and Prospects
Shanna Gu, Fuzhou Zhu, Lin Zhang, Jianping Wen
Journal of Agricultural and Food Chemistry.2024; 72(11): 5555. CrossRef
Toward the use of mixed microbial cultures for the biological production of adipic and levulinic acid
Fernanda Pinto-Ibieta, Mara Cea, Antonio Serrano, Fernando E. Felissia, María Cristina Area, Francisco Cabrera, Gustavo Ciudad
Frontiers in Microbiology.2023;[Epub] CrossRef
Producing malonate in Saccharomyces cerevisiae via the β-alanine pathway
Shiyun Li, Wenxuan Fu, Ruifang Su, Yunying Zhao, Yu Deng
Systems Microbiology and Biomanufacturing.2023; 3(2): 328. CrossRef
Engineering yeast cell factories to produce biodegradable plastics and their monomers: Current status and prospects
Feng-Li Zhang, Lin Zhang, Du-Wen Zeng, Sha Liao, Yachao Fan, Verawat Champreda, Weerawat Runguphan, Xin-Qing Zhao
Biotechnology Advances.2023; 68: 108222. CrossRef
Sustainable Routes for the Synthesis of Renewable Adipic Acid from Biomass Derivatives
Man Lang, Hao Li
ChemSusChem.2022;[Epub] CrossRef
Research Progress on the Construction of Artificial Pathways for the Biosynthesis of Adipic Acid by Engineered Microbes
Yuchen Ning, Huan Liu, Renwei Zhang, Yuhan Jin, Yue Yu, Li Deng, Fang Wang
Fermentation.2022; 8(8): 393. CrossRef
Opportunities in the microbial valorization of sugar industrial organic waste to biodegradable smart food packaging materials
Sandhya Jayasekara, Lakshika Dissanayake, Lahiru N. Jayakody
International Journal of Food Microbiology.2022; 377: 109785. CrossRef
Implementation of Synthetic Pathways to Foster Microbe-Based Production of Non-Naturally Occurring Carboxylic Acids and Derivatives
Ana Vila-Santa, Fernão C. Mendes, Frederico C. Ferreira, Kristala L. J. Prather, Nuno P. Mira
Journal of Fungi.2021; 7(12): 1020. CrossRef

Identification and characterization of a novel light-induced promoter for recombinant protein production in Pleurotus ostreatus: Chaomin Yin , Xiuzhi Fan , Kun Ma , Zheya Chen , Defang Shi , Fen Yao , Hong Gao , Aimin Ma; J. Microbiol. 2020;58(1):39-45. Published online November 4, 2019; DOI: https://doi.org/10.1007/s12275-020-9230-4

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Abstract

A lectin gene (plectin) with a high level of expression was previously identified by comparative transcriptome analysis of Pleurotus ostreatus. In this study, we cloned a 733-bp DNA fragment from the start codon of the plectin gene. Sequence analysis showed that the plectin promoter (Plp) region contained several eukaryotic transcription factor binding motifs, such as the TATA-box, four possible CAAT-box, light responsiveness motifs and MeJA-responsiveness motifs. To determine whether the Plp promoter was a light-regulated promoter, we constructed an expression vector with the fused egfp-hph fragment under the control of the Plp promoter and transformed P. ostreatus mycelia via Agrobacterium tumefaciens. PCR and Southern blot analyses confirmed the Plpegfp- hph fragment was integrated into the chromosomal DNA of transformants. qRT-PCR, egfp visualization, and intracellular egfp determination experiments showed the Plp promoter could be a light-induced promoter that may be suitable for P. ostreatus genetic engineering. This study lays the foundation for gene homologous expression in P. ostreatus.

