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Dinango VN, Dhouib H, Wakam LN, Kouokap LK, Youmbi DY, Eke P, Driss F, Tounsi S, Boyom FF, Frikha-Gargouri O. Bacterial endophytes inhabiting desert plants provide protection against seed rot caused by Fusarium verticillioides and promote growth in maize. PEST MANAGEMENT SCIENCE 2024; 80:1206-1218. [PMID: 37886813 DOI: 10.1002/ps.7850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 10/05/2023] [Accepted: 10/21/2023] [Indexed: 10/28/2023]
Abstract
BACKGROUND Fusarium maize ear and root rot disease caused by Fusarium verticillioides has become one of the most serious fungal diseases associated with maize production. Due to their abilities to promote plant development and manage diseases, bacterial endophytes provide a more promising approach for treating this vascular disease. RESULTS This work was undertaken for the selection and identification of promising isolates as plant growth promoters and biocontrol agents against F. verticillioides in maize agroecosystems. A screening procedure consisting of in vitro and in situ tests was applied to 27 endophytic strains originating from desert plants: Euphorbia antiquorum, Calotropis procera, and Alcasia albida. In vitro studies indicated that the bacteria exhibited variable results in biocontrol, endophytism, and plant growth-promoting traits. In addition, in situ plant growth promotion and biocontrol experiments allowed the identification of the most promising bacterial endophytes. In vitro and in situ comparative study results indicated a low correlation. Our data revealed that in situ screening must be used as the method of selection of biocontrol agents against Fusarium ear and root rot disease. Based on in situ results, seven potent strains were selected and identified as Bacillus subtilis, Bacillus velezensis, Bacillus tequilensis, Stenotrophomonas maltophilia, and Klebsiella pneumoniae. CONCLUSION The results of this study showed that the selected strains seem to be promising candidates to be exploited as biofertilizers and biocontrol agents against Fusarium maize ear and root rot disease. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Vanessa Nya Dinango
- Antimicrobial & Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Hanen Dhouib
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, Sfax, Tunisia
| | - Louise Nana Wakam
- Antimicrobial & Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
- Soil Microbiology Laboratory, Biotechnology Centre, Yaoundé, Cameroon
| | - Lanvin Kepngop Kouokap
- Antimicrobial & Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Diane Yimta Youmbi
- Antimicrobial & Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Pierre Eke
- College of Technology, Department of Crop Production Technology, University of Bamenda, Bambili, Cameroon
| | - Fatma Driss
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, Sfax, Tunisia
| | - Slim Tounsi
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, Sfax, Tunisia
| | - Fabrice Fekam Boyom
- Antimicrobial & Biocontrol Agents Unit (AmBcAU), Laboratory for Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, University of Yaoundé I, Yaoundé, Cameroon
| | - Olfa Frikha-Gargouri
- Laboratory of Biopesticides, Centre of Biotechnology of Sfax, Sfax University, Sfax, Tunisia
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Kutsuna R, Miyoshi-Akiyama T, Muramatsu Y, Hamada M, Tomida J, Kikuchi K, Kawamura Y. Siderophore-producing Pantoea ferrattrahens sp. nov. isolated from a clinical specimen and Pantoea ferramans sp. nov. isolated from soil at the bottom of a pond. Microbiol Immunol 2023; 67:480-489. [PMID: 37740512 DOI: 10.1111/1348-0421.13097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 08/22/2023] [Accepted: 09/03/2023] [Indexed: 09/24/2023]
Abstract
Two Gram-negative facultative anaerobes were isolated from a sepsis patient with pancreatic cancer (strain PAGU 2156T ) and soil at the bottom of a pond (strain PAGU 2198T ), respectively. These two strains formed haloes around the colonies on chrome azurol S agar plates, indicating the production of siderophores. Two isolates assigned to the genus Pantoea based on the 16S rRNA gene were differentiated from established species by using polymorphic taxonomies. Phylogenetic analysis using four housekeeping genes (gyrB, rpoB, atpD, and infB) showed that strain PAGU 2156T is closely related to Pantoea cypripedii LMG 2657T (89.9%) or Pantoea septica LMG 5345T (95.7%). Meanwhile, strain PAGU 2198T formed a single clade with Pantoea rodasii DSM 26611T (93.6%) and Pantoea rwandensis DSM 105076T (93.3%). The average nucleotide identity values obtained from the draft genome assembly showed ≤90.2% between strain PAGU 2156T and closely related species and ≤81.5% between strain PAGU 2198T and closely related species. Based on various phenotypes, biochemical properties, and whole-cell fatty acid composition compared with related species, it was concluded that each strain should be classified as a new species of the genus Pantoea. In this manuscript, Pantoea ferrattrahens sp. nov. and Pantoea ferramans sp. nov. with strain PAGU 2156T (=NBRC 115930T = CCUG 76757T ) and strain PAGU 2198T (=NBRC 114265T = CCUG 75151T ) are proposed as each type strain.
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Affiliation(s)
- Ryo Kutsuna
- Department of Microbiology, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Tohru Miyoshi-Akiyama
- Pathogenic Microbe Laboratory, Research Institute, National Center for Global Health and Medicine (NCGM), Shinjuku, Japan
| | - Yuki Muramatsu
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Kisarazu, Japan
| | - Moriyuki Hamada
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Kisarazu, Japan
| | - Junko Tomida
- Department of Microbiology, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
| | - Ken Kikuchi
- Department of Infectious Diseases, Tokyo Women's Medical University, Shinjuku, Japan
| | - Yoshiaki Kawamura
- Department of Microbiology, School of Pharmacy, Aichi Gakuin University, Nagoya, Japan
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3
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Ho HH, Chen CW, Yi TH, Huang YF, Kuo YW, Lin JH, Chen JF, Tsai SY, Chan LP, Liang CH. Novel application of a Co-Fermented postbiotics of TYCA06/AP-32/CP-9/collagen in the improvement of acne vulgaris-A randomized clinical study of efficacy evaluation. J Cosmet Dermatol 2022; 21:6249-6260. [PMID: 35818134 DOI: 10.1111/jocd.15228] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 07/07/2022] [Indexed: 12/27/2022]
Abstract
BACKGROUND Acne vulgaris is a chronic inflammatory skin disease. If skin lesions are not treated well in time, they can leave a permanent impact on the appearance and a negative influence on personal confidence. The common therapy for acne symptom includes antibiotics, benzoyl peroxide, and azeleic acid. However, those medications have side effects, and the long-term use should be cautious. Therefore, it is necessary to develop a safe and effective material, which is more suitable for daily use. OBJECTIVE Collagen was selected to co-ferment with three probiotic strains TYCA06/AP-32/CP-9 (TAC) due to its excellent feature on wound healing. The fermented material was added into cosmetic gel and applied on subjects' acne lesions. The antimicrobial activity against Propionibacterium acnes and anti-inflammation effect around lesion area were investigated in a 4-week clinical study. MATERIAL AND METHODS An anti-P. acnes assay, a keratinocytes HaCaT cell-based wound healing assay, and a cytokine assay on thymic stromal lymphopoietin (TSLP) and interleukin (IL)-33 were used to evaluate the function of the fermented material in vitro. The TAC/Collagen formula was further incorporated into a cosmetic gel, and the human clinical trial was carried out by applying this gel on 20 volunteers' face with acne vulgaris. The moisture score, sebum content, inflammation, porphyrins numbers, and brown spot number of whole face were observed and recorded. RESULTS The postbiotics of the TAC/Collagen displayed a good growth inhibition against P. acnes and reduced TSLP and IL-33 inflammation in vitro. This TAC/Collagen formula enhanced the wound healing in HaCaT cell culture. The result of the clinical trial showed the TAC/Collagen gel improved the moisture score and inflammation index of the skin in vivo. In addition, this TAC/Collagen gel also improved the wound healing of acne symptom in volunteers with acne vulgaris. Moreover, this TAC/Collagen gel reduced the number of the porphyrins and brown spots on facial skin. CONCLUSION These postbiotics of TAC/Collagen have beneficial effects on skin health and are able to ameliorate the redness, inflammation, and acne symptom in acne vulgaris patients.
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Affiliation(s)
| | | | | | | | - Yi-Wei Kuo
- Glac Biotech Co., Ltd., Tainan City, Taiwan
| | | | | | | | - Leong-Perng Chan
- Department of Otorhinolaryngology-Head and Neck Surgery, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Otorhinolaryngology-Head and Neck Surgery, Faculty of Medicine, College of Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Hua Liang
- Department of Cosmetic Science and Institute of Cosmetic Science, Chia Nan University of Pharmacy and Science, Tainan, Taiwan
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Ghaedrahmat Z, Ghafari S, Almasi H, Baboli Z, Neisi A. Effective bioremediation of petroleum‐contaminated saline soil using halotolerant
Bacillus
strains isolated from the Persian Gulf. J Basic Microbiol 2022; 62:1429-1439. [DOI: 10.1002/jobm.202200144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 08/24/2022] [Accepted: 09/10/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Zeinab Ghaedrahmat
- Department of Environmental Health Engineering Shoushtar Faculty of Medical Sciences Shoushtar Iran
| | - Shokouh Ghafari
- Infectious Diseases Research Center, Birjand University of Medical Sciences, Deparment of Microbiogy Birjand University of Medical Sciences Birjand Iran
| | - Halime Almasi
- Department of Environmental Health Engineering Shoushtar Faculty of Medical Sciences Shoushtar Iran
| | - Zeynab Baboli
- Department of Environmental Health Engineering Behbahan Faculty of Medical Sciences Behbahan Iran
| | - Abdolkazem Neisi
- Department of Environmental Health Engineering, School of Health, Ahvaz Jundishapur University of Medical Sciences; Environmental Technology Research Center Ahvaz jundishapur University of Medical Sciences Ahvaz Iran
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Maheshwari R, Kumar P, Bhutani N, Suneja P. Exploration of plant growth-promoting endophytic bacteria from Pisum sativum and Cicer arietinum from South-West Haryana. J Basic Microbiol 2022; 62:857-874. [PMID: 35655367 DOI: 10.1002/jobm.202100575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 04/29/2022] [Accepted: 05/14/2022] [Indexed: 11/07/2022]
Abstract
In the present study, nonrhizobial endophytes were isolated from Pisum sativum and Cicer arietinum from Haryana, India. A total of 355 bacterial endophytes were screened for plant growth promoting traits. Out of all, 96 bacterial endophytes were selected based on morphological characters and multi-PGP traits, and their diversity analyzed by amplified ribosomal DNA restriction analysis. Based on their ARDRA profile, the 25 representative isolates (12 from P. sativum and 13 from C. arietinum), were selected and identified by 16S ribosomal DNA sequencing. Genetic relatedness based on BLAST analysis revealed the similarity of these isolates with members of three prominent phyla, that is, Proteobacteria, Firmicutes, and Actinobacteria. The dominant cluster, Firmicutes, constituted 60% of the isolates, assigned to four different genera, Bacillus, Staphylococcus, Ornithinibacillus, and Lysinibacillus. Phylum α-proteobacteria included two genera, namely Paenochrobactrum and Ochrobactrum and three genera in phylum γ-proteobacteria, namely Pseudomonas, Pantoea and Proteus. The phylum Actinobacteria was constituted of two genera, Microbacterium and Arthrobacter. Bacillus zhangzhouensis, Bacillus safensis, Arthrobacter enclensis from P. sativum and Bacillus haynesii, Paenochrobactrum sp. from C. arietinum are documented as plant growth promoting endophytic bacteria for the first time in the present study. The in vitro and in vivo assessment based on bonitur score revealed that the endophytic isolates Bacillus mojavensis PRN2, Pseudomonas chlororaphis PHN9, B. safensis PRER2, Pseudomonas sp. RCP1, Pseudomonas lini PRN1 and B. haynensii RCP3 from P. sativum and C. arietinum significantly enhanced the plant growth parameters. Therefore, these potential isolates can be further harnessed for preparation of bioformulations to enhance sustainable agriculture.
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Affiliation(s)
- Rajat Maheshwari
- Department of Microbiology, Plant-Microbe Interaction Laboratory, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Pradeep Kumar
- Department of Microbiology, Plant-Microbe Interaction Laboratory, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Namita Bhutani
- Department of Microbiology, Plant-Microbe Interaction Laboratory, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Pooja Suneja
- Department of Microbiology, Plant-Microbe Interaction Laboratory, Maharshi Dayanand University, Rohtak, Haryana, India
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Asharaf S, Chakraborty K. Pharmacological potential of seaweed-associated heterotrophic Firmicutes. Lett Appl Microbiol 2022; 75:1042-1054. [PMID: 35771159 DOI: 10.1111/lam.13780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 05/11/2022] [Accepted: 06/21/2022] [Indexed: 11/27/2022]
Abstract
Seaweed-associated bacterial symbionts are sources of potential pharmacological properties. The present study resulted in the culture-dependent isolation of bioactive heterotrophs belonging to the bacterial phylum Firmicutes, which were dominated more than 30% of the 127 cultivable isolates, among which 23 of them showed potential antimicrobial activities against a wide range of pathogens. The symbionts isolated from the seaweed Sargassum wightii showed significant bioactivity. Those were characterised as Bacillus safensis MTCC13040, B. valismortis MTCC13041, B. velezensis MTCC13044, B. methylotrophicus MTCC13042, Oceanobacillus profundus MTCC13045, B. tequilensis MTCC13043, and B. altitudinis MTCC13046. The organic extracts of the studied isolates showed potential antimicrobial properties against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococci (minimum inhibitory concentration 6.25-12.5 μg ml-1 ). The organic extract of B. altitudinis MTCC13046 displayed significantly greater radical quenching ability (IC90 133 μg ml-1 , p < 0.05) other than attenuating hydroxymethyl glutaryl coenzyme A reductase (IC90 10.21 μg ml-1 , p < 0.05) and angiotensin converting enzyme-1 (IC90 498 μg ml-1 , p < 0.05) relative to other studied heterotrophs. The organic extract of B. tequilensis MTCC13043 displayed significantly greater attenuation potential against pro-inflammatory 5-lipooxygenase (IC90 5.94 μg ml-1 , p < 0.05) and dipeptidyl peptidase-4 (IC90 271 μg ml-1 , p < 0.05). The seaweed-associated B. altitudinis MTCC13046 and B. tequilensis MTCC13043 could be used to develop promising pharmacological leads.
