Journal of Microbiology

Journal Articles

Gut Microbiota Dysbiosis Facilitates Susceptibility to Bloodstream Infection: Xiaomin Lin, Chun Lin, Xin Li, Fen Yao, Xiaoling Guo, Meimei Wang, Mi Zeng, Yumeng Yuan, Qingdong Xie, Xudong Huang, Xiaoyang Jiao; J. Microbiol. 2024;62(12):1113-1124. Published online December 2, 2024; DOI: https://doi.org/10.1007/s12275-024-00190-5

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Abstract: To study the role of intestinal flora in the development of bloodstream infections (BSIs). 42 patients and 19 healthy controls (HCs) were screened into the study and their intestinal flora was measured by 16S rRNA gene sequencing. The bacterial diversity was significantly lower in the BSI group compared with that in the HCs (P < 0.001), and beta diversity was significantly differentiated between the two groups (PERMANOVA, P = 0.001). The four keystone species [Roseburia, Faecalibacterium, Prevotella, and Enterococcus (LDA > 4)] differed significantly between the two groups. Dysbiosis of fecal microbial ecology is a common condition present in patients with BSI. The proliferation of certain pathogens or reduction of SCFA-producing bacteria would cause susceptibility to BSI.

Leifsonia flava sp. nov., a novel actinobacterium isolated from the rhizosphere of Aquilegia viridiflora: Ying Cai , Wen-Zhen Tao , Yu-Jun Ma , Juan Cheng , Meng-Yue Zhang , Yi-Xuan Zhang; J. Microbiol. 2018;56(8):549-555. Published online July 25, 2018; DOI: https://doi.org/10.1007/s12275-018-8061-z

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SYP-B2174T is a yellow-pigmented, Gram-positive, non-motile, and rod-shaped actinobacterium isolated from the rhizospheric soil of Aquilegia viridiflora Pall. collected from the Xinjiang uygur autonomous region of China. The strain’s growth temperature ranges from 1 to 35°C, with an optimal growth being observed at 28°C. Growth occurs from 0 to 5% NaCl and at pH 6–8, with optimal growth being observed in 1% NaCl at pH 7. Comparative 16S rRNA gene sequencebased phylogenetic analysis placed the strain in a clade with the species Leifsonia kafniensis JCM 17021T and Leifsonia psychrotolerans DSM 22824T with similarities of 97.8 and 97.6%, respectively. The DNA-DNA hybridization values of the strain SYP-B2174T to its closest phylogenetic neighbors were significantly lower than 35.7%. The strain was identified as a novel species of the genus Leifsonia judging by the coryneform morphology, peptidoglycans based upon 2,4-diaminobutyric acid, principal phospholipids phosphatidylglycerol and diphosphatidylglycerol, major menaquinone MK-11, predominant fatty acids of anteiso-C15:0, anteiso-C17:0, and iso-C16:0, and a DNA G + C base composition of 68.7 mol%, for which the name Leifsonia flava sp. nov. is proposed. The type strain is SYP-B2174T (= CGMCC 1.15856T = DSM 105144T = KCTC 39963T).

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Enhancement of the germination and growth of Panicum miliaceum and Brassica juncea in Cd- and Zn-contaminated soil inoculated with heavy-metal-tolerant Leifsonia sp. ZP3
Ian Cho, Soo Yeon Lee, Kyung-Suk Cho
World Journal of Microbiology and Biotechnology.2024;[Epub] CrossRef
Plant Growth-Promoting and Tequila Vinasse-Resistant Bacterial Strains
Alberto J. Valencia-Botín, Ismael F. Chávez-Díaz, Florentina Zurita-Martínez, Allan Tejeda-Ortega, Lily X. Zelaya-Molina
Microbiology Research.2024; 15(3): 1144. CrossRef
Phylogenomics, phenotypic, and functional traits of five novel (Earth-derived) bacterial species isolated from the International Space Station and their prevalence in metagenomes
Anna C. Simpson, Pratyay Sengupta, Flora Zhang, Asif Hameed, Ceth W. Parker, Nitin K. Singh, Georgios Miliotis, Punchappady D. Rekha, Karthik Raman, Christopher E. Mason, Kasthuri Venkateswaran
Scientific Reports.2023;[Epub] CrossRef
Diversity of Culturable Bacteria Isolated from Highland Barley Cultivation Soil in Qamdo, Tibet Autonomous Region
HU PAN, JIE ZHOU, ZHUOMA DAWA, YANNA DAI, YIFAN ZHANG, HUI YANG, CHONG WANG, HUHU LIU, HUI ZHOU, XIANGYANG LU, YUN TIAN
Polish Journal of Microbiology.2021; 70(1): 87. CrossRef
Unlocking the potential of plant growth-promoting rhizobacteria on soil health and the sustainability of agricultural systems
Zobia Khatoon, Suiliang Huang, Mazhar Rafique, Ali Fakhar, Muhammad Aqeel Kamran, Gustavo Santoyo
Journal of Environmental Management.2020; 273: 111118. CrossRef
Notification of changes in taxonomic opinion previously published outside the IJSEM
Aharon Oren, George M. Garrity
International Journal of Systematic and Evolutionary Microbiology.2019; 69(1): 13. CrossRef