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The GATA transcription factor BcWCL2 regulates citric acid secretion to maintain redox homeostasis and full virulence in Botrytis cinerea
Weiheng Ren, Chen Qian, Dandan Ren, Yunfei Cai, Zhaohui Deng, Ning Zhang, Congcong Wang, Yiwen Wang, Pinkuan Zhu, Ling Xu, Regine Kahmann
mBio.2024;[Epub] CrossRef

Competition/antagonism associations of biofilm formation among Staphylococcus epidermidis Agr groups I, II, and III: Sergio Martínez-García , César I. Ortiz-García , Marisa Cruz-Aguilar , Juan Carlos Zenteno , José Martin Murrieta-Coxca , Sonia Mayra Pérez-Tapia , Sandra Rodríguez-Martínez , Mario E. Cancino-Diaz , Juan C. Cancino-Diaz; J. Microbiol. 2019;57(2):143-153. Published online January 31, 2019; DOI: https://doi.org/10.1007/s12275-019-8322-5

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Abstract

Staphylococci have quorum-sensing (QS) systems that enable cell-to-cell communication, as well as the regulation of numerous colonization and virulence factors. The accessory gene regulator (Agr) operon is one of the Staphylococcus genus QS systems. Three groups (I, II, and III) are present in Staphylococcus epidermidis Agr operon. To date, it is unknown whether Agr groups can interact symbiotically during biofilm development. This study analyzed a symbiotic association among Agr groups during biofilm formation in clinical and commensal isolates. Different combinations among Agr group isolates was used to study biofilm formation in vitro and in vivo (using a mouse catheter-infection model). The analysis of Agr groups were also performed from samples of human skin (head, armpits, and nostrils). Different predominant coexistence was found within biofilms, suggesting symbiosis type. In vitro, Agr I had a competition with Agr II and Agr III. Agr II had a competition with Agr III, and Agr II was an antagonist to Agr I and III when the three strains were combined. In vivo, Agr II had a competition to Agr I, but Agr I and II were antagonists to Agr III. The associations found in vitro and in vivo were also found in different sites of the skin. Besides, other associations were observed: Agr III antagonized Agr I and II, and Agr III competed with Agr I and Agr II. These results suggest that, in S. epidermidis, a symbiotic association of competition and antagonism occurs among different Agr groups during biofilm formation.

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The pathogenicity and virulence of the opportunistic pathogen Staphylococcus epidermidis
Órla Burke, Merve S. Zeden, James P. O’Gara
Virulence.2024;[Epub] CrossRef
Synthetic Peptides Capable of Potent Multigroup Staphylococcal Quorum Sensing Activation and Inhibition in Both Cultures and Biofilm Communities
Emma L. Eisenbraun, Troy D. Vulpis, Brendan N. Prosser, Alexander R. Horswill, Helen E. Blackwell
Journal of the American Chemical Society.2024; 146(23): 15941. CrossRef
Biofilm formation, occurrence, microbial communication, impact and characterization methods in natural and anthropic systems: a review
Punniyakotti Elumalai, Xuke Gao, Jinjie Cui, Arunagiri Santhosh Kumar, Perumal Dhandapani, Punniyakotti Parthipan, Obulisamy Parthiba Karthikeyan, Jayaraman Theerthagiri, Soorathep Kheawhom, Myong Yong Choi
Environmental Chemistry Letters.2024; 22(3): 1297. CrossRef
Analysis of the Presence of the Virulence and Regulation Genes from Staphylococcus aureus (S. aureus) in Coagulase Negative Staphylococci and the Influence of the Staphylococcal Cross-Talk on Their Functions
Magdalena Grazul, Ewa Balcerczak, Monika Sienkiewicz
International Journal of Environmental Research and Public Health.2023; 20(6): 5155. CrossRef
Staphylococcus epidermidis Controls Opportunistic Pathogens in the Nose, Could It Help to Regulate SARS-CoV-2 (COVID-19) Infection?
Silvestre Ortega-Peña, Sandra Rodríguez-Martínez, Mario E. Cancino-Diaz, Juan C. Cancino-Diaz
Life.2022; 12(3): 341. CrossRef
Direct Quantitative Immunochemical Analysis of Autoinducer Peptide IV for Diagnosing and Stratifying Staphylococcus aureus Infections
Enrique-J. Montagut, Gerardo Acosta, Fernando Albericio, Miriam Royo, Gerard Godoy-Tena, Alicia Lacoma, Cristina Prat, Juan-Pablo Salvador, María-Pilar Marco
ACS Infectious Diseases.2022; 8(3): 645. CrossRef
Non-Native Peptides Capable of Pan-Activating the agr Quorum Sensing System across Multiple Specificity Groups of Staphylococcus epidermidis
Korbin H. J. West, Wenqi Shen, Emma L. Eisenbraun, Tian Yang, Joseph K. Vasquez, Alexander R. Horswill, Helen E. Blackwell
ACS Chemical Biology.2021; 16(6): 1070. CrossRef
Clinical and molecular characteristics of Staphylococcus aureus isolated from Chinese children: association among the agr groups and genotypes, virulence genes and disease types
Yan Xu, Su-Yun Qian, Kai-Hu Yao, Fang Dong, Wen-Qi Song, Chen Sun, Xin Yang, Jing- Hui Zhen, Xi-Qing Liu, Zhi -Yong Lv, Xi Yang
World Journal of Pediatrics.2021; 17(2): 180. CrossRef
Non‐biofilm‐forming commensal Staphylococcus epidermidis isolates produce biofilm in the presence of trypsin
Sergio Martínez‐García, Silvestre Ortega‐Peña, María De Jesús De Haro‐Cruz, Ma. Guadalupe Aguilera‐Arreola, María Dolores Alcántar‐Curiel, Gabriel Betanzos‐Cabrera, Janet Jan‐Roblero, Sonia Mayra Pérez‐Tapia, Sandra Rodríguez‐Martínez, Mario E. Cancino‐Di
MicrobiologyOpen.2019;[Epub] CrossRef