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Affiliation(s)
- Sumayya Asharaf
- Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No, 1603, Cochin, -682018, Kerala State, India.,Faculty of Marine Sciences, Lakeside Campus, Cochin University of Science and Technology, Cochin, Kerala State, India
| | - Kajal Chakraborty
- Marine Biotechnology Division, Central Marine Fisheries Research Institute, Ernakulam North, P.B. No, 1603, Cochin, -682018, Kerala State, India
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Mehler J, Behringer KI, Rollins RE, Pisarz F, Klingl A, Henle T, Heermann R, Becker NS, Hellwig M, Lassak J. Identification of Pseudomonas asiatica subsp. bavariensis str. JM1 as the first N ε -carboxy(m)ethyllysine degrading soil bacterium. Environ Microbiol 2022; 24:3229-3241. [PMID: 35621031 DOI: 10.1111/1462-2920.16079] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 11/03/2022]
Abstract
Thermal food processing leads to the formation of advanced glycation end products (AGE) such as Nε -carboxymethyllysine (CML). Accordingly, these non-canonical amino acids are an important part of the human diet. However, CML is only partially decomposed by our gut microbiota and up to 30% are excreted via feces and, hence, enter the environment. In frame of this study, we isolated a soil bacterium that can grow on CML as well as its higher homologue Nε -carboxyethyllysine (CEL) as sole source of carbon. Bioinformatic analyses upon whole genome sequencing revealed a subspecies of Pseudomonas asiatica, which we named 'bavariensis'. We performed a metabolite screening of P. asiatica subsp. bavariensis str. JM1 grown either on CML or CEL and identified N-carboxymethylaminopentanoic acid (CM-APA), and N-carboxyethylaminopentanoic acid (CE-APA), respectively. We further detected α-aminoadipate as intermediate in the metabolism of CML. These reaction products suggest two routes of degradation: While CEL seems to be predominantly processed from the α-C-atom, decomposition of CML can also be initiated with cleavage of the carboxymethyl group and under the release of acetate. Thus, our study provides novel insights into the metabolism of two important AGEs and how these are processed by environmental bacteria. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Judith Mehler
- Division of Microbiology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Martinsried, Germany
| | - Kim Ina Behringer
- Technische Universität Braunschweig - Institute of Food Chemistry, Braunschweig, Germany
| | - Robert Ethan Rollins
- Division of Evolutionary Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Martinsried, Germany
| | - Friederike Pisarz
- Institute of Molecular Physiology, Microbiology and Wine Research, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Andreas Klingl
- Division of Botany, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Martinsried, Germany
| | - Thomas Henle
- Chair of Food Chemistry, Technische Universität Dresden, D-01062, Dresden, Germany
| | - Ralf Heermann
- Institute of Molecular Physiology, Microbiology and Wine Research, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Noémie S Becker
- Division of Evolutionary Biology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Martinsried, Germany
| | - Michael Hellwig
- Technische Universität Braunschweig - Institute of Food Chemistry, Braunschweig, Germany.,Chair of Special Food Chemistry, Technische Universität Dresden, D-01062, Dresden, Germany
| | - Jürgen Lassak
- Division of Microbiology, Faculty of Biology, Ludwig-Maximilians-Universität München, Planegg, Martinsried, Germany
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Runtuvuori‐Salmela A, Kunttu HMT, Laanto E, Almeida GMF, Mäkelä K, Middelboe M, Sundberg L. Prevalence of genetically similar Flavobacterium columnare phages across aquaculture environments reveals a strong potential for pathogen control. Environ Microbiol 2022; 24:2404-2420. [PMID: 35049114 PMCID: PMC9304149 DOI: 10.1111/1462-2920.15901] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/11/2022] [Indexed: 11/28/2022]
Abstract
Intensive aquaculture conditions expose fish to bacterial infections, leading to significant financial losses, extensive antibiotic use and risk of antibiotic resistance in target bacteria. Flavobacterium columnare causes columnaris disease in aquaculture worldwide. To develop a bacteriophage-based control of columnaris disease, we isolated and characterized 126 F. columnare strains and 63 phages against F. columnare from Finland and Sweden in 2017. Bacterial isolates were virulent on rainbow trout (Oncorhynchus mykiss) and fell into four previously described genetic groups A, C, E and G, with genetic groups C and E being the most virulent. Phage host range studied against a collection of 227 bacterial isolates (from 2013 to 2017) demonstrated modular infection patterns based on host genetic group. Phages infected contemporary and previously isolated bacterial hosts, but bacteria isolated most recently were generally resistant to previously isolated phages. Despite large differences in geographical origin, isolation year or host range of the phages, whole-genome sequencing of 56 phages showed high level of genetic similarity to previously isolated F. columnare phages (Ficleduovirus, Myoviridae). Altogether, this phage collection demonstrates a potential for use in phage therapy.
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Affiliation(s)
- Anniina Runtuvuori‐Salmela
- Department of Biological and Environmental Science and Nanoscience CenterUniversity of JyväskyläJyväskyläFinland
| | - Heidi M. T. Kunttu
- Department of Biological and Environmental Science and Nanoscience CenterUniversity of JyväskyläJyväskyläFinland
| | - Elina Laanto
- Department of Biological and Environmental Science and Nanoscience CenterUniversity of JyväskyläJyväskyläFinland
- Faculty of Biological and Environmental SciencesMolecular and Integrative Biosciences Research Programme, University of HelsinkiHelsinkiFinland
| | - Gabriel M. F. Almeida
- Department of Biological and Environmental Science and Nanoscience CenterUniversity of JyväskyläJyväskyläFinland
- Faculty of Biosciences, Fisheries and Economics, Norwegian College of Fishery ScienceUiT The Arctic University of NorwayTromsøNorway
| | - Kati Mäkelä
- Department of Biological and Environmental Science and Nanoscience CenterUniversity of JyväskyläJyväskyläFinland
| | - Mathias Middelboe
- Department of Biology, Marine Biological SectionUniversity of CopenhagenHelsingørDenmark
| | - Lotta‐Riina Sundberg
- Department of Biological and Environmental Science and Nanoscience CenterUniversity of JyväskyläJyväskyläFinland
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9
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Dai C, Hou Y, Xu H, Umego EC, Huang L, He R, Ma H. Identification of a thermophilic protease-producing strain and its application in solid-state fermentation of soybean meal. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2022; 102:2359-2370. [PMID: 34628645 DOI: 10.1002/jsfa.11574] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 09/13/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Thermophiles can thrive at 50-80 °C and produce some enzymes with special promise for biocatalysis. A thermophilic protease-producing strain YYC4 was isolated from Yunyan cigarette and employed in solid-state fermentation (SSF) of unsterilized soybean meal (SBM). RESULTS The isolate was identified as Bacillus licheniformis based on appearance of colonies, microscopic observation and 16S rDNA sequencing. After SSF, soluble and crude protein contents in SBM increased from 49.24 to 185.73 g kg-1 and from 404.18 to 479.46 g kg-1 , respectively, under the fermentation conditions of 107 cfu g-1 inoculation of strain YYC4, 1:1.8 (g mL-1 ) SBM to distilled water, 1.2 g kg-1 magnesium sulphate addition, 55 °C and 48 h. During fermentation, pH of the medium increased from 6.30 to 9.09 and protease activity especially neutral protease increased significantly from 13.5 to 181.31 U g-1 . Meanwhile, trypsin inhibitor (TI) activity was decreased from 8.19 to 3.19 mg g-1 . The safety of fermented SBM (FSBM) was verified by acute toxicity animal experiment. Analysis of microbial community in FSBM showed that Bacillus licheniformis YYC4 as a dominant strain inhibited most of the other microorganisms pre-existing in the materials during fermentation. CONCLUSION Increments of soluble and crude protein by 277.19% and 18.63% and decrement of harmful TI by 61.05% in SBM were achieved using thermophilic SSF by Bacillus licheniformis YYC4, providing a basis for the application of thermophiles in fermentation industry in an environmentally friendly and energy-saving way. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Chunhua Dai
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Food Physical Processing, Jiangsu University, Zhenjiang, China
| | - Yizhi Hou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Haining Xu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Ekene C Umego
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Department of Food Science and Technology, University of Nigeria, Nsukka, Nigeria
| | - Liurong Huang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Ronghai He
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Food Physical Processing, Jiangsu University, Zhenjiang, China
| | - Haile Ma
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
- Institute of Food Physical Processing, Jiangsu University, Zhenjiang, China
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10
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Miyoshi S, Okubo N, Mitsumori S. Isolation and identification of soil bacteria resistant to surfactants in washing detergents. J SURFACTANTS DETERG 2022. [DOI: 10.1002/jsde.12587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shin‐ichi Miyoshi
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama‐City Okayama Japan
| | - Naomi Okubo
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama‐City Okayama Japan
| | - Satoko Mitsumori
- Graduate School of Medicine, Dentistry and Pharmaceutical Sciences Okayama University Okayama‐City Okayama Japan
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11
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Qin QL, Wang ZB, Cha QQ, Liu SS, Ren XB, Fu HH, Sun ML, Zhao DL, McMinn A, Chen Y, Chen XL, Zhang YZ, Li PY. Biogeography of culturable marine bacteria from both poles reveals that 'everything is not everywhere' at the genomic level. Environ Microbiol 2021; 24:98-109. [PMID: 34913576 DOI: 10.1111/1462-2920.15870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Accepted: 12/06/2021] [Indexed: 01/27/2023]
Abstract
Based on 16S rRNA gene analyses, the same bacterial operational taxonomic units (OTUs) are common to both the Arctic and Antarctic oceans, supporting the concept 'everything is everywhere'. However, whether the same OTUs from both poles have identical genomes, i.e. whether 'everything is still everywhere' at the genomic level has not yet been examined systematically. Here, we isolated, sequenced and compared the genomes of 45 culturable marine bacteria belonging to three genera of Salinibacterium, Psychrobacter and Pseudoalteromonas from both polar oceans. The bacterial strains with identical 16S rRNA genes were common to both poles in every genus, and four identical genomes were detected in the genus Salinibacterium from the Arctic region. However, no identical genomes were observed from opposite poles in this study. Our data, therefore, suggest that 'everything is not everywhere' at the genomic level. The divergence time between bacteria is hypothesized to exert a strong impact on the bacterial biogeography at the genomic level. The geographical isolation between poles was observed for recently diverged, highly similar genomes, but not for moderately similar genomes. This study thus improves our understanding of the factors affecting the genomic-level biogeography of marine microorganisms isolated from distant locations.
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Affiliation(s)
- Qi-Long Qin
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China.,College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Zhi-Bin Wang
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China
| | - Qian-Qian Cha
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China
| | - Sha-Sha Liu
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China
| | - Xue-Bing Ren
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China
| | - Hui-Hui Fu
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China
| | - Mei-Ling Sun
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China
| | - Dian-Li Zhao
- Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China
| | - Andrew McMinn
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China.,Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tas., Australia
| | - Yin Chen
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China.,School of Life Sciences, University of Warwick, Coventry, UK
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China
| | - Yu-Zhong Zhang
- College of Marine Life Sciences, and Frontiers Science Center for Deep Ocean Multispheres and Earth System, Ocean University of China, Qingdao, China.,Laboratory for Marine Biology and Biotechnology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, China.,Marine Biotechnology Research Center, State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China
| | - Ping-Yi Li
- State Key Laboratory of Microbial Technology, School of Environmental Science and Engineering, Shandong University, Qingdao, China
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12
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Ishikawa Y, Saiki K, Urano-Tashiro Y, Yamanaka Y, Takahashi Y. Expression and diversity of the sialic acid-binding adhesin and its homologs associated with oral streptococcal infection. Microbiol Immunol 2021; 66:59-66. [PMID: 34783072 DOI: 10.1111/1348-0421.12950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 10/13/2021] [Accepted: 11/06/2021] [Indexed: 11/29/2022]
Abstract
Streptococcus gordonii, one of the early colonizers of oral biofilms, is involved in the development of dental caries, periodontal disease, and infective endocarditis. The Hsa adhesin of S. gordonii DL1 has the ability to bind strongly to the terminal sialic acid groups of host glycoproteins via the binding region, NR2, which is important for the pathogenicity of S. gordonii DL1. Low similarity with the NR2 of Hsa homologs among other streptococcal species has been reported. However, the reports have been limited to certain strains. This study attempted to assess frequency of the expression on the bacterial cell surface and to analyze the diversity of Hsa homologs among different wild strains of oral streptococci. We isolated 186 wild-type strains of oral streptococci from healthy volunteers and analyzed their hemagglutinating activity on human erythrocytes and their Hsa homologs and NR2 homologous regions by dot immunoblotting using anti-Hsa and anti-NR2 antisera, respectively. We found 30 strains reacted with anti-NR2 antiserum (NR2-positive) and determined the sequence of the NR2 regions. Many strains with high hemagglutinating activity were also NR2-positive, suggesting that the NR2 region may be associated with hemagglutinating activity. Among the NR2-positive strains, four different amino acid sequence patterns were observed, demonstrating diversity in the NR2 region. Notably, S. gordonii strains frequently possessed Hsa homologs and NR2-like antigens compared to other streptococci. It is speculated that the possessing frequency of Hsa homologs and the amino acid sequence of NR2 region may vary among streptococcal species. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Yuiko Ishikawa
- Department of Microbiology, The Nippon Dental University School of Life Dentistry at Tokyo, Japan
| | - Keitarou Saiki
- Department of Microbiology, The Nippon Dental University School of Life Dentistry at Tokyo, Japan
| | - Yumiko Urano-Tashiro
- Department of Microbiology, The Nippon Dental University School of Life Dentistry at Tokyo, Japan
| | - Yuki Yamanaka
- Department of Microbiology, The Nippon Dental University School of Life Dentistry at Tokyo, Japan
| | - Yukihiro Takahashi
- Department of Microbiology, The Nippon Dental University School of Life Dentistry at Tokyo, Japan
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13
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Palmer JL, Hilton S, Picot E, Bending GD, Schäfer H. Tree phyllospheres are a habitat for diverse populations of CO-oxidizing bacteria. Environ Microbiol 2021; 23:6309-6327. [PMID: 34523801 DOI: 10.1111/1462-2920.15770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/21/2021] [Accepted: 09/08/2021] [Indexed: 11/28/2022]
Abstract
Carbon monoxide (CO) is both a ubiquitous atmospheric trace gas and an air pollutant. While aerobic CO-degrading microorganisms in soils and oceans are estimated to remove ~370 Tg of CO per year, the presence of CO-degrading microorganisms in above-ground habitats, such as the phyllosphere, and their potential role in CO cycling remains unknown. CO-degradation by leaf washes of two common British trees, Ilex aquifolium and Crataegus monogyna, demonstrated CO uptake in all samples investigated. Based on the analyses of taxonomic and functional genes, diverse communities of candidate CO-oxidizing taxa were identified, including members of Rhizobiales and Burkholderiales which were abundant in the phyllosphere at the time of sampling. Based on predicted genomes of phyllosphere community members, an estimated 21% of phyllosphere bacteria contained CoxL, the large subunit of CO-dehydrogenase. In support of this, data mining of publicly available phyllosphere metagenomes for genes encoding CO-dehydrogenase subunits demonstrated that, on average, 25% of phyllosphere bacteria contained CO-dehydrogenase gene homologues. A CO-oxidizing Phyllobacteriaceae strain was also isolated from phyllosphere samples which contains genes encoding both CO-dehydrogenase as well as a ribulose-1,5-bisphosphate carboxylase-oxygenase. These results suggest that the phyllosphere supports diverse and potentially abundant CO-oxidizing bacteria, which are a potential sink for atmospheric CO.