Temporal and spatial impact of Spartina alterniflora invasion on methanogens community in Chongming Island, China: Xue Ping Chen , Jing Sun , Yi Wang , Heng Yang Zhang , Chi Quan He , Xiao Yan Liu , Nai Shun Bu , Xi-En Long; J. Microbiol. 2018;56(7):507-515. Published online June 14, 2018; DOI: https://doi.org/10.1007/s12275-018-8062-y

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Abstract

Methane production by methanogens in wetland is recognized as a significant contributor to global warming. Spartina alterniflora (S. alterniflora), which is an invasion plant in China’s wetland, was reported to have enormous effects on methane production. But studies on shifts in the methanogen community in response to S. alterniflora invasion at temporal and spatial scales in the initial invasion years are rare. Sediments derived from the invasive species S. alterniflora and the native species Phragmites australis (P. australis) in pairwise sites and an invasion chronosequence patch (4 years) were analyzed to investigate the abundance and community structure of methanogens using quantitative real-time PCR (qPCR) and Denaturing gradient gel electrophoresis (DGGE) cloning of the methyl-coenzyme M reductase A (mcrA) gene. For the pairwise sites, the abundance of methanogens in S. alterniflora soils was lower than that of P. australis soils. For the chronosequence patch, the abundance and diversity of methanogens was highest in the soil subjected to two years invasion, in which we detected some rare groups including Methanocellales and Methanococcales. These results indicated a priming effect at the initial invasion stages of S. alterniflora for microorganisms in the soil, which was also supported by the diverse root exudates. The shifts of methanogen communities after S. alterniflora invasion were due to changes in pH, salinity and sulfate. The results indicate that root exudates from S. alterniflora have a priming effect on methanogens in the initial years after invasion, and the predominate methylotrophic groups (Methanosarcinales) may adapt to the availability of diverse substrates and reflects the potential for high methane production after invasion by S. alterniflora.