An efficient Agrobacterium-mediated transformation method for aflatoxin generation fungus Aspergillus flavus: Guomin Han , Qian Shao , Cuiping Li , Kai Zhao , Li Jiang , Jun Fan , Haiyang Jiang , Fang Tao; J. Microbiol. 2018;56(5):356-364. Published online May 2, 2018; DOI: https://doi.org/10.1007/s12275-018-7349-3

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Abstract

Aspergillus flavus often invade many important corps and produce harmful aflatoxins both in preharvest and during storage stages. The regulation mechanism of aflatoxin biosynthesis in this fungus has not been well explored mainly due to the lack of an efficient transformation method for constructing a genome-wide gene mutant library. This challenge was resolved in this study, where a reliable and efficient Agrobacterium tumefaciens-mediated transformation (ATMT) protocol for A. flavus NRRL 3357 was established. The results showed that removal of multinucleate conidia, to collect a homogenous sample of uninucleate conidia for use as the transformation material, is the key step in this procedure. A. tumefaciens strain AGL-1 harboring the ble gene for zeocin resistance under the control of the gpdA promoter from A. nidulans is suitable for genetic transformation of this fungus. We successfully generated A. flavus transformants with an efficiency of ~ 60 positive transformants per 106 conidia using our protocol. A small-scale insertional mutant library (~ 1,000 mutants) was constructed using this method and the resulting several mutants lacked both production of conidia and aflatoxin biosynthesis capacity. Southern blotting analysis demonstrated that the majority of the transformants contained a single T-DNA insert on the genome. To the best of our knowledge, this is the first report of genetic transformation of A. flavus via ATMT and our protocol provides an effective tool for construction of genome-wide gene mutant libraries for functional analysis of important genes in A. flavus.