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Affiliation(s)
- Jess L Palmer
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | - Sally Hilton
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | - Emma Picot
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | - Gary D Bending
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
| | - Hendrik Schäfer
- School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK
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14
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Bez C, Esposito A, Thuy HD, Nguyen Hong M, Valè G, Licastro D, Bertani I, Piazza S, Venturi V. The rice foot rot pathogen Dickeya zeae alters the in-field plant microbiome. Environ Microbiol 2021; 23:7671-7687. [PMID: 34398481 PMCID: PMC9292192 DOI: 10.1111/1462-2920.15726] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 08/13/2021] [Indexed: 01/04/2023]
Abstract
Studies on bacterial plant diseases have thus far been focused on the single bacterial species causing the disease, with very little attention given to the many other microorganisms present in the microbiome. This study intends to use pathobiome analysis of the rice foot rot disease, caused by Dickeya zeae, as a case study to investigate the effects of this bacterial pathogen to the total resident microbiome and to highlight possible interactions between the pathogen and the members of the community involved in the disease process. The microbiome of asymptomatic and the pathobiome of foot‐rot symptomatic field‐grown rice plants over two growing periods and belonging to two rice cultivars were determined via 16S rRNA gene amplicon sequencing. Results showed that the presence of D. zeae is associated with an alteration of the resident bacterial community in terms of species composition, abundance and richness, leading to the formation of microbial consortia linked to the disease state. Several bacterial species were significantly co‐presented with the pathogen in the two growing periods suggesting that they could be involved in the disease process. Besides, culture‐dependent isolation and in planta inoculation studies of a bacterial member of the pathobiome, identified as positive correlated with the pathogen in our in silico analysis, indicated that it benefits from the presence of D. zeae. A similar microbiome/pathobiome experiment was also performed in a symptomatically different rice disease evidencing that not all plant diseases have the same consequence/relationship with the plant microbiome. This study moves away from a pathogen‐focused stance and goes towards a more ecological perception considering the effect of the entire microbial community which could be involved in the pathogenesis, persistence, transmission and evolution of plant pathogens.
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Affiliation(s)
- Cristina Bez
- International Centre for Genetic Engineering and Biotechnology Padriciano, 99, Trieste, 34149, Italy
| | - Alfonso Esposito
- International Centre for Genetic Engineering and Biotechnology Padriciano, 99, Trieste, 34149, Italy
| | - Hang Dinh Thuy
- VNU Institute of Microbiology and Biotechnology, Hanoi, Vietnam
| | | | - Giampiero Valè
- DiSIT, Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Piazza San Eusebio 5, Vercelli, 13100, Italy
| | - Danilo Licastro
- ARGO Laboratorio Genomica ed Epigenomica, AREA Science Park, Basovizza, Trieste, 34149, Italy
| | - Iris Bertani
- International Centre for Genetic Engineering and Biotechnology Padriciano, 99, Trieste, 34149, Italy
| | - Silvano Piazza
- International Centre for Genetic Engineering and Biotechnology Padriciano, 99, Trieste, 34149, Italy
| | - Vittorio Venturi
- International Centre for Genetic Engineering and Biotechnology Padriciano, 99, Trieste, 34149, Italy
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15
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Yurimoto H, Iguchi H, Di Thien DT, Tani A, Okumoto Y, Ota A, Yamauchi T, Akashi T, Sakai Y. Methanol bioeconomy: promotion of rice crop yield in paddy fields with microbial cells prepared from natural gas-derived C 1 compound. Microb Biotechnol 2021; 14:1385-1396. [PMID: 33300676 PMCID: PMC8313254 DOI: 10.1111/1751-7915.13725] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/20/2020] [Accepted: 11/18/2020] [Indexed: 12/20/2022] Open
Abstract
Methylotrophs, which can utilize methanol as a sole carbon source, are promising microorganisms to be exploited in a methanol-based bioeconomy, in which a variety of useful compounds are biotechnologically produced from natural gas-derived methanol. Pink-pigmented facultative methylotrophs (PPFMs) are common plant phyllospheric bacteria and are known to enhance seedling growth and total biomass of various plants. However, improvement of crop yield by inoculation of PPFMs at the field level has not been well investigated. We herein describe improvement of crop yield of several rice cultivars by foliar spraying of PPFMs. After selection of PPFM strains and rice cultivars by the in vitro seedling growth test, we further conducted paddy field experiments. The crop yield of the sake-brewing rice Oryza sativa cultivar Hakutsurunishiki was reproducibly improved in a commercial paddy field for over a 5-year period. A one-time foliar spray of PPFM cells (living or killed) or a cell wall polysaccharide fraction, after the heading date, acted in the phyllosphere and effectively improved crop yield. Our results show that the established process with PPFMs is feasible for improvement of food production in the methanol bioeconomy.
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Affiliation(s)
- Hiroya Yurimoto
- Division of Applied Life SciencesGraduate School of AgricultureKyoto UniversityKyotoJapan
| | - Hiroyuki Iguchi
- Division of Applied Life SciencesGraduate School of AgricultureKyoto UniversityKyotoJapan
- Department of Agriculture and Food TechnologyFaculty of Bioenvironmental ScienceKyoto University of Advanced ScienceKyotoJapan
| | - Do Thi Di Thien
- Division of Applied Life SciencesGraduate School of AgricultureKyoto UniversityKyotoJapan
| | - Akio Tani
- Institute of Plant Science and ResourcesOkayama UniversityOkayamaJapan
| | - Yutaka Okumoto
- Division of Agronomy and Horticulture ScienceGraduate School of AgricultureKyoto UniversityKyotoJapan
- Present address:
Faculty of AgricultureSetsunan UniversityOsakaJapan
| | - Atsushi Ota
- Hakutsuru Sake Brewing Corporation, Ltd.HyogoJapan
| | | | | | - Yasuyoshi Sakai
- Division of Applied Life SciencesGraduate School of AgricultureKyoto UniversityKyotoJapan
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16
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Leng W, Gao R, Wu X, Zhou J, Sun Q, Yuan L. Genome sequencing of cold-adapted Planococcus bacterium isolated from traditional shrimp paste and protease identification. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:3225-3236. [PMID: 33222174 DOI: 10.1002/jsfa.10952] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/17/2020] [Accepted: 11/22/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Psychrophiles have evolved to adapt to freezing environments, and cold-adapted enzymes from these organisms can maintain high catalytic activity at low temperature. The use of cold-adapted enzymes has great potential for the revolution of food and molecular biology industries. RESULTS In this study, four different strains producing protease were isolated from traditional fermented shrimp paste, one of which, named Planococcus maritimus XJ11 by 16S rRNA nucleotide sequence analysis, exhibited the largest protein hydrolysis clear zone surrounding the colonies. Meanwhile, the strain P. maritimus XJ11 was selected for further investigation because of its great adaptation to low temperature, low salinity and alkaline environment. The enzyme activity assay of P. maritimus XJ11 indicated that the optimum conditions for catalytic activity were pH 10.0 and 40 °C. Moreover, the enzyme also showed an increasing activity with temperatures from 10 to 40 °C and retained more than 67% activity of the maximum over a broad range of salinity (50-150 g L-1 ). Genome sequencing analysis revealed that strain XJ11 possessed one circular chromosome of 3 282 604 bp and one circular plasmid of 67 339 bp, with a total number of 3293 open reading frames (ORFs). Besides, 21 genes encoding protease, including three serine proteases, were identified through the NR database. CONCLUSION Cold-adapted bacterium P. maritimus XJ11 was capable of producing alkaline proteases with high catalytic efficiency at low or moderate temperatures. Furthermore, the favorable psychrophilic and enzymatic characters of strain P. maritimus XJ11 seem to have a promising potential for industrial application. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Weijun Leng
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Ruichang Gao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Xiaoyun Wu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Jing Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Quancai Sun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Li Yuan
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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17
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Dos Santos LDR, Furlan JPR, Gallo IFL, Ramos MS, Savazzi EA, Stehling EG. Occurrence of multidrug-resistant Enterococcus faecium isolated from environmental samples. Lett Appl Microbiol 2021; 73:237-246. [PMID: 33966285 DOI: 10.1111/lam.13508] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 03/31/2021] [Accepted: 05/01/2021] [Indexed: 12/11/2022]
Abstract
Enterococcus species are present in the microbiota of humans and animals and have also been described in the environment. Among the species, Enterococcus faecium is one of the main pathogens associated with nosocomial infections worldwide. Enterococcus faecium isolates resistant to different classes of antimicrobials have been increasingly reported, including multidrug-resistant (MDR) isolates in environmental sources, which is worrying. Therefore, this study aimed to characterize E. faecium isolates obtained from soil and water samples regarding antimicrobial resistance and virulence determinants. A total 40 E. faecium isolates were recovered from 171 environmental samples. All isolates were classified as MDR, highlighting the resistance to the fluoroquinolones class, linezolid and vancomycin. Furthermore, high-level aminoglycoside resistance and high-level ciprofloxacin resistance were detected in some isolates. Several clinically relevant antimicrobial resistance genes were found, including vanC1, ermB, ermC, mefAE, tetM, tetL, ant(6')-Ia, ant(4')-Ia, aph(3')-IIIa and aac(6')-Ie-aph(2″)-Ia. Three virulence genes were detected among the MDR E. faecium isolates, such as esp, gelE and ace. The results of this study contribute to a better understanding of MDR E. faecium isolates carrying antimicrobial resistance and virulence genes in environmental sources and report for the first time in the world the presence of vanC1-producing E. faecium isolated from soil.
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Affiliation(s)
- L D R Dos Santos
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - J P R Furlan
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - I F L Gallo
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - M S Ramos
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
| | - E A Savazzi
- Companhia Ambiental do Estado de São Paulo (CETESB), Ribeirão Preto, Brazil
| | - E G Stehling
- Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil
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18
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Senthilkumar M, Pushpakanth P, Arul Jose P, Krishnamoorthy R, Anandham R. Diversity and functional characterization of endophytic Methylobacterium isolated from banana cultivars of South India and its impact on early growth of tissue culture banana plantlets. J Appl Microbiol 2021; 131:2448-2465. [PMID: 33891792 DOI: 10.1111/jam.15112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 03/28/2021] [Accepted: 04/11/2021] [Indexed: 11/27/2022]
Abstract
AIMS This study aimed at determining the distribution, colonization and growth promoting nature of Methylobacterium spp. in tissue culture banana plantlets. METHODS AND RESULTS Leaf samples from different field grown banana cultivars were used for Methylobacterium spp., isolation. Metabolic profile and functional characterization for plant growth-promoting traits of the isolates were assessed. The isolates were confirmed using 16S rRNA gene sequencing analysis, which resulted in six distinct species of Methylobacterium namely M. radiotolerans, M. salsuginis, M. thiocyanatum, M. rhodesianum, M. rhodinum and M. populi. Methylobacterium spp. inoculation experiment was conducted under hydroponic system in tissue culture banana plantlets (germ free) with eight selected isolates. A significant increase in growth parameters of Methylobacterium treated plantlets compared to uninoculated control was observed. Methylobacterium salsuginis TNMB03-gfp29 was developed and colonization micrograph was obtained using confocal laser scanning microscopy (CLSM) and scanning electron microscopy in different parts of banana plantlets (root, stem and leaves). CONCLUSION Field grown banana plants found to harbour diverse endophytic Methylobacterium population. Our finding suggests that endophytic Methylobacterium species may provide significant plant growth promoting compounds/nutrients to the banana plants. The experimental results demonstrated the efficacy of Methylobacterium spp. as a potential bioinoculant and can be exploited as a phyllosphere and rhizosphere based bioinoculant for the initial establishment and growth of tissue culture banana plantlets. SIGNIFICANCE AND IMPACT OF THE STUDY This study extended our knowledge on the distribution of Methylobacterium spp. in banana plants and endophytic colonization nature of this particular genus in plants. In addition, efficient isolate (M. salsuginis TNMB03) identified in this study may be promoted as bio-inoculants for banana plants after field evaluation.
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Affiliation(s)
- M Senthilkumar
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | - P Pushpakanth
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | - P Arul Jose
- Department of Agricultural Microbiology, Agricultural College and Research Institute, Madurai, Tamil Nadu, India
| | - R Krishnamoorthy
- Department of Crop Management, Vanavarayar Institute of Agriculture, Pollachi, Tamil Nadu, India
| | - R Anandham
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
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19
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Alemneh AA, Zhou Y, Ryder MH, Denton MD. Is phosphate solubilizing ability in plant growth-promoting rhizobacteria isolated from chickpea linked to their ability to produce ACC deaminase? J Appl Microbiol 2021; 131:2416-2432. [PMID: 33884699 DOI: 10.1111/jam.15108] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 03/23/2021] [Accepted: 04/07/2021] [Indexed: 11/28/2022]
Abstract
AIMS Since most phosphate solubilizing bacteria (PSB) also produce 1-aminocyclopropane-1-carboxylate (ACC) deaminase, we investigated if there was an association between these two plant growth-promoting properties under in vitro conditions. METHODS AND RESULTS A total of 841 bacterial isolates were obtained using selective and enrichment isolation methods. ACC deaminase was investigated using in vitro methods and by sequencing the acdS gene. The effect of ACC deaminase on P solubilization was investigated further using five efficient PSB. ACC deaminase production ability was found amongst a wide range of bacteria belonging to the genera Bacillus, Burkholderia, Pseudomonas and Variovorax. The amount of ACC deaminase produced by PSB was significantly associated with the liberation of Pi from Ca-P when ACC was the sole N source. Ca-P solubilization was associated with the degree of acidification of the medium. Additionally, the P solubilization potential of PSB with (NH4 )2 SO4 was determined by the type of carboxylates produced. An in-planta experiment was conducted using Burkholderia sp. 12F on chickpea cv. Genesis-863 in sand : vermiculite (1 : 1 v/v) amended with rock phosphate and inoculation of this efficient PSB significantly increased growth, nodulation and P uptake of chickpea fertilized with rock phosphate. CONCLUSION ACC deaminase activity influenced the capacity of PSB to solubilize P from Ca-P when ACC was the sole N source and Burkholderia sp. 12F promoted the chickpea-Mesorhizobium symbiosis. SIGNIFICANCE AND IMPACT OF THE STUDY ACC deaminase activity could enhance the P solubilizing activity of rhizobacteria that improve plant growth.
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Affiliation(s)
- A A Alemneh
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia.,China-Australia Joint Laboratory for Soil Ecological Health and Remediation, The University of Adelaide, Glen Osmond, SA, Australia
| | - Y Zhou
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia.,China-Australia Joint Laboratory for Soil Ecological Health and Remediation, The University of Adelaide, Glen Osmond, SA, Australia
| | - M H Ryder
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia.,China-Australia Joint Laboratory for Soil Ecological Health and Remediation, The University of Adelaide, Glen Osmond, SA, Australia
| | - M D Denton
- School of Agriculture, Food and Wine, The University of Adelaide, Glen Osmond, SA, Australia.,China-Australia Joint Laboratory for Soil Ecological Health and Remediation, The University of Adelaide, Glen Osmond, SA, Australia
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20
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Baek HW, Bae JH, Lee YG, Kim SA, Min W, Shim S, Han NS, Seo JH. Dynamic interactions of lactic acid bacteria in Korean sourdough during back-slopping process. J Appl Microbiol 2021; 131:2325-2335. [PMID: 33797823 DOI: 10.1111/jam.15097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/19/2021] [Accepted: 03/28/2021] [Indexed: 11/28/2022]
Abstract
AIMS This study aimed to clarify the cause of quality reduction in Korean sourdough after successive back-slopping. METHODS AND RESULTS We investigated the dynamic changes in lactic acid bacteria during the back-slopping process using genetic fingerprinting techniques. During the initial propagation phases, the dominant lactic acid bacteria were Fructilactobacillus sanfranciscensis (<5 log CFU per g sourdough), Latilactobacillus curvatus (9·5 log CFU per g sourdough) and Levilactobacillus brevis (6·5 log CFU per g sourdough). However, after the 11th propagation, F. sanfranciscensis became more prominent (>9·0 log CFU per g sourdough), whereas L. curvatus and L. brevis rapidly decreased. Monitoring these bacteria in the co-culture system revealed that acid-tolerant F. sanfranciscensis rapidly utilized maltose (1·65 g l-1 h-1 ) and produced large amounts of lactic acid, whereas L. brevis and L. curvatus consumed maltose slowly and L. curvatus was poorly tolerant to lactic acid. CONCLUSION The results indicate that competition exists between the lactic acid bacteria in sourdough during the back-slopping process, and microbial succession by acid-tolerant species results in quality reduction of sourdough. SIGNIFICANCE AND IMPACT OF THE STUDY This study uncovered the cause of microbial changes during the propagation of Korean sourdough and proposed a strategy to develop starters to produce high-quality bakery products.