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Stronger increase of methane emissions from coastal wetlands by non‐native Spartina alterniflora than non‐native Phragmites australis
Andrea Fuchs, Ian C. Davidson, J. Patrick Megonigal, John L. Devaney, Christina Simkanin, Genevieve L. Noyce, Meng Lu, Grace M. Cott
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Predictions of Spartina alterniflora leaf functional traits based on hyperspectral data and machine learning models
Wei Li, Xueyan Zuo, Zhijun Liu, Leichao Nie, Huazhe Li, Junjie Wang, Zhiguo Dou, Yang Cai, Xiajie Zhai, Lijuan Cui
European Journal of Remote Sensing.2024;[Epub] CrossRef
Salt marsh soil organic carbon is regulated by drivers of microbial activity
Hailey Erb, Ashley Keiser, Kristen M DeAngelis
Sustainable Microbiology.2024;[Epub] CrossRef
Asymmetric responses of functional microbes in methane and nitrous oxide emissions to plant invasion: A meta-analysis
Yanzhong Yao, Youtao Song, Pinjie Su, Jing Wang, Congke Miao, Yifu Luo, Qiqi Sun, Jiale Wang, Guohui Zhang, Naishun Bu, Zhaolei Li
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Increasing coastal reclamation by Invasive alien plants and coastal armoring threatens the ecological sustainability of coastal wetlands
Jian Li, Zhanrui Leng, Taitiya Kenneth Yuguda, Lili Wei, Jiaojiao Xia, Chongyu Zhuo, Ziying Nie, Daolin Du
Frontiers in Marine Science.2023;[Epub] CrossRef
Spartina alterniflora Invaded Coastal Wetlands by Raising Soil Sulfur Contents: A Meta-Analysis
Zhenzhen Zhao, Liyu Cheng, Chiquan He, Feifei Wang, Jialin Liu, Yuanhang Li, Xueping Chen, Xiaoyan Liu, Gaoming Lv, Daoyuan Wang
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Exogenous nitrogen from riverine exports promotes soil methane production in saltmarshes in China
Chenhao Zhou, Yan Zhang, Songshuo Li, Qiuyue Jiang, Hongyang Chen, Ting Zhu, Xiao Xu, Hao Liu, Shiyun Qiu, Jihua Wu, Ming Nie, Bo Li
Science of The Total Environment.2022; 838: 156203. CrossRef
Exogenous Nitrogen from Riverine Exports Promotes Soil Methane Production in Saltmarshes in China
Chenhao Zhou, Yan Zhang, Songshuo Li, Qiuyue Jiang, Hongyang Chen, Ting Zhu, Xiao Xu, Hao Liu, Shi-Yun Qiu, Jihua Wu, Ming Nie, Bo Li
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Spartina alterniflora raised soil sulfide content by regulating sulfur cycle-associated bacteria in the Jiuduansha Wetland of China
Chiquan He, Liyu Cheng, Daoyuan Wang, Zhenzhen Zhao, Zhengyu Wang, Feifei Wang, Xiaoxi Wang, Pu Zhang, Xueping Chen, Xiaoyan Liu
Plant and Soil.2021; 469(1-2): 107. CrossRef
The linkage between methane production activity and prokaryotic community structure in the soil within a shale gas field in China
Yan-Qin Wang, Guang-Quan Xiao, Yong-Yi Cheng, Ming-Xia Wang, Bo-Ya Sun, Zhi-Feng Zhou
Environmental Science and Pollution Research.2020; 27(7): 7453. CrossRef

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

Lactobacillus rhamnosus CCFM1107 treatment ameliorates alcohol-induced liver injury in a mouse model of chronic alcohol feeding: Fengwei Tian , Feifei Chi , Gang Wang , Xiaoming Liu , Qiuxiang Zhang , Yongquan Chen , Hao Zhang , Wei Chen; J. Microbiol. 2015;53(12):856-863. Published online December 2, 2015; DOI: https://doi.org/10.1007/s12275-015-5239-5

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Abstract

Lactobacillus rhamnosus CCFM1107 was screened for high antioxidative activity from 55 lactobacilli. The present study attempted to explore the protective properties of L. rhamnosus CCFM1107 in alcoholic liver injury. A mouse model was induced by orally feeding alcohol when simultaneously treated with L. rhamnosus CCFM1107, the drug Hu-Gan- Pian (HGP), L. rhamnosus GG (LGG), and L. plantarum CCFM1112 for 3 months. Biochemical analysis was performed for both serum and liver homogenate. Detailed intestinal flora and histological analyses were also carried out. Our results indicated that the administration of L. rhamnosus CCFM1107 significantly inhibited the increase in the levels of serum aminotransferase and endotoxin, as well as the levels of triglyceride (TG) and cholesterol (CHO) in the serum and in the liver. Glutathione (GSH), glutathione peroxidase (GSH-Px) and superoxide dismutase (SOD) were elevated while the levels of malondialdehyde (MDA) were decreased. The enteric dysbiosis caused by alcohol was restored by increasing the numbers of both lactobacilli and bifidobacteria and decreasing the numbers of both enterococci and enterobacter. Histological analysis confirmed the protective effect of L. rhamnosus CCFM1107. Compared with the other lactobacilli and to the drug Hu-Gan-Pian, there is a high chance that L. rhamnosus CCFM1107 provides protective effects on alcoholic liver injury by reducing oxidative stress and restoring the intestinal flora.