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Agrobacterium tumefaciens-mediated transformation for the genetic modification of the biotechnologically relevant fungus Aspergillus vadensis through synthetic biology
Carolina Ropero-Pérez, Paloma Manzanares, Jose F. Marcos, Sandra Garrigues
Current Research in Biotechnology.2024; 7: 100178. CrossRef
Development of Green Fluorescent Protein-Tagged Strains of Fusarium acuminatum via PEG-Mediated Genetic Transformation
Fangyi Ju, Zhongqiang Qi, Jiajin Tan, Tingting Dai
Microorganisms.2024; 12(12): 2427. CrossRef
An efficient targeted gene deletion approach for Cochliobolus heterostrophus using Agrobacterium tumefaciens-mediated transformation
Jiaying Sun, Rui Yang, Yujia Liu, Zengran Zhou, Jiaqi Jia, Hongming Huang, Shuqin Xiao, Chunsheng Xue
Journal of Microbiological Methods.2024; 216: 106863. CrossRef
Establishment of an Agrobacterium tumefaciens-Mediated Transformation System for Hirsutella sinensis
Lijuan Wu, Xinkun Hu, Shen Yan, Zenglin Wu, Xuzhong Tang, Lei Xie, Yujie Qiu, Rui Li, Ji Chen, Mengliang Tian
Current Issues in Molecular Biology.2024; 46(9): 10618. CrossRef
Role of Flavohemoglobins in the Development and Aflatoxin Biosynthesis of Aspergillus flavus
Xiaoling Zhou, Dongyue Chen, Min Yu, Yuan Jiao, Fang Tao
Journal of Fungi.2024; 10(6): 437. CrossRef
HacA, a key transcription factor for the unfolded protein response, is required for fungal development, aflatoxin biosynthesis and pathogenicity of Aspergillus flavus
Min Yu, Xiaoling Zhou, Dongyue Chen, Yuan Jiao, Guomin Han, Fang Tao
International Journal of Food Microbiology.2024; 417: 110693. CrossRef
Synthetic Biology Tools for Engineering Aspergillus oryzae
Hui Yang, Chaonan Song, Chengwei Liu, Pengchao Wang
Journal of Fungi.2024; 10(1): 34. CrossRef
Construction of Cordycepin High-Production Strain and Optimization of Culture Conditions
Hui Zhang, Ping Chen, Lin Xu, De Xu, Wendi Hu, Yong Cheng, Shengli Yang
Current Microbiology.2023;[Epub] CrossRef
Agrobacterium tumefaciens-mediated transformation of Nigrospora sp. isolated from switchgrass leaves and antagonistic toward plant pathogens
Summi Dutta, Gabriella Houdinet, Gitanjali NandaKafle, Arjun Kafle, Christine V. Hawkes, Kevin Garcia
Journal of Microbiological Methods.2023; 215: 106849. CrossRef
Systematic Characterization of bZIP Transcription Factors Required for Development and Aflatoxin Generation by High-Throughput Gene Knockout in Aspergillus flavus
Qianqian Zhao, Hao Pei, Xiaoling Zhou, Kai Zhao, Min Yu, Guomin Han, Jun Fan, Fang Tao
Journal of Fungi.2022; 8(4): 356. CrossRef
Homologous Expression and Characterization of α-L-rhamnosidase from Aspergillus niger for the Transformation of Flavonoids
Hangyu Ye, Xiaojun Li, Luyuan Li, Yinjun Zhang, Jianyong Zheng
Applied Biochemistry and Biotechnology.2022; 194(8): 3453. CrossRef
Genetic Manipulation and Transformation Methods for Aspergillus spp.
Ye-Eun Son, Hee-Soo Park
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Homologous overexpression of genes in Cordyceps militaris improves the production of polysaccharides
Yifeng Wang, Xi Yang, Ping Chen, Shengli Yang, Hui Zhang
Food Research International.2021; 147: 110452. CrossRef
A Novel Site-Specific Integration System for Genetic Modification of Aspergillus flavus
Fang Tao, Kai Zhao, Qianqian Zhao, Fangzhi Xiang, Guomin Han
G3 Genes|Genomes|Genetics.2020; 10(2): 605. CrossRef
Identification of antibiotics for use in selection of the chytrid fungi Batrachochytrium dendrobatidis and Batrachochytrium salamandrivorans
Kristyn A. Robinson, Mallory Dunn, Shane P. Hussey, Lillian K. Fritz-Laylin, Louise A. Rollins-Smith
PLOS ONE.2020; 15(10): e0240480. CrossRef
Aromatic Polyketides from a Symbiotic Strain Aspergillus fumigatus D and Characterization of Their Biosynthetic Gene D8.t287
Yi Hua, Rui Pan, Xuelian Bai, Bin Wei, Jianwei Chen, Hong Wang, Huawei Zhang
Marine Drugs.2020; 18(6): 324. CrossRef
An optimized Agrobacterium tumefaciens-mediated transformation system for random insertional mutagenesis in Fonsecaea monophora
Xing Xiao, Yu Li, JingLin Qin, Ya He, Wenying Cai, Zhiwen Chen, Liyan Xi, Junmin Zhang
Journal of Microbiological Methods.2020; 170: 105838. CrossRef
Genome-wide association study leads to novel genetic insights into resistance to Aspergillus flavus in maize kernels
Guomin Han, Cuiping Li, Fangzhi Xiang, Qianqian Zhao, Yang Zhao, Ronghao Cai, Beijiu Cheng, Xuewen Wang, Fang Tao
BMC Plant Biology.2020;[Epub] CrossRef
The Efficacy of Composite Essential Oils against Aflatoxigenic Fungus Aspergillus flavus in Maize
Fangzhi Xiang, Qianqian Zhao, Kai Zhao, Hao Pei, Fang Tao
Toxins.2020; 12(9): 562. CrossRef
Ethylene and Benzaldehyde Emitted from Postharvest Tomatoes Inhibit Botrytis cinerea via Binding to G-Protein Coupled Receptors and Transmitting with cAMP-Signal Pathway of the Fungus
Yongwen Lin, Hongchun Ruan, Komivi Senyo Akutse, Baochun Lai, Yizhang Lin, Youming Hou, Fenglin Zhong
Journal of Agricultural and Food Chemistry.2019; 67(49): 13706. CrossRef