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Affiliation(s)
- H-W Baek
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Seoul National University, Seoul, Republic of Korea
| | - J-H Bae
- Brain Korea 21 Center for Bio-Health Industry, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - Y-G Lee
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Seoul National University, Seoul, Republic of Korea
| | - S-A Kim
- Brain Korea 21 Center for Bio-Health Industry, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - W Min
- Department of Food Science and Development, Kyungil University, Gyeongsan, Republic of Korea
| | - S Shim
- Research Institute of Food and Biotechnology, SPC Group, Seoul, Republic of Korea
| | - N S Han
- Brain Korea 21 Center for Bio-Health Industry, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Republic of Korea
| | - J-H Seo
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Seoul National University, Seoul, Republic of Korea.,Research Institute of Food and Biotechnology, SPC Group, Seoul, Republic of Korea
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21
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Kang MK, Kim MH, Liu MJ, Jin CZ, Park SH, Lee JM, Kim J, Park DJ, Park HR, Kim YH, Kim CJ. Nematicidal activity of teleocidin B4 isolated from Streptomyces sp. against pine wood nematode, Bursaphelenchus xylophilus. PEST MANAGEMENT SCIENCE 2021; 77:1607-1615. [PMID: 32954637 DOI: 10.1002/ps.6095] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 09/21/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Pine wilt disease (PWD) is a plant disease that causes serious damage to pine trees. PWD occurs when the host plant is infected with pinewood nematode (PWN), Bursaphelenchus xylophilus. In this study, a compound with nematicidal activity was isolated from actinomycetes and its efficacy was investigated in vitro. RESULT We screened and selected Streptomyces sp. 680560, which had nematicidal activity against B. xylophilus. Based on 16S rRNA sequence analysis, it showed 99.93% similarity with Streptomyces blastmyceticus NRRB-5480T . Furthermore, the active compound was isolated and identified as teleocidin B4. Teleocidin B4 at concentrations ranging from 6.25 to 100 μM had low nematicidal activity after 24 and 36 h against adult and stage juveniles (J2) of B. xylophilus, but after 48 h nematicidal activity exceeded 95%. The rate of inhibition of egg hatching for Teleocidin B4 6.25, 12.5, 25, 50, and 100 μM was confirmed to be dose-dependently inhibited after 48 h of treatment. Teleocidin B4 is not only toxic to hatched B. xylophilus, but also affects egg hatching. CONCLUSION This study was carried out to isolate actinomycete metabolites from pine tree endophytes from various natural environments for control of PWD. A compound with nematicidal activity was isolated from a selected strain and its structure was identified as teleocidin B4. The nematicidal effect of the isolated active substance, teleocidin B4, was confirmed. This is the first report of the effect of teleocidin B4 on B. xylophilus, suggesting its possibility as a PWD control agent. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Min-Kyoung Kang
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
- College of Pharmacy, Chungnam National University, Daejeon, South Korea
| | - Min-Hee Kim
- Anticancer Agent Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju-si, South Korea
- Department of Food Science and Biotechnology, Kyungnam University, Changwon-si, South Korea
| | - Min-Jiao Liu
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Chun Zhi Jin
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - So Hee Park
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Jong Min Lee
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Junheon Kim
- Forest Insect Pests and Diseases, National Institute of Forest Science, Seoul, South Korea
| | - Dong-Jin Park
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
| | - Hae-Ryong Park
- Department of Food Science and Biotechnology, Kyungnam University, Changwon-si, South Korea
| | - Young Ho Kim
- College of Pharmacy, Chungnam National University, Daejeon, South Korea
| | - Chang-Jin Kim
- Industrial Biomaterial Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, South Korea
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22
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Bing XL, Winkler J, Gerlach J, Loeb G, Buchon N. Identification of natural pathogens from wild Drosophila suzukii. PEST MANAGEMENT SCIENCE 2021; 77:1594-1606. [PMID: 33342014 DOI: 10.1002/ps.6235] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/15/2020] [Accepted: 12/19/2020] [Indexed: 06/12/2023]
Abstract
BACKGROUND Drosophila suzukii (Matsumura, 1931) (spotted wing drosophila), an invasive species, has recently become a significant global pest of soft-skinned fruits such as berries. Unlike other Drosophila species, female D. suzukii have evolved a specialized sharp, serrated ovipositor that pierces and penetrates ripe and ripening fruits, causing them to lose commercial value and preventing their sale. A first step for the development of biological control agents for pest management may be achieved through the identification of microbes infectious for D. suzukii in the wild. RESULTS We first determined that D. suzukii is susceptible to chemicals commonly used to rear Drosophilids in the laboratory and established a diet able to sustain healthy D. suzukii growth. Using this diet, we demonstrated that of 25 species of culturable bacteria and fungi isolated from field-collected D. suzukii, eight microbes decreased host survival when injected. Three of the eight bacteria (Alcaligenes faecalis, Achromobacter spanius and Serratia marcescens) were acutely pathogenic to both D. suzukii and Drosophila melanogaster adults by injection. Feeding of these bacteria resulted in susceptibility only in larvae. CONCLUSION We successfully identified multiple microbes from field-collected D. suzukii that are pathogenic to both larvae and adults through different routes of infection, some of which could be candidates for biocontrol of this species. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Xiao-Li Bing
- Department of Entomology, Cornell University, Ithaca, NY, USA
- Department of Entomology, Nanjing Agricultural University, Nanjing, China
| | - Jessica Winkler
- Department of Entomology, Cornell University, Ithaca, NY, USA
| | - Joseph Gerlach
- Department of Entomology, Cornell University, Ithaca, NY, USA
| | - Gregory Loeb
- Department of Entomology, Cornell University, Geneva, NY, USA
| | - Nicolas Buchon
- Department of Entomology, Cornell University, Ithaca, NY, USA
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23
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Lu L, Chang M, Han X, Wang Q, Wang J, Yang H, Guan Q, Dai S. Beneficial effects of endophytic Pantoea ananatis with ability to promote rice growth under saline stress. J Appl Microbiol 2021; 131:1919-1931. [PMID: 33754394 DOI: 10.1111/jam.15082] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/11/2021] [Accepted: 03/19/2021] [Indexed: 11/28/2022]
Abstract
AIMS Soil salinization severely inhibits plant growth, leading to a low crop yield. The aim of the current study was to isolate endophytic bacteria with the ability to promote rice growth under saline conditions. METHODS AND RESULTS We isolated eight salt-tolerant endophytic bacteria from rice roots. An isolated strain D1 was selected due to its ability to stimulate rice seed germination in the presence of NaCl, which was identified as Pantoea ananatis D1. It exhibited multiple plant growth-promoting traits including phosphate solubilization, production of indole-3-acetic acid, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase and siderophore. Inoculation of P. ananatis D1 obviously enhanced the rice root and shoot growth under normal and saline conditions. It also significantly increased the contents of chlorophyll, total soluble protein, and proline in salt-stressed rice seedlings. Moreover P. ananatis D1 could ameliorate the oxidative stress in rice induced by NaCl and Na2 CO3 treatment. The malondialdehyde content and various antioxidant enzyme activities were decreased by P. ananatis D1 inoculation in salt-affected rice. In addition, P. ananatis D1 showed a positive potential for limiting the Na+ accumulation and enhancing the K+ uptake, leading to an increase of 1·2-1·7 fold in K+ /Na+ ratio under saline environment. CONCLUSIONS Pantoea ananatis D1 has the ability to improve the salt tolerance of rice seedlings. SIGNIFICANCE AND IMPACT OF THE STUDY The application of plant growth-promoting bacteria (PGPB) is an eco-friendly strategy to improve plant tolerance towards abiotic stresses. We demonstrated that P. ananatis D1 could be used as an effective halotolerant PGPB to enhance rice growth in different salt-affected soils.
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Affiliation(s)
- L Lu
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, China.,College of Life Sciences, Northeast Forestry University, Harbin, China
| | - M Chang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, China.,College of Life Sciences, Northeast Forestry University, Harbin, China
| | - X Han
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Q Wang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - J Wang
- College of Life Sciences, Northeast Forestry University, Harbin, China
| | - H Yang
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, China.,College of Life Sciences, Northeast Forestry University, Harbin, China
| | - Q Guan
- Key Laboratory of Saline-alkali Vegetation Ecology Restoration (Northeast Forestry University), Ministry of Education, Harbin, China.,College of Life Sciences, Northeast Forestry University, Harbin, China
| | - S Dai
- Development Center of Plant Germplasm Resources, College of Life Sciences, Shanghai Normal University, Shanghai, China
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24
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Win TT, Bo B, Malec P, Fu P. The effect of a consortium of Penicillium sp. and Bacillus spp. in suppressing banana fungal diseases caused by Fusarium sp. and Alternaria sp. J Appl Microbiol 2021; 131:1890-1908. [PMID: 33694313 DOI: 10.1111/jam.15067] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 02/12/2021] [Accepted: 02/28/2021] [Indexed: 12/19/2022]
Abstract
AIMS This study sought to utilize indigenous soil micro-organisms to suppress wilt-causing fungal pathogens of the banana. METHODS AND RESULTS Fungal pathogens were isolated from wilt-affected rhizospheric soil, and potential antagonistic bacterial strains were isolated from healthy rhizospheric soil in the same area from which fungal pathogens were isolated. The antifungal activity of isolated micro-organisms against fungal pathogens was studied both in vitro and in vivo against fungal pathogens. It was found that Fusarium oxysporum and Alternaria sp. were pathogenic, while Penicillium sp., Bacillus velezensis and Bacillus subtilis were antagonistic. Moreover, it was seen that B. velezensis, B. subtilis and Penicillium sp. inhibited the growth of the two fungal pathogens in both in vitro and in vivo experiments. Further investigation indicated that B. velezensis, B. subtilis and Penicillium sp. were able to produce enzymatic antifungal compounds (chitinase and β-1,3-glucanase). The spray application around rhizome revealed that a combination of Bacillus spp. and Penicillium sp. in greenhouse conditions gave the highest reduction in disease severity by up to 60% to both fungal pathogens among the treatments. CONCLUSIONS Banana disease is seen to be induced not only by F. oxysporum but also by Alternaria sp. The isolated indigenous micro-organisms can effectively control both the pathogens. The combination of isolated antagonistic micro-organisms has thus demonstrated substantial potential for suppressing banana disease. SIGNIFICANCE AND IMPACT OF THE STUDY An antagonistic consortium isolated in this study has demonstrated remarkable potential for controlling fungal diseases caused by Fusarium sp. and Alternaria sp. Therefore, the use of indigenous microflora to improve disease suppression of banana plants against soil-borne pathogens is a preferable approach.
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Affiliation(s)
- T T Win
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China.,Biotechnology Research Department, Ministry of Education, Kyaukse, 05151, Myanmar
| | - B Bo
- Biotechnology Research Department, Ministry of Education, Kyaukse, 05151, Myanmar
| | - P Malec
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Krakow, Poland
| | - P Fu
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, China
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25
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Patel RR, Patel DD, Bhatt J, Thakor P, Triplett LR, Thakkar VR. Induction of pre-chorismate, jasmonate and salicylate pathways by Burkholderia sp. RR18 in peanut seedlings. J Appl Microbiol 2021; 131:1417-1430. [PMID: 33522007 DOI: 10.1111/jam.15019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/19/2021] [Accepted: 01/27/2021] [Indexed: 12/22/2022]
Abstract
AIMS To characterize the mechanisms by which bacteria in the peanut rhizosphere promote plant growth and suppress Aspergillus niger, the fungus that causes collar rot of peanut. METHODS AND RESULTS In all, 131 isolates cultured from the peanut rhizosphere were assayed for growth promotion in a seedling germination assay. The most effective isolate, RR18, was identified as Burkholderia sp. by 16S sequencing analysis. RR18 reduced collar rot disease incidence and increased the germination rate and biomass of peanut seeds, and had broad-spectrum antifungal activity. Quantitative analyses showed that RR18 induced long-lasting accumulation of jasmonic acid, salicylic acid and phenols, and triggered the activity of six defence enzymes related to these changes. Comparative proteomic analysis of treated and untreated seedlings revealed a clear induction of four abundant proteins, including a member of the pre-chorismate pathway, a regulator of clathrin-coated vesicles, a transcription factor and a hypothetical protein. CONCLUSION Burkholderia sp. RR18 promotes peanut growth and disease resistance, and stably induces two distinct defence pathways associated with systemic resistance. SIGNIFICANCE AND IMPACT OF THE STUDY This study demonstrates that a strain of the Burkholderia cepacia complex can elicit both salicylic- and jasmonic-acid-mediated defences, in addition to having numerous other beneficial properties.
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Affiliation(s)
- Ravikumar R Patel
- P. G. Department of Biosciences, Sardar Patel University, Gujarat, India.,Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Disha D Patel
- P. G. Department of Biosciences, Sardar Patel University, Gujarat, India
| | - Jaimika Bhatt
- P. G. Department of Biosciences, Sardar Patel University, Gujarat, India
| | - Parth Thakor
- P. G. Department of Biosciences, Sardar Patel University, Gujarat, India
| | - Lindsay R Triplett
- Department of Plant Pathology and Ecology, The Connecticut Agricultural Experiment Station, New Haven, CT, USA
| | - Vasudev R Thakkar
- P. G. Department of Biosciences, Sardar Patel University, Gujarat, India
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26
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Andreolli M, Lampis S, Brignoli P, Vallini G. Mesocosm-based simulations to optimize a bioremediation strategy for the effective restoration of wildfire-impacted soils contaminated with high-molecular-weight hydrocarbons. J Appl Microbiol 2021; 131:1249-1260. [PMID: 33507603 DOI: 10.1111/jam.15018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 01/03/2021] [Accepted: 01/23/2021] [Indexed: 11/29/2022]
Abstract
AIMS We obtained four microbial isolates from soil exposed to forest fire and evaluated their potential bioremediation activity when combined with a biosurfactant-producing bacterial strain for the decontamination of wildfire-impacted soil polluted with high-molecular-weight (HMW) hydrocarbons. METHODS AND RESULTS We established mesocosm trials to compare three bioremediation strategies: natural attenuation, bioaugmentation and biostimulation. Chemical analysis, culture-dependent and culture-independent methods were used to evaluate the bioremediation efficiency and speciation of the microbial cenoses based on these approaches. After treatment for 90 days, bioaugmentation removed 75·2-75·9% of the HMW hydrocarbons, biostimulation removed 63·2-69·5% and natural attenuation removed ~22·5%. Hydrocarbon degradation was significantly enhanced in the mesocosm supplemented with the biosurfactant-producing bacterial strain after 20 and 50 days of treatment compared to the other bioremediation strategies. CONCLUSIONS We found that the bioaugmentation approach was more effective than biostimulation and natural attenuation for the removal of HMW hydrocarbons from fire-impacted soil. SIGNIFICANCE AND IMPACT OF THE STUDY Our study showed that micro-organisms from wildfire-impacted soil show significant potential for bioremediation, and that biosurfactant-producing bacterial strains can be combined with them as part of an effective bioremediation strategy.