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Communities of ammonia oxidizers at different stages of Spartina alterniflora invasion in salt marshes of Yangtze River estuary: Fei Xia , Jemaneh Zeleke , Qiang Sheng , Ji-Hua Wu , Zhe-Xue Quan; J. Microbiol. 2015;53(5):311-320. Published online May 3, 2015; DOI: https://doi.org/10.1007/s12275-015-4660-0

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Abstract

Spartina alterniflora, an aggressive invasive plant species at the estuarine wetlands of China’s coasts, has become a major threat to the natural ecosystems. To understand its potential influence on nitrification processes, the community structures and abundance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) were investigated using 454-pyrosequencing and quantitative real-time PCR (qPCR) in S. alterniflora invading salt marsh sediments at the Yangtze River estuary in Chongming island, Shanghai, China. Copy numbers of archaeal and bacterial ammonia monooxygenase subunit A (amoA) genes did not show accordant shifts with S. alterniflora invasion in the two sampling sites. However, the copy numbers of archaeal amoA gene were higher in summer than in spring. Phylogenetic analysis indicated that more than 90% of the archaeal and 92% of the bacterial amoA gene sequences were closely related to marine group I.1a and the clusters 13 and 15 in Nitrosospira lineage, respectively. The effect of different seasons (spring and summer) was important for the abundance variation of AOA, while different stages of S. alterniflora invasion did not show significant effect for both AOA and AOB. Variation of AOA community was significantly related to total carbon (TC) and sulfate concentration (P < 0.05), whereas the AOB community was significantly related to sulfate concentration, total nitrogen (TN), TC and pH (P < 0.05). In conclusion, the abundance and diversity of ammonia oxidizing microbial communities were not strongly affected by S. alterniflora invasion.

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Chengzhi Yuan, Jia Gao, Luping Huang, Shuguang Jian
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Mycoflora Dynamics Analysis of Korean Traditional Wheat-based Nuruk: Jyotiranjan Bal , Suk-Hyun Yun , Ha-Yeon Song , Soo-Hwan Yeo , Jae Hyun Kim , Jung-Mi Kim , Dae-Hyuk Kim; J. Microbiol. 2014;52(12):1025-1029. Published online November 29, 2014; DOI: https://doi.org/10.1007/s12275-014-4620-0

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Abstract

The growing popularity of traditional Korean alcoholic beverages has led to a demand for quality enhancement of the traditional starter culture nuruk, which consists primarily of wheat. Therefore, this study focused on mycoflora characterization and the temporal variations in traditional wheatbased nuruks fermented at two representative traditional temperature conditions for 30 days. Nuruk A was fermented at a constant temperature of 36°C for 30 days and nuruk B was fermented at a high initial temperature of 45°C for 10 days followed by 35°C for 20 days. The average mycoflora load in the two different nuruk conditions did not vary significantly between the 0 and 30 day cultures, and a maximum load of 8.39 log CFU/g was observed for nuruk A on culture day 3 and 7.87 log CFU/g for nuruk B on culture day 30. Within two samples, pH was negatively correlated with temporal changes in mycoflora load. The pH of nuruk A was significantly lower than that of nuruk B at all of the time points evaluated. Culture- dependent characterization led to the identification of 55 fungal isolates belonging to 9 genera and 15 species, with the most prominent genera comprising Lichtheimia, Penicillium, Trametes, Aspergillus, Rhizomucor, and Mucor. A total of 25 yeast isolates were characterized belonging to 6 genera and 7 species, the most prominent among which were Rhodotorula, Pichia, Debaryomyces, Saccharomycopsis, and Torulospora. Mycofloral community dynamics analysis revealed that both samples A and B varied considerably with respect to the fungal communities over a span of 30 days.

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Abstract

Lactobacillus paracasei subsp. paracasei LC01 (LC01) can tolerate intestinal stresses and has antioxidant activity. To evaluate the effect of the bacterium on human intestinal microflora, a randomized, double-blind, placebo-controlled human trial was carried out. Fifty-two healthy adult volunteers were randomized equally to two groups. One group consumed 12% (wt/vol) skimmed milk supplemented with 1010 CFU of LC01 each day for the 4-week treatment period, and then consumed placebo in the next treatment period, separated by a 2-week washout. The other group followed the reverse order. Group-specific real-time PCR and biochemical analyses was used to determine the intestinal bacterial composition of fecal samples collected at the end of every period, and the concentration of short-chain fatty acids and ammonia. A significant inhibition in fecal Escherichia coli and increase in Lactobacillus, Bifidobacterium, and Roseburia intestinalis were observed after consumption of LC01. Acetic acid and butyric acid were significantly higher in the probiotic stage and fecal ammonia was significantly lower. The results indicated a modulation effect of LC01 on the intestinal microflora of young adults, suggesting a beneficial effect on bowel health. LC01 may have potential value as a probiotic.