Long-term organic-inorganic fertilization ensures great soil productivity and bacterial diversity after natural-to-agricultural ecosystem conversion: Weibing Xun , Zhihui Xu , Wei Li , Yi Ren , Ting Huang , Wei Ran , Boren Wang , Qirong Shen , Ruifu Zhang; J. Microbiol. 2016;54(9):611-617. Published online August 31, 2016; DOI: https://doi.org/10.1007/s12275-016-6143-3

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Abstract

Natural ecosystems comprise the planet’s wild plant and animal resources, but large tracts of land have been converted to agroecosystems to support the demand for agricultural products. This conversion limits the number of plant species and decreases the soil biological diversity. Here we used highthroughput 16S rRNA gene sequencing to evaluate the responses of soil bacterial communities in long-term converted and fertilized red soils (a type of Ferralic Cambisol). We observed that soil bacterial diversity was strongly affected by different types of fertilization management. Oligotrophic bacterial taxa demonstrated large relative abundances in chemically fertilized soil, whereas copiotrophic bacterial taxa were found in large relative abundances in organically fertilized and fallow management soils. Only organic-inorganic fertilization exhibited the same local taxonomic and phylogenetic diversity as that of a natural ecosystem. However, the independent use of organic or inorganic fertilizer reduced local taxonomic and phylogenetic diversity and caused biotic homogenization. This study demonstrated that the homogenization of bacterial communities caused by natural-to-agricultural ecosystem conversion can be mitigated by employing rational organic-inorganic fertilization managemen

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Fertilization- and Irrigation-Modified Bacterial Community Composition and Stimulated Enzyme Activity of Eucalyptus Plantations Soil
Chunyu Huo, Jianhui Mao, Jianlang Zhang, Xinzhu Yang, Shangkun Gao, Jiyue Li, Qian He, Guangda Tang, Xianan Xie, Zujing Chen
International Journal of Molecular Sciences.2024; 25(3): 1385. CrossRef
Exploring the effects of different fertilizer application durations on the functional microbial profiles of soil carbon and nitrogen cycling by using metagenomics in Paulownia plantations in a subtropical zone
Sen Liu, Xia Li, Yujia Fu, Peng Li, Jie Qiao, Hui Li, Lichao Wu, Baoping Wang, Sheng Lu
European Journal of Forest Research.2024; 143(3): 955. CrossRef
Comprehensive agricultural ecological effects of aeration on regenerated liquid fertilizer of mini flush toilet
Shangyi Shu, Yunpeng Shi, Zixiao Wang, Yubing Zhao, Bin Fan
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Biotic homogenisation and differentiation as directional change in beta diversity: synthesising driver–response relationships to develop conceptual models across ecosystems
Robert J. Rolls, David C. Deane, Sarah E. Johnson, Jani Heino, Marti J. Anderson, Kari E. Ellingsen
Biological Reviews.2023; 98(4): 1388. CrossRef
Conversion of steppe to cropland increases spatial heterogeneity of soil functional genes
Junjie Liu, Yaping Guo, Haidong Gu, Zhuxiu Liu, Xiaojing Hu, Zhenhua Yu, Yansheng Li, Lujun Li, Yueyu Sui, Jian Jin, Xiaobing Liu, Jonathan M Adams, Guanghua Wang
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Autotoxins in continuous tobacco cropping soils and their management
Yudong Chen, Long Yang, Lumin Zhang, Jianrong Li, Yalin Zheng, Wenwu Yang, Lele Deng, Qian Gao, Qili Mi, Xuemei Li, Wanli Zeng, Xinhua Ding, Haiying Xiang
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What role does organic fertilizer actually play in the fate of antibiotic resistome and pathogenic bacteria in planting soil?
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Impact of long-term application of manure and inorganic fertilizers on common soil bacteria in different soil types
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Effects of planting structure on soil water-stable aggregates, microbial biomass and enzyme activity in a catchment of Loess Plateau terraces, China
Li Xiao, Yimei Huang, Junfeng Zhao, Junying Zhou, Fakher Abbas
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Hang Wang, Xiang He, Zhongfu Zhang, Minggang Li, Qing Zhang, Hongye Zhu, Shengtao Xu, Peiwen Yang
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Characterization of Cultivated Fungi Isolated from Grape Marc Wastes Through the Use of Amplified rDNA Restriction Analysis and Sequencing: Spyridon Ntougias , Nektarios Kavroulakis , Kalliope K. Papadopoulou , Constantinos Ehaliotis , Georgios I. Zervakis; J. Microbiol. 2010;48(3):297-306. Published online June 23, 2010; DOI: https://doi.org/10.1007/s12275-010-9193-y