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Affiliation(s)
- M Andreolli
- Department of Biotechnology, University of Verona, Verona, Italy
| | - S Lampis
- Department of Biotechnology, University of Verona, Verona, Italy
| | - P Brignoli
- Centre for Geotechnologies, University of Siena, San Giovanni Valdarno, Italy
| | - G Vallini
- Department of Biotechnology, University of Verona, Verona, Italy
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27
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Brenes-Guillén L, Vidaurre-Barahona D, Morales S, Mora-López M, Sittenfeld A, Uribe-Lorío L. Novel Cyanobacterial Diversity Found in Costa Rican Thermal Springs Associated with Rincon de la Vieja and Miravalles Volcanoes: A Polyphasic Approach. JOURNAL OF PHYCOLOGY 2021; 57:183-198. [PMID: 33000870 DOI: 10.1111/jpy.13077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 08/28/2020] [Accepted: 09/09/2020] [Indexed: 06/11/2023]
Abstract
Central America is one of the most important biodiversity hot spots in the world, and Costa Rican microbial communities from thermal springs are the best characterized in the isthmus. Miravalles is an inactive quaternary stratovolcano, and the Rincón de la Vieja is a unique active volcano, in whose slopes diverse hydrothermal springs, such as Las Lilas, are located. These springs harbor extensive microbial mats, whose diversity has been studied. Based on their importance as primary producers, in this study we focused on cultured cyanobacterial diversity from two geothermal environments of northern Costa Rica. Several cultural, molecular and taxonomic techniques were employed to maximize the results of a polyphasic approach. Sample collection sites were physicochemically described, and strains were isolated and characterized by light and electron microscopy. Phylogenetic analysis was performed using 16S rRNA gene sequences and amplified ribosomal DNA restriction analysis (ARDRA). Fifty-six phylotypes were isolated and classified into 21 morphotypes and identified in 14 genera, some of them might be new species within these genera. Furthermore, according to phylogenetic analysis, there are three possible new genera in our collection. Miravalles and Las Lilas thermal springs are reservoirs of novel phylogeographic lineages of phototrophic microorganisms. This study is the first report of strains that belong to the genera Gloeocapsa, Stanieria, Microseira, Klisinema and Oculatella isolated from thermal springs and growing at temperatures above 50°C. We also obtained isolates assigned to Synechococcus, Leptolyngbya spp., and Fischerella, which are considered typical strains in these environments.
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Affiliation(s)
- Laura Brenes-Guillén
- Molecular and Biology Research Center, University of Costa Rica, San José, Costa Rica
| | | | - Saylen Morales
- Molecular and Biology Research Center, University of Costa Rica, San José, Costa Rica
| | - Marielos Mora-López
- Molecular and Biology Research Center, University of Costa Rica, San José, Costa Rica
| | - Ana Sittenfeld
- Molecular and Biology Research Center, University of Costa Rica, San José, Costa Rica
| | - Lorena Uribe-Lorío
- Molecular and Biology Research Center, University of Costa Rica, San José, Costa Rica
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28
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Rodriguez Jimenez A, Dechamps E, Giaux A, Goetghebuer L, Bauwens M, Willenz P, Flahaut S, Laport MS, George IF. The sponges Hymeniacidon perlevis and Halichondria panicea are reservoirs of antibiotic-producing bacteria against multi-drug resistant Staphylococcus aureus. J Appl Microbiol 2021; 131:706-718. [PMID: 33421270 DOI: 10.1111/jam.14999] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 01/04/2021] [Accepted: 01/06/2021] [Indexed: 12/12/2022]
Abstract
AIMS Evaluation of the antibacterial activity of cultivable bacteria associated with the marine sponges Hymeniacidon perlevis and Halichondria panicea against multi-drug-resistant Staphylococcus aureus. METHODS AND RESULTS One hundred and fourteen bacterial isolates were recovered from H. perlevis and H. panicea. Antibacterial action was demonstrated by 70% of the isolates against reference strain Staphylococcus aureus ATCC 29213 and by 31·6% against Pseudomonas aeruginosa ATCC 27853 in agar overlay assays. Antibacterial potential was further analysed against 36 multi-drug-resistant hospital Staphylococcus aureus strains with diverse resistance profiles. Among the 80 isolates positive against S. aureus ATCC 29213, 76·3% were active against at least one clinical S. aureus pathogen and 73·6% inhibited one or more methicillin-resistant (MRSA) and vancomycin non-susceptible S. aureus strains. In addition, 41·3% inhibited all vancomycin nonsusceptible MRSA strains. CONCLUSIONS Culturable bacteria associated to H. perlevis and H. panicea are promising sources of antibacterial compounds of great pharmaceutical interest. SIGNIFICANCE AND IMPACT OF THE STUDY This study was the first to explore the antibacterial potential of culturable bacteria associated with the marine sponges H. perlevis and H. panicea against MDR bacteria. This is the first report of antibacterial activity by Aquimarina, Denitrobaculum, Maribacter and Vagococcus isolates against MDR S. aureus strains, including vancomycin nonsusceptible and methicillin-resistant ones, against which new antibiotics are urgently needed.
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Affiliation(s)
- A Rodriguez Jimenez
- Ecology of Aquatic Systems, Université Libre de Bruxelles, Bruxelles, Belgique.,Ecological and Evolutionary Genomics, Université Libre de Bruxelles, Bruxelles, Belgique
| | - E Dechamps
- Ecology of Aquatic Systems, Université Libre de Bruxelles, Bruxelles, Belgique
| | - A Giaux
- Ecology of Aquatic Systems, Université Libre de Bruxelles, Bruxelles, Belgique
| | - L Goetghebuer
- Marine Biology, Université Libre de Bruxelles, Bruxelles, Belgique
| | - M Bauwens
- Marine Biology, Université Libre de Bruxelles, Bruxelles, Belgique
| | - P Willenz
- Marine Biology, Université Libre de Bruxelles, Bruxelles, Belgique.,Taxonomy & Phylogeny, Royal Belgian Institute of Natural Sciences, Bruxelles, Belgique
| | - S Flahaut
- Applied Microbiology, Université Libre de Bruxelles, Bruxelles, Belgique
| | - M S Laport
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - I F George
- Ecology of Aquatic Systems, Université Libre de Bruxelles, Bruxelles, Belgique.,Marine Biology, Université Libre de Bruxelles, Bruxelles, Belgique
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29
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Prieto I, Klimm A, Roldán F, Vetter W, Arbeli Z. Evidence for cometabolic transformation of weathered toxaphene under aerobic conditions using camphor as a co-substrate. J Appl Microbiol 2020; 131:221-235. [PMID: 33305511 DOI: 10.1111/jam.14963] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 11/29/2020] [Accepted: 12/04/2020] [Indexed: 11/30/2022]
Abstract
AIMS Toxaphene is a persistent organic pollutant, composed of approximately 1000 highly chlorinated bicyclic terpenes. The purpose of this study was to evaluate if camphor, a structural analogue of toxaphene, could stimulate aerobic biotransformation of weathered toxaphene. METHODS AND RESULTS Two enrichment cultures that degrade camphor as the sole carbon source were established from contaminated soil and biosolids. These cultures were used to evaluate aerobic transformation of weathered toxaphene. Only the biosolids culture could transform compounds of technical toxaphene (CTTs) in the presence of camphor, while no transformation was observed in the presence of glucose or with toxaphene as a sole carbon source. The transformed toxaphene had lower concentration of CTTs with longer retention times, and higher concentration of compounds with lower retention times. Gas chromatography with electron capture negative ion mass spectrometry (GC/ECNI-MS) showed that aerobic biotransformation mainly occurred with Cl8 - and Cl9 -CTTs compounds. The patterns of Cl6 - and Cl7 -CTTs were also simplified albeit to a much lesser extent. Seven camphor-degrading bacteria were isolated from the enrichment culture but none of them could degrade toxaphene. CONCLUSION Camphor degrading culture can aerobically transform CCTs via reductive pathway probably by co-metabolism using camphor as a co-substrate. SIGNIFICANCE AND IMPACT OF THE STUDY Since camphor is naturally produced by different plants, this study suggests that stimulation of aerobic transformation of toxaphene may occur in nature. Moreover plants, which produce camphor or similar compounds, might be used in bioremediation of contaminated soils.
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Affiliation(s)
- I Prieto
- Departamento de Biología, Facultad de Ciencias, Unidad de Saneamiento y Biotecnología Ambiental (USBA), Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
| | - A Klimm
- Institute of Food Chemistry, University of Hohenheim, Stuttgart, Germany
| | - F Roldán
- Departamento de Biología, Facultad de Ciencias, Unidad de Saneamiento y Biotecnología Ambiental (USBA), Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
| | - W Vetter
- Institute of Food Chemistry, University of Hohenheim, Stuttgart, Germany
| | - Z Arbeli
- Departamento de Biología, Facultad de Ciencias, Unidad de Saneamiento y Biotecnología Ambiental (USBA), Pontificia Universidad Javeriana, Bogotá, D.C., Colombia
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30
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Brun A, Nuzzo A, Prouvost B, Diallo D, Hamdan S, Meseguer E, Guidoux C, Lavallée P, Amarenco P, Lesèche G, Bouchard P, Michel JB, Rangé H. Oral microbiota and atherothrombotic carotid plaque vulnerability in periodontitis patients. A cross-sectional study. J Periodontal Res 2020; 56:339-350. [PMID: 33368263 DOI: 10.1111/jre.12826] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 09/13/2020] [Accepted: 11/23/2020] [Indexed: 12/21/2022]
Abstract
BACKGROUND An increased risk of atherothrombotic vascular events has been reported in periodontitis patients. Periodontitis is associated with dysbiotic subgingival biofilms and bacteremia. OBJECTIVE We hypothesized (a) that the oral microbiome is associated with the carotid microbiome and (b) that periodontitis could contribute to plaque vulnerability. The aim of this study was to determine the associations between periodontitis, the carotid microbiome, and the local innate immune response in carotid atherothrombotic plaques vulnerable to rupture. METHODS In this cross-sectional study, 45 patients admitted for carotid endarterectomy underwent a preoperative periodontal examination. The volume of intraplaque hemorrhage reflected by the hemoglobin level released in carotid-conditioned media was considered as a criterion of carotid plaque vulnerability. Levels of antibodies against periodontal bacteria were determined in sera. The signature of the oral microbiota was assessed by microbial whole-genome sequencing, nested PCR, and immunostaining in carotid plaque samples. Markers of neutrophil recruitment (leukotriene B4), neutrophil activation (myeloperoxidase, defensins), and cytokines were measured in carotid-conditioned media and/or plasma. RESULTS All patients exhibited periodontitis. One hundred and forty-four bacterial genera were detected in the carotid microbiome. While Streptococcus was found in 84% of the carotid samples, periodontitis-associated genera were detected in 21%. P. gingivalis DNA and gingipains were also identified in carotid samples. There were significant inverse correlations between periodontal attachment loss/serum anti-P. gingivalis Immunoglobulin A and cytokine inhibiting neutrophils (all P < .01). There were also significant positive correlations between lipopolysaccharides, myeloperoxidase/human neutrophil peptides1-3, and hemoglobin levels (all P < .01). CONCLUSIONS In patients at risk of stroke, the carotid plaque microbiome was highly diverse and compatible with an oral origin. Periodontitis was significantly associated with neutrophil activation markers and plaque vulnerability to rupture.
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Affiliation(s)
- Adrian Brun
- Department of Periodontology, Faculty of Dental Surgery Montrouge, Université de Paris, Montrouge, France.,Division of Periodontology, Department of Oral Medicine, AP-HP, Henri Mondor Hospital, Créteil, France.,Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France
| | - Alexandre Nuzzo
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France.,Department of Gastroenterology, Faculty of Medicine Xavier Bichat-Beaujon, Université de Paris, Clichy, France.,IBD and Intestinal Failure Unit, Department of Gastroenterology, APHP, Beaujon Hospital, Paris, France
| | - Bastien Prouvost
- Department of Periodontology, Faculty of Odontology Garancière, Université de Paris, Paris, France
| | - Devy Diallo
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France
| | - Sandrella Hamdan
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France
| | - Elena Meseguer
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France.,Department of Neurology, Faculty of Medicine Xavier Bichat, Université de Paris, Paris, France.,Department of Neurology and Stroke Centre, APHP, Bichat Hospital, Paris, France
| | - Céline Guidoux
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France.,Department of Neurology, Faculty of Medicine Xavier Bichat, Université de Paris, Paris, France.,Department of Neurology and Stroke Centre, APHP, Bichat Hospital, Paris, France
| | - Philippa Lavallée
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France.,Department of Neurology, Faculty of Medicine Xavier Bichat, Université de Paris, Paris, France.,Department of Neurology and Stroke Centre, APHP, Bichat Hospital, Paris, France
| | - Pierre Amarenco
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France.,Department of Neurology, Faculty of Medicine Xavier Bichat, Université de Paris, Paris, France.,Department of Neurology and Stroke Centre, APHP, Bichat Hospital, Paris, France
| | - Guy Lesèche
- Laboratory for Vascular Translational Science, Inserm UMRS 1148, Paris, France.,Department of Vascular Surgery, Faculty of Medicine Xavier Bichat, Université de Paris, Paris, France.,Department of Vascular Surgery, APHP, Bichat Hospital, Paris, France
| | - Philippe Bouchard
- Department of Periodontology, Faculty of Odontology Garancière, Université de Paris, Paris, France.,Division of Periodontology, Department of Odontology, APHP, Rothschild Hospital, Paris, France.,Orofacial Pathologies, Imaging and Biotherapies laboratory, UR2496, Université de Paris, Montrouge, France
| | | | - Hélène Rangé
- Department of Periodontology, Faculty of Odontology Garancière, Université de Paris, Paris, France.,Division of Periodontology, Department of Odontology, APHP, Rothschild Hospital, Paris, France.,Orofacial Pathologies, Imaging and Biotherapies laboratory, UR2496, Université de Paris, Montrouge, France
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Paniagua Voirol LR, Valsamakis G, Yu M, Johnston PR, Hilker M. How the 'kitome' influences the characterization of bacterial communities in lepidopteran samples with low bacterial biomass. J Appl Microbiol 2020; 130:1780-1793. [PMID: 33128818 DOI: 10.1111/jam.14919] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/02/2020] [Accepted: 10/23/2020] [Indexed: 12/26/2022]
Abstract
AIMS We aimed to elucidate whether the DNA extraction kit and bacteria therein affect the characterization of bacterial communities associated with butterfly samples harbouring different bacterial abundancies. METHODS AND RESULTS We analysed bacteria associated with eggs of Pieris brassicae and with adults of this butterfly, which were either untreated or treated with antibiotics (ABs). Three DNA extraction kits were used. Regardless of the extraction kit used, PCR amplification of the bacterial 16S rRNA gene detected very low bacterial presence in eggs and AB-treated butterflies. In untreated butterflies, bacterial signal intensity varied according to the kit and primers used. Sequencing (MiSeq) of the bacterial communities in untreated and AB-treated butterflies revealed a low alpha diversity in untreated butterflies because of the dominance of few bacteria genera, which were detectable regardless of the kit. However, a significantly greater alpha diversity was found in AB-treated butterflies, evidencing a true bias of the results due to bacterial contaminants in the kit. CONCLUSIONS The so-called 'kitome' can impact the profiling of Lepidoptera-associated bacteria in samples with low bacterial biomass. SIGNIFICANCE AND IMPACT OF THE STUDY Our study highlights the necessity of method testing and analysis of negative controls when investigating Lepidoptera-associated bacterial communities.