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Abstract: A metagenomic fosmid library was constructed using genomic DNA isolated from abalone intestine. Screening of a library of 3,840 clones revealed a 36 kb insert of a cellulase positive clone (pAM11E10). A shotgun clone library was constructed using the positive clone (pAM11E10) and further screening of 3,840 shotgun clones with an approximately 5 kb insert size using a Congo red overlay revealed only one cellulase positive clone (pAM11L9). The pAM11L9 consisted of a 5,293-bp DNA sequence and three open reading frames (ORFs). Among the three ORFs, cellulase activity was only shown in the recombinant protein (CelAM11) coded by ORF3, which showed 100% identity with outer membrane protein A from Vibrio alginolyticus 12G01, but no significant sequence homology to known cellulases. The expressed protein (CelAM11) has a molecular weight of approximately 37 kDa and the highest CMC hydrolysis activity was observed at pH 7.0 and 37°C. The carboxymethyl cellulase activity was determined by zymogram active staining and different degraded product profiles for CelAM11 were obtained when cellotetraose and cellopentaose were used as the substrates, while no substrate hydrolysis was observed on oligosaccharides such as cellobiose and cellotriose.

Pseudoxanthomonas icgebensis sp. nov., Isolated from the Midgut of Anopheles stephensi Field-Collected Larvae§: Asha Rani , Anil Sharma , Tridibes Adak , Raj K. Bhatnagar; J. Microbiol. 2010;48(5):601-606. Published online November 3, 2010; DOI: https://doi.org/10.1007/s12275-010-0125-7

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Abstract: A Gram-negative, aerobic, golden yellow, rod-shaped bacterium, a strain designated ICGEB-L15T, was isolated from the larval midgut of Anopheles stephensi captured in District Jhajjar, Haryana, India. The strain ICGEB-L15T grows at 30-50°C (optimum 30-37°C), pH 6.5-8.5 (optimum 7.0-8.0) and in the presence of 2% NaCl. The major fatty acids were iso-C15:0 (22.5% of total fatty acid), anteiso-C15:0 (16.5%), iso-C17:1ω9c (10.3%), iso-C16:0 (7.3%), C16:0 (6.1%), and iso-C11:0 (5.3%). The strain showed the highest 16S rRNA gene sequence similarities with the type strains Pseudoxanthomonas daejeonensis KCTC 12207T (97.4%), Pseudoxanthomonas kaohsiungensis J36T (97.17%), and Pseudoxanthomonas mexicana AMX 26BT (97.11%). The DNA relatedness between ICGEB-L15T and Pseudoxanthomonas daejeonensis KCTC 12207T, Pseudoxanthomonas kaohsiungensis J36T and Pseudoxanthomonas mexicana AMX 26BT was 24.5%, 28.2%, and 33.6%, respectively. The G+C content of genomic DNA was 69.9 mol%. The major isoprenoid quinone of strain ICGEB-L15T was Q-8. The strain ICGEB-L15T represents a novel species of the genus Pseudoxanthomonas based on physiological, biochemical and phylogenetic properties; therefore, the name Pseudoxanthomonas icgebensis sp. nov. is proposed. The type strain is ICGEB-L15T (=KACC 14090T =DSM 22536T).

Lichen Flora around the Korean Antarctic Scientific Station, King George Island, Antarctic: Ji Hee Kim , In-Young Ahn , Soon Gyu Hong , Mikhail Andreev , Kwang-Mi Lim , Mi Jin Oh , Young Jin Koh , Jae-Seoun Hur; J. Microbiol. 2006;44(5):480-491.; DOI: https://doi.org/2450 [pii]

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Abstract: As part of the long-term monitoring projects on Antarctic terrestrial vegetation in relation to global climate change, a lichen floristical survey was conducted around the Korean Antarctic Station (King Sejong Station), which is located on Barton Peninsula, King George Island, in January and February of 2006. Two hundred and twenty-five lichen specimens were collected and sixty-two lichen species in 38 genera were identified by morphological characteristics, chemical constituents, TLC analysis and ITS nucleotide sequence analysis.

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