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Abstract: Microbial assessment of grape marc wastes, the residual solid by-product of the wine-industry, was performed by identifying phylogenetically the fungal culturable diversity in order to evaluate environmental and disposal safety issues and to discuss ecological considerations of applications on agricultural land. Fungal spores in grape marc were estimated to 4.7×106 per g dry weight. Fifty six fungal isolates were classified into eight operational taxonomic units (OTUs) following amplified ribosomal DNA restriction analysis (ARDRA) and colony morphology. Based on 18S rRNA gene and 5.8S rRNA gene-ITS sequencing, the isolates representing OTUs #1, #2, #3, and #4, which comprised 44.6%, 26.8%, 12.5%, and 5.3%, respectively, of the number of the total isolates, were identified as Aspergillus fumigatus, Bionectria ochroleuca, Haematonectria haematococca, and Trichosporon mycotoxinivorans. The isolates of OTU#5 demonstrated high phylogenetic affinity with Penicillium spp., while members of OTUs #6 and #7 were closer linked with Geotrichum candidum var. citri-aurantii and Mycocladus corymbifer, respectively (95.4 and 97.9% similarities in respect to their 5.8S rRNA gene-ITS sequences). The OTU#8 with a single isolate was related with Aspergillus strains. It appears that most of the fungal isolates are associated with the initial raw material. Despite the fact that some of the species identified may potentially act as pathogens, measures such as the avoidance of maintaining large and unprocessed quantities of grape marc wastes in premises without adequate aeration, together with its suitable biological treatment (e.g., composting) prior to any agriculture-related application, could eliminate any pertinent health risks.

Research Support, Non-U.S. Gov'ts

Panacagrimonas perspica gen. nov., sp. nov., a Novel Member of Gammaproteobacteria Isolated from Soil of a Ginseng Field: Wan-Taek Im , Qing-Mei Liu , Jung-Eun Yang , Min-Seok Kim , Se-Young Kim , Sung-Taik Lee , Tae-Hoo Yi; J. Microbiol. 2010;48(2):262-266. Published online May 1, 2010; DOI: https://doi.org/10.1007/s12275-010-0067-0

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Abstract: A taxonomic study was carried out on Gsoil 142T, a bacterial strain isolated from the soil collected in a ginseng field in Pocheon province, South Korea. Comparative 16S rRNA gene sequence studies showed a clear affiliation of this bacterium to the Gammaproteobacteria, and it was most closely related to Hydrocarboniphaga effusa ATCC BAA 332T (94.4%, 16S rRNA gene sequence similarity), Nevskia ramosa DSM 11499T (94.1%) and Alkanibacter difficilis MN154.3T (92.0%). Strain Gsoil 142T was a Gram-negative, strictly aerobic, motile, and rod-shaped bacterium. The G+C content of the genomic DNA was 69.9% and predominant ubiquinone was Q-8. Major fatty acids were summed feature 8 (C18:1 w7c and/or w6c, 36.3%), summed feature 3 (iso-C15:0 2-OH and/or C16:1 w7c, 20.6%) and C16:0 (17.4%). The major polar lipids detected in strain Gsoil 142T were phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and an unknown glycolipid. On the basis of polyphasic evidence, it is proposed that strain Gsoil 142T should be placed in a novel genus and species, for which the name Panacagrimonas perspica gen. nov., sp. nov. is proposed. The type strain is Gsoil 142T (=KCTC 12982T =LMG 23239T).