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Affiliation(s)
- L R Paniagua Voirol
- Applied Zoology/Animal Ecology, Institute of Biology, Freie Universitaet Berlin, Berlin, Germany
| | - G Valsamakis
- Applied Zoology/Animal Ecology, Institute of Biology, Freie Universitaet Berlin, Berlin, Germany
| | - M Yu
- Applied Zoology/Animal Ecology, Institute of Biology, Freie Universitaet Berlin, Berlin, Germany
| | - P R Johnston
- Evolutionary Biology, Institute of Biology, Freie Universitaet Berlin, Berlin, Germany.,Berlin Center for Genomics in Biodiversity Research (BeGenDiv), Berlin, Germany.,Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - M Hilker
- Applied Zoology/Animal Ecology, Institute of Biology, Freie Universitaet Berlin, Berlin, Germany
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32
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Kim SJ, Howe C, Mitchell J, Choo J, Powers A, Oikonomopoulos A, Pothoulakis C, Hommes DW, Im E, Rhee SH. Autotaxin loss accelerates intestinal inflammation by suppressing TLR4-mediated immune responses. EMBO Rep 2020; 21:e49332. [PMID: 32875703 DOI: 10.15252/embr.201949332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 07/20/2020] [Accepted: 08/10/2020] [Indexed: 12/13/2022] Open
Abstract
Autotaxin (ATX) converts lysophosphatidylcholine and sphingosyl-phosphorylcholine into lysophosphatidic acid and sphingosine 1-phosphate, respectively. Despite the pivotal function of ATX in lipid metabolism, mechanisms by which ATX regulates immune and inflammatory disorders remain elusive. Here, using myeloid cell lineage-restricted Atx knockout mice, we show that Atx deficiency disrupts membrane microdomains and lipid rafts, resulting in the inhibition of Toll-like receptor 4 (TLR4) complex formation and the suppression of adaptor recruitment, thereby inhibiting TLR4-mediated responses in macrophages. Accordingly, TLR4-induced innate immune functions, including phagocytosis and iNOS expression, are attenuated in Atx-deficient macrophages. Consequently, Atx-/- mice exhibit a higher bacterial prevalence in the intestinal mucosa compared to controls. When combined with global Il10-/- mice, which show spontaneous colitis due to the translocation of luminal commensal microbes into the mucosa, myeloid cell lineage-restricted Atx knockout accelerates colitis development compared to control littermates. Collectively, our data reveal that Atx deficiency compromises innate immune responses, thereby promoting microbe-associated gut inflammation.
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Affiliation(s)
- Su Jin Kim
- Department of Biological Sciences, Oakland University, Rochester, MI, USA.,College of Pharmacy, Pusan National University, Busan, Korea
| | - Cody Howe
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Jonathon Mitchell
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Jieun Choo
- College of Pharmacy, Pusan National University, Busan, Korea
| | - Alexandra Powers
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Angelos Oikonomopoulos
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Charalabos Pothoulakis
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Daniel W Hommes
- Division of Digestive Diseases, David Geffen School of Medicine, University of California, Los Angeles, CA, USA
| | - Eunok Im
- College of Pharmacy, Pusan National University, Busan, Korea
| | - Sang Hoon Rhee
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
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33
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Lamin H, Alami S, Bouhnik O, Bennis M, Benkritly S, Abdelmoumen H, Bedmar EJ, Missbah-El Idrissi M. Identification of the endosymbionts from Sulla spinosissima growing in a lead mine tailings in Eastern Morocco as Mesorhizobium camelthorni sv. aridi. J Appl Microbiol 2020; 130:948-959. [PMID: 32866324 DOI: 10.1111/jam.14834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/18/2020] [Accepted: 08/23/2020] [Indexed: 02/06/2023]
Abstract
AIMS To identify the bacteria nodulating Sulla spinosissima growing profusely in a lead and zinc mine tailings in Eastern Morocco. METHODS AND RESULTS In all, 32 rhizobial cultures, isolated from root nodules of S. spinosissima growing in soils of the mining site, were tolerant to different heavy metals. The ERIC-polymerase chain reaction (PCR) fingerprinting analysis clustered the isolates into seven different groups, and the analysis of the 16S rRNA sequences of four selected representative strains, showed they were related to different species of the genus Mesorhizobium. The atpD, glnII and recA housekeeping genes analysis confirmed the affiliation of the four representative strains to Mesorhizobium camelthorni CCNWXJ40-4T , with similarity percentages varying from 96·30 to 98·30%. The sequences of the nifH gene had 97·33-97·78% similarities with that of M. camelthorni CCNWXJ40-4T ; however, the nodC phylogeny of the four strains diverged from the type and other reference strains of M. camelthorni and formed a separated cluster. The four strains nodulate also Astragalus gombiformis and A. armatus but did not nodulate A. boeticus, Vachellia gummifera, Prosopis chilensis, Cicer arietinum, Lens culinaris, Medicago truncatula, Lupinus luteus or Phaseolus vulgaris. CONCLUSIONS Based on similarities of the nodC symbiotic gene and differences in the host range, the strains isolated from S. spinosissima growing in soils of the Sidi Boubker mining site may form a different symbiovar within Mesorhizobium for which the name aridi is proposed. SIGNIFICANCE AND IMPACT OF THE STUDY In this work, we show that strains of M. camelthorni species nodulating S. spinosissima in the arid area of Eastern Morocco constitute a distinct phylogenetic clade of nodulation genes; we named symbiovar aridi, which encompasses also mesorhizobia from other Mediterranean desert legumes.
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Affiliation(s)
- H Lamin
- Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - S Alami
- Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - O Bouhnik
- Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - M Bennis
- Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - S Benkritly
- Laboratoire de Biotechnologie des Rhizobiums et Amélioration des Plantes (LBRAP), Département de Biotechnologie, Faculté des Sciences, Université d'Oran1 Ahmed Ben Bella, Es Senia, Algeria
| | - H Abdelmoumen
- Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - E J Bedmar
- Department of Soil Microbiology and Symbiotic Systems, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
| | - M Missbah-El Idrissi
- Centre de Biotechnologies végétales et microbiennes, Biodiversité et Environnement, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
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Mehainaoui A, Menasria T, Benouagueni S, Benhadj M, Lalaoui R, Gacemi-Kirane D. Rapid screening and characterization of bacteria associated with hospital cockroaches (Blattella germanica L.) using MALDI-TOF mass spectrometry. J Appl Microbiol 2020; 130:960-970. [PMID: 32737936 DOI: 10.1111/jam.14803] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/09/2020] [Accepted: 07/22/2020] [Indexed: 11/29/2022]
Abstract
AIMS The study aimed to explore the diversity of culturable microbiota colonizing the alimentary tract and outer surfaces of German cockroaches (Blattella germanica) captured in a health care facility. METHODS AND RESULTS Microbial identification was conducted using Matrix Assisted Laser Desorption-Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) Biotyper and 16S rRNA sequencing. A total of 181 bacteria strains were isolated from 25 cockroach specimens and the MALDI-TOF MS-based assay yielded direct identification of 96·5% (175 out of 181) of the strains at the species level. The proteomic fingerprinting mainly revealed strains belonged to Gram-negative Enterobacteria (103) with six different genera that were characterized including Citrobacter, Klebsiella, Kluyevera, Leclercia, Morganella and Serratia. In addition, Pseudomonas sp. strains ranked in second with 29·8% (54 strains) followed by Staphylococcus sp. (6·62%) and Enterococcus sp. (1·65%). A large number of these bacteria (n = 90, 49·72%) was found in cockroaches captured in the maternity ward, whereas 45 strains (24·8%) were recovered in the paediatric ward. Altogether, 24 bacterial species were identified from both the external surface and digestive tract of the insect, of which Serratia marcescens presented the major group (n = 80, 44·19%) followed by Pseudomonas aeruginosa (n = 53, 29·28%) and Klebsiella oxytoca (n = 9, 4·94%). CONCLUSION The findings showed a high prevalence of bacterial pathogens harboured in the body and alimentary tract of B. germanica captured in a health care facility. SIGNIFICANCE AND IMPACT OF THE STUDY This investigation shows the possible role of German cockroaches as a source for bacterial pathogens, increasing the likelihood of direct transmission of healthcare associated infections, and thereby representing a public health risk. In addition, the present study revealed a high discriminatory power of the mass spectra investigation and a competent bacterial typing tool that extends phenotypic and genotypic approaches, which allows new possibilities for fast and accurate diagnosis in medical entomology.
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Affiliation(s)
- A Mehainaoui
- Department of Biochemistry, Faculty of Science, University Badji Mokhtar Annaba, Annaba, Algeria.,Laboratory of Genetic Improvement of Plants and Adaptation, Team of Water, Soil, and Microorganisms, Department of Biology, University Badji Mokhtar Annaba, Annaba, Algeria.,Faculté de Médecine et de Pharmacie, IRD, APHM, MEPHI, IHU Méditerranée Infection, Aix-Marseille University, Marseille, France
| | - T Menasria
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa, Algeria
| | - S Benouagueni
- Department of Biochemistry, Faculty of Science, University Badji Mokhtar Annaba, Annaba, Algeria
| | - M Benhadj
- Department of Applied Biology, Faculty of Exact Sciences and Natural and Life Sciences, University of Tebessa, Tebessa, Algeria
| | - R Lalaoui
- Faculté de Médecine et de Pharmacie, IRD, APHM, MEPHI, IHU Méditerranée Infection, Aix-Marseille University, Marseille, France
| | - D Gacemi-Kirane
- Department of Biochemistry, Faculty of Science, University Badji Mokhtar Annaba, Annaba, Algeria.,Laboratory of Genetic Improvement of Plants and Adaptation, Team of Water, Soil, and Microorganisms, Department of Biology, University Badji Mokhtar Annaba, Annaba, Algeria
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35
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Jiménez-Vázquez KR, García-Cárdenas E, Barrera-Ortiz S, Ortiz-Castro R, Ruiz-Herrera LF, Ramos-Acosta BP, Coria-Arellano JL, Sáenz-Mata J, López-Bucio J. The plant beneficial rhizobacterium Achromobacter sp. 5B1 influences root development through auxin signaling and redistribution. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 103:1639-1654. [PMID: 32445404 DOI: 10.1111/tpj.14853] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/10/2020] [Accepted: 05/15/2020] [Indexed: 05/20/2023]
Abstract
Roots provide physical and nutritional support to plant organs that are above ground and play critical roles for adaptation via intricate movements and growth patterns. Through screening the effects of bacterial isolates from roots of halophyte Mesquite (Prosopis sp.) on Arabidopsis thaliana, we identified Achromobacter sp. 5B1 as a probiotic bacterium that influences plant functional traits. Detailed genetic and architectural analyses in Arabidopsis grown in vitro and in soil, cell division measurements, auxin transport and response gene expression and brefeldin A treatments demonstrated that root colonization with Achromobacter sp. 5B1 changes the growth and branching patterns of roots, which were related to auxin perception and redistribution. Expression analysis of auxin transport and signaling revealed a redistribution of auxin within the primary root tip of wild-type seedlings by Achromobacter sp. 5B1 that is disrupted by brefeldin A and correlates with repression of auxin transporters PIN1 and PIN7 in root provasculature, and PIN2 in the epidermis and cortex of the root tip, whereas expression of PIN3 was enhanced in the columella. In seedlings harboring AUX1, EIR1, AXR1, ARF7ARF19, TIR1AFB2AFB3 single, double or triple loss-of-function mutations, or in a dominant (gain-of-function) mutant of SLR1, the bacterium caused primary roots to form supercoils that are devoid of lateral roots. The changes in growth and root architecture elicited by the bacterium helped Arabidopsis seedlings to resist salt stress better. Thus, Achromobacter sp. 5B1 fine tunes both root movements and the auxin response, which may be important for plant growth and environmental adaptation.
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Affiliation(s)
- Kirán R Jiménez-Vázquez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, Morelia, Michoacán, C. P. 58030, México
| | - Elizabeth García-Cárdenas
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, Morelia, Michoacán, C. P. 58030, México
| | - Salvador Barrera-Ortiz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, Morelia, Michoacán, C. P. 58030, México
| | - Randy Ortiz-Castro
- Red de Estudios Moleculares Avanzados, Instituto de Ecología A. C., Carretera Antigua a Coatepec 351 El Haya, Xalapa, Veracruz, 91070, México
| | - León F Ruiz-Herrera
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, Morelia, Michoacán, C. P. 58030, México
| | - Blanca P Ramos-Acosta
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Av. Universidad S/N, Frac. Filadelfia, Gómez Palacio, Durango, C.P. 35010, México
| | - Jessica L Coria-Arellano
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Av. Universidad S/N, Frac. Filadelfia, Gómez Palacio, Durango, C.P. 35010, México
| | - Jorge Sáenz-Mata
- Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Av. Universidad S/N, Frac. Filadelfia, Gómez Palacio, Durango, C.P. 35010, México
| | - José López-Bucio
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio B3, Ciudad Universitaria, Morelia, Michoacán, C. P. 58030, México
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36
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Nho SW, Kim M, Kweon O, Kim SJ, Moon MS, Periz G, Huang MCJ, Dewan K, Sadrieh NK, Cerniglia CE. Microbial contamination of tattoo and permanent makeup inks marketed in the US: a follow-up study. Lett Appl Microbiol 2020; 71:351-358. [PMID: 32654157 DOI: 10.1111/lam.13353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 06/29/2020] [Accepted: 07/05/2020] [Indexed: 11/28/2022]
Abstract
In a 2018 survey, U.S. Food and Drug Administration (FDA) identified microbial contamination in 42 (49%) of 85 unopened tattoo and permanent makeup (PMU) inks purchased from 13 manufacturers in the US between November 2015 and April 2016. To confirm the results of our previous survey, we evaluated the level of microbial contamination in an additional 27 samples from 10 manufacturers from September 2017 to December 2017, including 21 unopened tattoo and PMU inks which were selected based on our previous survey results and 6 ink diluents that were not previously analysed. Aerobic plate count and enrichment culture methods from the FDA's Bacteriological Analytical Manual revealed 11 (52%) out of 21 inks, from six manufacturers, were contaminated with micro-organisms, with contamination levels up to 3·6 × 108 CFU per gram, consistent with our previous survey results. We identified 25 bacterial strains belonging to nine genera and 19 species. Strains of Bacillus sp. (11 strains, 44%) were dominant, followed by Paenibacillus sp. (5 strains, 20%). Clinically relevant strains, such as Kocuria rhizophila and Oligella ureolytica, were also identified, as similar to the findings in our previous survey. No microbial contamination was detected in any of the six ink diluents.