Purification and Biochemical Properties of a Glucose-Stimulated β-D-Glucosidase Produced by Humicola grisea var. thermoidea Grown on Sugarcane Bagasse: Cesar Vanderlei Nascimento , Flávio Henrique Moreira Souza , Douglas Chodi Masui , Francisco Assis Leone , Rosane Marina Peralta , João Atílio Jorge , Rosa Prazeres Melo Furriel; J. Microbiol. 2010;48(1):53-62. Published online March 11, 2010; DOI: https://doi.org/10.1007/s12275-009-0159-x

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Abstract: The effect of several carbon sources on the production of mycelial-bound β-glucosidase by Humicola grisea var. thermoidea in submerged fermentation was investigated. Maximum production occurred when cellulose was present in the culture medium, but higher specific activities were achieved with cellobiose or sugarcane bagasse. Xylose or glucose (1%) in the reaction medium stimulated β-glucosidase activity by about 2-fold in crude extracts from mycelia grown in sugarcane bagasse. The enzyme was purified by ammonium sulfate precipitation, followed by Sephadex G-200 and DEAE-cellulose chromatography, showing a single band in PAGE and SDS-PAGE. The β-glucosidase had a carbohydrate content of 43% and showed apparent molecular masses of 57 and 60 kDa, as estimated by SDS-PAGE and gel filtration, respectively. The optimal pH and temperature were 6.0 and 50°C, respectively. The purified enzyme was thermostable up to 60 min in water at 55°C and showed half-lives of 7 and 14 min when incubated in the absence or presence of 50 mM glucose, respectively, at 60°C. The enzyme hydrolyzed p-nitrophenyl-β-D-glucopyranoside, p-nitrophenyl-β-galactopyranoside, p-nitrophenyl-β-D-fucopyranoside, p-nitrophenyl-β-D-xylopyranoside, o-nitrophenyl-β-Dgalactopyranoside, lactose, and cellobiose. The best synthetic and natural substrates were p-nitrophenyl-β-Dfucopyranoside and cellobiose, respectively. Purified enzyme activity was stimulated up to 2-fold by glucose or xylose at concentrations from 25 to 200 mM. The addition of purified or crude β-glucosidase to a reaction medium containing Trichoderma reesei cellulases increased the saccharification of sugarcane bagasse by about 50%. These findings suggest that H. grisea var. thermoidea β-glucosidase has a potential for biotechnological applications in the bioconversion of lignocellulosic materials.

Characterization of Plant-Growth Promoting Diazotrophic Bacteria Isolated from Field Grown Chinese Cabbage under Different Fertilization Conditions: Woo-Jong Yim , Selvaraj Poonguzhali , Munusamy Madhaiyan , Pitchai Palaniappan , M. A. Siddikee , Tongmin Sa; J. Microbiol. 2009;47(2):147-155. Published online May 2, 2009; DOI: https://doi.org/10.1007/s12275-008-0201-4

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Abstract: Diazotrophic bacteria isolated from the rhizosphere of Chinese cabbage were assessed for other plant growth promoting characteristics viz., production of IAA, ethylene, ACC deaminase, phosphate solubilization, and gnotobiotic root elongation. Their effect on inoculation to Chinese cabbage was also observed under growth chamber conditions. A total of 19 strains that showed higher nitrogenase activity identified by 16S rRNA gene sequence analysis were found to be the members of the genera Pseudomonas and Agrobacterium belonging to α- and γ-Proteobacteria groups. These strains were also efficient in producing IAA and ACC deaminase though they produced low levels of ethylene and no phosphate solubilization. In addition, inoculation of selected diazotrophic bacterial strains significantly increased seedling length, dry weight, and total nitrogen when compared to uninoculated control. The colonization of crop plants by diazotrophic bacteria can be affected by many biotic and abiotic factors, and further studies are oriented towards investigating the factors that could influence the establishment of a selected bacterial community.

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