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Affiliation(s)
- S W Nho
- Division of Microbiology, National Center for Toxicological Research, U.S. FDA, Jefferson, AK, USA
| | - M Kim
- Division of Microbiology, National Center for Toxicological Research, U.S. FDA, Jefferson, AK, USA
| | - O Kweon
- Division of Microbiology, National Center for Toxicological Research, U.S. FDA, Jefferson, AK, USA
| | - S-J Kim
- Division of Microbiology, National Center for Toxicological Research, U.S. FDA, Jefferson, AK, USA
| | - M S Moon
- Office of Cosmetics and Colors, Center for Food Safety and Applied Nutrition, U.S. FDA, College Park, MD, USA
| | - G Periz
- Office of Cosmetics and Colors, Center for Food Safety and Applied Nutrition, U.S. FDA, College Park, MD, USA
| | - M-C J Huang
- Office of Cosmetics and Colors, Center for Food Safety and Applied Nutrition, U.S. FDA, College Park, MD, USA
| | - K Dewan
- Office of Cosmetics and Colors, Center for Food Safety and Applied Nutrition, U.S. FDA, College Park, MD, USA
| | - N K Sadrieh
- Office of Cosmetics and Colors, Center for Food Safety and Applied Nutrition, U.S. FDA, College Park, MD, USA
| | - C E Cerniglia
- Division of Microbiology, National Center for Toxicological Research, U.S. FDA, Jefferson, AK, USA
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37
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Dittami SM, Peters AF, West JA, Cariou T, KleinJan H, Burgunter-Delamare B, Prechoux A, Egan S, Boyen C. Revisiting Australian Ectocarpus subulatus (Phaeophyceae) From the Hopkins River: Distribution, Abiotic Environment, and Associated Microbiota. JOURNAL OF PHYCOLOGY 2020; 56:719-729. [PMID: 31965565 DOI: 10.1111/jpy.12970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 01/07/2020] [Indexed: 05/24/2023]
Abstract
In 1995 a strain of Ectocarpus was isolated from Hopkins River Falls, Victoria, Australia, constituting one of few available freshwater or nearly freshwater brown algae, and the only one belonging to the genus Ectocarpus. It has since been used as a model to study acclimation and adaptation to low salinities and the role of its microbiota in these processes. To provide more background information on this model, we assessed if Ectocarpus was still present in the Hopkins river 22 years after the original finding, estimated its present distribution, described its abiotic environment, and determined its in situ microbial composition. We sampled for Ectocarpus at 15 sites along the Hopkins River as well as 10 neighboring sites and found individuals with ITS and cox1 sequences identical to the original isolate at three sites upstream of Hopkins River Falls. The salinity of the water at these sites ranged from 3.1 to 6.9, and it was rich in sulfate (1-5 mM). The diversity of bacteria associated with the algae in situ (1312 operational taxonomic units) was one order of magnitude higher than in previous studies of the original laboratory culture, and 95 alga-associated bacterial strains were isolated from algal filaments on site. In particular, species of Planctomycetes were abundant in situ but rare in laboratory cultures. Our results confirmed that Ectocarpus was still present in the Hopkins River, and the newly isolated algal and bacterial strains offer new possibilities to study the adaptation of Ectocarpus to low salinity and its interactions with its microbiome.
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Affiliation(s)
- Simon M Dittami
- CNRS, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Sorbonne Université, 29680, Roscoff, France
| | - Akira F Peters
- Bezhin Rosko, 40 Rue des Pêcheurs, 29250, Santec, France
| | - John A West
- Biosciences 2, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Thierry Cariou
- CNRS, FR2424, Station Biologique de Roscoff, Sorbonne Université, 29680, Roscoff, France
| | - Hetty KleinJan
- CNRS, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Sorbonne Université, 29680, Roscoff, France
| | - Bertille Burgunter-Delamare
- CNRS, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Sorbonne Université, 29680, Roscoff, France
| | - Aurélie Prechoux
- CNRS, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Sorbonne Université, 29680, Roscoff, France
| | - Suhelen Egan
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, Australia
| | - Catherine Boyen
- CNRS, Integrative Biology of Marine Models (LBI2M), Station Biologique de Roscoff, Sorbonne Université, 29680, Roscoff, France
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38
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Johnke J, Dirksen P, Schulenburg H. Community assembly of the native C. elegans microbiome is influenced by time, substrate and individual bacterial taxa. Environ Microbiol 2020; 22:1265-1279. [PMID: 32003074 DOI: 10.1111/1462-2920.14932] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 01/17/2020] [Accepted: 01/27/2020] [Indexed: 12/18/2022]
Abstract
Microbiome communities are complex assemblages of bacteria. The dissection of their assembly dynamics is challenging because it requires repeated sampling of both host and source communities. We used the nematode Caenorhabditis elegans as a model to study these dynamics. We characterized microbiome variation from natural worm populations and their substrates for two consecutive years using 16S rDNA amplicon sequencing. We found conservation in microbiome composition across time at the genus, but not amplicon sequencing variant (ASV) level. Only three ASVs were consistently present across worm samples (Comamonas ASV10859, Pseudomonas ASV7162 and Cellvibrio ASV9073). ASVs were more diverse in worms from different rather than the same substrates, indicating an influence of the source community on microbiome assembly. Surprisingly, almost 50% of worm-associated ASVs were absent in corresponding substrates, potentially due to environmental filtering. Ecological network analysis revealed strong effects of bacteria-bacteria interactions on community composition: While a dominant Erwinia strain correlated with decreased alpha-diversity, predatory bacteria of the Bdellovibrio and like organisms associated with increased alpha-diversity. High alpha-diversity was further linked to high worm population growth, especially on species-poor substrates. Our results highlight that microbiomes are individually shaped and sensitive to dramatic community shifts in response to particular competitive species.
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Affiliation(s)
- Julia Johnke
- Evolutionary Ecology and Genetics, Zoological Institute, University of Kiel, Kiel, Germany
| | - Philipp Dirksen
- Evolutionary Ecology and Genetics, Zoological Institute, University of Kiel, Kiel, Germany.,Max-Planck Institute for Evolutionary Biology, Plön, Germany
| | - Hinrich Schulenburg
- Evolutionary Ecology and Genetics, Zoological Institute, University of Kiel, Kiel, Germany.,Max-Planck Institute for Evolutionary Biology, Plön, Germany
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39
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Wang HL, Lei T, Wang XW, Maruthi MN, Zhu DT, Cameron SL, Rao Q, Shan HW, Colvin J, Liu YQ, Liu SS. A newly recorded Rickettsia of the Torix group is a recent intruder and an endosymbiont in the whitefly Bemisia tabaci. Environ Microbiol 2020; 22:1207-1221. [PMID: 31997547 DOI: 10.1111/1462-2920.14927] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/11/2020] [Accepted: 01/23/2020] [Indexed: 11/30/2022]
Abstract
The bacterium Rickettsia is found widely in phytophagous insects and often exerts profound effects on the phenotype and fitness of its hosts. Here, we decrypt a new, independent, phylogenetically ancient Torix Rickettsia endosymbiont found constantly in a laboratory line of an economically important insect Asia II 7, a putative species of the Bemisia tabaci whitefly complex (Hemiptera: Aleyrodidae), and occasionally in field whitefly populations. This new Rickettsia distributes throughout the body of its whitefly host. Genetically, compared to Rickettsia_bellii_MEAM1 found earlier in whiteflies, the new Rickettsia species has more gene families and pathways, which may be important factors in shaping specific symbiotic relationships. We propose the name 'Candidatus Rickettsia_Torix_Bemisia_tabaci (RiTBt)' for this new endosymbiont associated with whiteflies. Comparative genomic analyses indicate that RiTBi may be a relatively recent intruder in whiteflies given its low abundance in the field and relatively larger genome compared to Rickettsia_bellii_MEAM1.
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Affiliation(s)
- Hua-Ling Wang
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China.,Natural Resources Institute, University of Greenwich, Kent, ME4 4TB, UK
| | - Teng Lei
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Xiao-Wei Wang
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - M N Maruthi
- Natural Resources Institute, University of Greenwich, Kent, ME4 4TB, UK
| | - Dan-Tong Zhu
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Stephen L Cameron
- Department of Entomology, Purdue University, 901 West State Street, West Lafayette, IN, 479074, USA
| | - Qiong Rao
- School of Agriculture and Food Science, Zhejiang A & F University, Lin'an, 311300, Zhejiang, China
| | - Hong-Wei Shan
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - John Colvin
- Natural Resources Institute, University of Greenwich, Kent, ME4 4TB, UK
| | - Yin-Quan Liu
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Shu-Sheng Liu
- The Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects, Institute of Insect Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
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Martins TP, Ramos V, Hentschke GS, Castelo-Branco R, Rego A, Monteiro M, Brito Â, Tamagnini P, Cary SC, Vasconcelos V, Krienitz L, Magalhães C, Leão PN. The Extremophile Endolithella mcmurdoensis gen. et sp. nov. (Trebouxiophyceae, Chlorellaceae), A New Chlorella-like Endolithic Alga From Antarctica. JOURNAL OF PHYCOLOGY 2020; 56:208-216. [PMID: 31643075 DOI: 10.1111/jpy.12940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 09/20/2019] [Indexed: 06/10/2023]
Abstract
The McMurdo Dry Valleys constitute the largest ice-free region of Antarctica and one of the most extreme deserts on Earth. Despite the low temperatures, dry and poor soils and katabatic winds, some microbes are able to take advantage of endolithic microenvironments, inhabiting the pore spaces of soil and constituting photosynthesis-based communities. We isolated a green microalga, Endolithella mcmurdoensis gen. et sp. nov, from an endolithic sandstone sample collected in the McMurdo Dry Valleys (Victoria Land, East Antarctica) during the K020 expedition, in January 2013. The single non-axenic isolate (E. mcmurdoensis LEGE Z-009) exhibits cup-shaped chloroplasts, electron-dense bodies, and polyphosphate granules but our analysis did not reveal any diagnostic morphological characters. On the basis of phylogenetic analysis of the 18S rRNA (SSU) gene, the isolate was found to represent a new genus within the family Chlorellaceae.
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Affiliation(s)
- Teresa P Martins
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Vitor Ramos
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Guilherme S Hentschke
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Raquel Castelo-Branco
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Adriana Rego
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
| | - Maria Monteiro
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
- School of Science, University of Waikato, Hamilton, New Zealand
| | - Ângela Brito
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
| | - Paula Tamagnini
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
- Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135, Porto, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - S Craig Cary
- School of Science, University of Waikato, Hamilton, New Zealand
- International Centre for Terrestrial Antarctic Research, University of Waikato, Hamilton, New Zealand
| | - Vitor Vasconcelos
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - Lothar Krienitz
- Department of Experimental Limnology, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, D-16775, Stechlin, Germany
| | - Catarina Magalhães
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal
| | - Pedro N Leão
- Centro Interdisciplinar de Investigação Marinha e Ambiental, Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, 4450-208, Matosinhos, Portugal
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Wang GF, Meng JF, Tian T, Xiao XQ, Zhang B, Xiao YN. Endophytic Bacillus velezensis strain B-36 is a potential biocontrol agent against lotus rot caused by Fusarium oxysporum. J Appl Microbiol 2019; 128:1153-1162. [PMID: 31808212 PMCID: PMC7079251 DOI: 10.1111/jam.14542] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/02/2019] [Accepted: 12/03/2019] [Indexed: 01/16/2023]
Abstract
AIM The aim of this study was to screen potential lotus plant endophytic bacterial isolate for effective inhibition against lotus rot causing fungal pathogen Fusarium oxysporum. METHODS AND RESULTS In this study, endophytic bacteria were isolated from lotus tissues and tested for antagonistic activities against the pathogenic fungus F. oxysporum. Among the putative endophytic Bacillus strains identified, suspensions of the strain B-36 showed the highest inhibition rate against F. oxysporum growth. Pot assays indicated that B-36 was effective in controlling F. oxysporum-inducing lotus rot. However, the control efficiency varied with the inoculation method and concentration, where injection of 800 μl B-36 suspension per plant (2 × 108 CFU per ml) into stems showed the highest control efficiencies of 77·1 and 60·0% for pre-inoculation and post-inoculation. In addition, the colonizing population levels (CPLs) of B-36 on lotus also varied with the inoculation method and concentration, with the highest CPLs, that is, 3·05 and 2·83 log(CFU per gram), being observed on lotus leaves and stems respectively for stem injection of 200 μl per plant. Moreover B-36 showed no noticeable effects on lotus seed germination rate or seedling growth. Finally, B-36 was characterized as Bacillus velezensis based on its morphology, Gram-positive characteristics, as well as its 16S rDNA and gyrB sequences. CONCLUSION The isolate B-36 can be applied as a biocontrol agent against F. oxysporum-inducing lotus rot. SIGNIFICANCE OF IMPACT OF THE STUDY The soil-borne fungus F. oxysporum causes lotus rot and severe yield loss, and currently available control methods are very limited. Here we identify a new promising biocontrol agent against lotus rot caused by F. oxysporum.
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Affiliation(s)
- G F Wang
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - J F Meng
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - T Tian
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - X Q Xiao
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - B Zhang
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Y N Xiao
- College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, Hubei, China
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Missbah El Idrissi M, Lamin H, ElFaik S, Tortosa G, Peix A, Bedmar E, Abdelmoumen H. Microvirga
sp. symbiovar mediterranense nodulates
Lupinus cosentinii
grown wild in Morocco. J Appl Microbiol 2019; 128:1109-1118. [DOI: 10.1111/jam.14526] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 11/18/2019] [Accepted: 11/19/2019] [Indexed: 01/14/2023]
Affiliation(s)
- M. Missbah El Idrissi
- Centre de Biotechnologie Végétale et Microbienne Faculty of Sciences Mohammed V University Agdal, Rabat Morocco
| | - H. Lamin
- Centre de Biotechnologie Végétale et Microbienne Faculty of Sciences Mohammed V University Agdal, Rabat Morocco
| | - S. ElFaik
- Centre de Biotechnologie Végétale et Microbienne Faculty of Sciences Mohammed V University Agdal, Rabat Morocco
| | - G. Tortosa
- Department of Soil Microbiology and Symbiotic Systems Estación Experimental del Zaidín Consejo Superior de Investigaciones Científicas Granada Spain
| | - A. Peix
- Instituto de Recursos Naturales y Agrobiología IRNASA‐CSIC Salamanca Spain
| | - E.J. Bedmar
- Department of Soil Microbiology and Symbiotic Systems Estación Experimental del Zaidín Consejo Superior de Investigaciones Científicas Granada Spain
| | - H. Abdelmoumen
- Centre de Biotechnologie Végétale et Microbienne Faculty of Sciences Mohammed V University Agdal, Rabat Morocco
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Preena PG, Arathi D, Raj NS, Arun Kumar TV, Arun Raja S, Reshma RN, Raja Swaminathan T. Diversity of antimicrobial-resistant pathogens from a freshwater ornamental fish farm. Lett Appl Microbiol 2019; 71:108-116. [PMID: 31602688 DOI: 10.1111/lam.13231] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 10/04/2019] [Accepted: 10/06/2019] [Indexed: 12/01/2022]
Abstract
The indiscriminate use of antimicrobials in aquaculture results in antibiotic selection pressure and proliferation of antimicrobial resistant (AMR) bacteria. Frequent assessment of antimicrobial resistance in aquaculture environment is inevitable so as to reduce the passage of clinically important AMR from aquatic to other environment. The present study analysed the antimicrobial resistance of pathogens associated with diseased koi carp and goldfish from an ornamental fish farm. Phenotypic and genotypic characterization of the recovered isolates from both fishes revealed significant pathogens in aquaculture such as Aeromonas, Edwardsiella tarda, Acinetobacter, Lactococcus, Citrobacter, Enterobacter and Comamonas. Shannon-Wiener diversity of koi isolates (2·359) was found to be higher than that of goldfish (1·864). Antibiotic susceptibility testing using disc diffusion with 47 antibiotics revealed significant resistance pattern of Acinetobacter, Comamonas, Klebsiella and Enterobacter from goldfish and Edwardsiella, Aeromonas, Lactococcus, Enterobacter and Acinetobacter from koi with higher multiple antibiotic resistance indexes (>0·3). The minimum inhibitory concentration of antibiotics for the major resistant isolates was found to be very high with >256 μg. All the isolates were susceptible to amoxicillin, kanamycin, cefepime, cefexime, cefotaxime, ceftazidime, doripenem, ciprofloxacin and norfloxacin, recommending their successful application in the farm. SIGNIFICANCE AND IMPACT OF THE STUDY: Antimicrobial resistance is a major threat faced in aquaculture industry. The current study provides baseline information regarding the antibiotic resistance patterns of diverse pathogens recovered from ornamental koi carp and goldfish. The higher MAR index of pathogens and greater MIC of antibiotics for the resistant isolates highlighted the intense use of antibiotics in aquaculture farm. The potential of the pathogens to exhibit resistance even towards the new generation antibiotics remind the need of prudent use of antibiotics and continuous monitoring and surveillance programmes.
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Affiliation(s)
- P G Preena
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
| | - D Arathi
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
| | - N Sundar Raj
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
| | - T V Arun Kumar
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
| | - S Arun Raja
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
| | - R N Reshma
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
| | - T Raja Swaminathan
- Peninsular and Marine Fish Genetic Resources Centre of ICAR-NBFGR, Kochi, India
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44
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Glibota N, Grande Burgos MJ, Gálvez A, Ortega E. Copper tolerance and antibiotic resistance in soil bacteria from olive tree agricultural fields routinely treated with copper compounds. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:4677-4685. [PMID: 30906996 DOI: 10.1002/jsfa.9708] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 03/21/2019] [Accepted: 03/21/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Heavy metal pollution may act as persistent selective pressure that favors the spread of antimicrobial resistance in natural environments. The aim of this study was to isolate and identify metal-tolerant bacteria from soils in olive tree fields routinely treated with copper-derived compounds and to evaluate the tolerance of bacterial strains to other metals and their resistance to clinically relevant antibiotics. RESULTS Five hundred and ninety-five bacterial isolates from 45 olive tree agricultural fields were studied. Minimum inhibitory concentrations (MICs) ≥ 16 mmol L-1 were detected for copper (57% of isolates), zinc (37%) and lead (62%), while only 3% had MICs ≥ 12 mmol L-1 for nickel. Ninety-six metal-tolerant strains were selected for identification and antibiotic resistance determination. Most isolates belonged to the genera Pseudomonas (37%), Bacillus (23%) and Chryseobacterium (20%), while 6% were identified as Variovorax, 4% as Stenotrophomonas and 2% as Serratia or Burkholderia. Highest copper tolerance was detected among Pseudomonas. Over 75% of the strains with high copper tolerance were also resistant to vancomycin, 50% to ampicillin and 40% to erythromycin or trimethoprim/sulfamethoxazole. CONCLUSION Bacteria from olive soils are tolerant to metals, mainly copper, but also zinc and lead, as well as resistant to clinically important antibiotics, which could be a troublesome issue in clinical settings. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Nicolás Glibota
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain
| | - Mª José Grande Burgos
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain
| | - Antonio Gálvez
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain
| | - Elena Ortega
- Área de Microbiología, Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, Jaén, Spain
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Borah A, Das R, Mazumdar R, Thakur D. Culturable endophytic bacteria of Camellia species endowed with plant growth promoting characteristics. J Appl Microbiol 2019; 127:825-844. [PMID: 31216598 DOI: 10.1111/jam.14356] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 05/29/2019] [Accepted: 06/14/2019] [Indexed: 12/11/2022]
Abstract
AIM Tea (Camellia sinensis (L.) O. Kuntze) is an economically important caffeine-containing beverage crop with massive plantation in the Northeast corner of the agroclimatic belt of India. The main aim of the work was to isolate, identify and characterize the native plant growth promoting endophytes associated with tea for future microbe based bioformulation. METHODS AND RESULTS A total of 129 endophytic bacteria were isolated and characterized for plant growth promoting traits such as indole-3-acetic acid (IAA), phosphate solubilization, ammonia production, biocontrol traits like siderophore and extracellular enzyme production. BOX-PCR fingerprinting was used to differentiate the various bacterial isolates obtained from six different tea species. 16S rRNA sequencing and blast analysis showed that these isolates belonged to different genera, that is, Bacillus, Brevibacterium, Paenibacillus and Lysinibacillus. Lysinibacillus sp. S24 showed the highest phosphate solubilization and IAA acid production efficiency of 268·4 ± 14·3 and 13·5 ± 0·5 µg ml-1 , respectively. Brevibacterium sp. S91 showed the highest ammonia production of 6·2 ± 0·5 µmol ml-1 . Chitinase, cellulase, protease and pectinase activities were shown by 4·6, 34·1, 27·13 and 13·14% of the total isolates, respectively. Similarly, 41% of the total isolates were positive for 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity. Further, the potent PGP isolates, S24 and S91 were able to enhance the vegetative parameters such as dry/fresh weight of root and shoot of tea plants in nursery conditions. CONCLUSION Our findings corroborate that tea endophytic bacteria possess the potential to demonstrate multiple PGP traits both, in vivo and in vitro and have the potential for further large-scale trials. SIGNIFICANCE AND IMPACT OF THE STUDY The exploration of tea endophytic bacterial community is suitable for the development of bioformulations for an integrated nutrient management and thus sustainable crop production and decreasing the hazardous effects of chemical fertilizers on the environment and human health.
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Affiliation(s)
- A Borah
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India
| | - R Das
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India
| | - R Mazumdar
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India
| | - D Thakur
- Microbial Biotechnology Laboratory, Life Sciences Division, Institute of Advanced Study in Science and Technology, Guwahati, Assam, India
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Martijn J, Lind AE, Schön ME, Spiertz I, Juzokaite L, Bunikis I, Pettersson OV, Ettema TJG. Confident phylogenetic identification of uncultured prokaryotes through long read amplicon sequencing of the 16S-ITS-23S rRNA operon. Environ Microbiol 2019; 21:2485-2498. [PMID: 31012228 PMCID: PMC6849856 DOI: 10.1111/1462-2920.14636] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 04/16/2019] [Accepted: 04/18/2019] [Indexed: 11/30/2022]
Abstract
Amplicon sequencing of the 16S rRNA gene is the predominant method to quantify microbial compositions and to discover novel lineages. However, traditional short amplicons often do not contain enough information to confidently resolve their phylogeny. Here we present a cost-effective protocol that amplifies a large part of the rRNA operon and sequences the amplicons with PacBio technology. We tested our method on a mock community and developed a read-curation pipeline that reduces the overall read error rate to 0.18%. Applying our method on four environmental samples, we captured near full-length rRNA operon amplicons from a large diversity of prokaryotes. The method operated at moderately high-throughput (22286-37,850 raw ccs reads) and generated a large amount of putative novel archaeal 23S rRNA gene sequences compared to the archaeal SILVA database. These long amplicons allowed for higher resolution during taxonomic classification by means of long (∼1000 bp) 16S rRNA gene fragments and for substantially more confident phylogenies by means of combined near full-length 16S and 23S rRNA gene sequences, compared to shorter traditional amplicons (250 bp of the 16S rRNA gene). We recommend our method to those who wish to cost-effectively and confidently estimate the phylogenetic diversity of prokaryotes in environmental samples at high throughput.
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Affiliation(s)
- Joran Martijn
- Department of Cell and Molecular Biology, Science for Life LaboratoryUppsala UniversitySE‐75123, UppsalaSweden
| | - Anders E. Lind
- Department of Cell and Molecular Biology, Science for Life LaboratoryUppsala UniversitySE‐75123, UppsalaSweden
| | - Max E. Schön
- Department of Cell and Molecular Biology, Science for Life LaboratoryUppsala UniversitySE‐75123, UppsalaSweden
| | - Ian Spiertz
- Department of Cell and Molecular Biology, Science for Life LaboratoryUppsala UniversitySE‐75123, UppsalaSweden
| | - Lina Juzokaite
- Department of Cell and Molecular Biology, Science for Life LaboratoryUppsala UniversitySE‐75123, UppsalaSweden
| | - Ignas Bunikis
- Science for Life LaboratoryUppsala UniversitySE‐75185, UppsalaSweden
| | | | - Thijs J. G. Ettema
- Department of Cell and Molecular Biology, Science for Life LaboratoryUppsala UniversitySE‐75123, UppsalaSweden
- Laboratory of Microbiology, Department of Agrotechnology and Food SciencesWageningen UniversityStippeneng 4, 6708WE, WageningenThe Netherlands
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47
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Shakarami MH, Mohammadabadi T, Motamedi H, Sari M, Teimouri Yansari A. Isolation and identification of cellulolytic bacteria from gastrointestinal tract of Arabian horse and investigation of their effect on the nutritional value of wheat straw. J Appl Microbiol 2019; 127:344-353. [DOI: 10.1111/jam.14251] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/22/2019] [Accepted: 03/06/2019] [Indexed: 11/28/2022]
Affiliation(s)
- M. Harsini Shakarami
- Department of Animal Science Faculty of Animal Science and Food Technology Agricultural Sciences and Natural Resources University of Khuzestan Mollasani, Ahvaz Iran
| | - T. Mohammadabadi
- Department of Animal Science Faculty of Animal Science and Food Technology Agricultural Sciences and Natural Resources University of Khuzestan Mollasani, Ahvaz Iran
| | - H. Motamedi
- Department of Biology Faculty of Science Shahid Chamran University of Ahvaz Khuzestan Iran
- Biotechnology and Biological Science Research Center Shahid Chamran University of Ahvaz Khuzestan Iran
| | - M. Sari
- Department of Animal Science Faculty of Animal Science and Food Technology Agricultural Sciences and Natural Resources University of Khuzestan Mollasani, Ahvaz Iran
| | - A. Teimouri Yansari
- Department of Animal Science Faculty of Animal Science and Fisheries Sari Agricultural Sciences and Natural Resources University Sari Iran
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Shahid M, Javed M, Masood S, Akram M, Azeem M, Ali Q, Gilani R, Basit F, Abid A, Lindberg S. Serratiasp.CP‐13 augments the growth of cadmium (Cd)‐stressedLinum usitatissimumL. by limited Cd uptake, enhanced nutrient acquisition and antioxidative potential. J Appl Microbiol 2019; 126:1708-1721. [DOI: 10.1111/jam.14252] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 02/24/2019] [Accepted: 03/11/2019] [Indexed: 01/21/2023]
Affiliation(s)
- M. Shahid
- Department of Bioinformatics and Biotechnology Government College University Faisalabad Pakistan
| | - M.T. Javed
- Department of Botany Government College University Faisalabad Pakistan
| | - S. Masood
- Institute of Soil Science Chinese Academy of Sciences Nanjing China
| | - M.S. Akram
- Department of Botany Government College University Faisalabad Pakistan
| | - M. Azeem
- Department of Botany Government College University Faisalabad Pakistan
| | - Q. Ali
- Department of Botany Government College University Faisalabad Pakistan
| | - R. Gilani
- Department of Bioinformatics and Biotechnology Government College University Faisalabad Pakistan
- Department of Botany Government College University Faisalabad Pakistan
| | - F. Basit
- Department of Bioinformatics and Biotechnology Government College University Faisalabad Pakistan
| | - A. Abid
- Department of Botany Government College University Faisalabad Pakistan
| | - S. Lindberg
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
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49
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Louati I, Hadrich B, Nasri M, Belbahri L, Woodward S, Mechichi T. Modelling of Reactive Black 5 decolourization in the presence of heavy metals by the newly isolated
Pseudomonas aeruginosa
strain Gb30. J Appl Microbiol 2019; 126:1761-1771. [DOI: 10.1111/jam.14262] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 02/11/2019] [Accepted: 03/18/2019] [Indexed: 11/28/2022]
Affiliation(s)
- I. Louati
- Laboratory of Enzyme Engineering and Microbiology National School of Engineers of Sfax University of Sfax Sfax Tunisia
| | - B. Hadrich
- Unité de Biotechnologie des Algues Biological Engineering Department National School of Engineers of Sfax University of Sfax Sfax Tunisia
| | - M. Nasri
- Laboratory of Enzyme Engineering and Microbiology National School of Engineers of Sfax University of Sfax Sfax Tunisia
| | - L. Belbahri
- Laboratoire de biologie des sols Université de Neuchâtel Neuchâtel Switzerland
| | - S. Woodward
- School of Biological Sciences University of Aberdeen Aberdeen UK
| | - T. Mechichi
- Laboratory of Enzyme Engineering and Microbiology National School of Engineers of Sfax University of Sfax Sfax Tunisia
- Laboratory of Biochemistry and Enzymatic Engineering of Lipases National School of Engineers of Sfax University of Sfax Sfax Tunisia
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Zhou F, Wu X, Xu L, Guo S, Chen G, Zhang X. Repressed Beauveria bassiana infections in Delia antiqua due to associated microbiota. PEST MANAGEMENT SCIENCE 2019; 75:170-179. [PMID: 29797399 DOI: 10.1002/ps.5084] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 04/18/2018] [Accepted: 05/17/2018] [Indexed: 05/15/2023]
Abstract
BACKGROUND Insects form both mutualistic and antagonistic relationships with microbes, and some antagonistic microbes have been used as biocontrol agents (BCAs) in pest management. Contextually, BCAs may be inhibited by beneficial insect symbionts, which can become potential barriers to entomopathogen-dependent pest biocontrol. Using the symbioses formed by one devastating dipteran pest, Delia antiqua, and its associated microbes as a model system, we sought to determine whether the antagonistic interaction between BCAs and microbial symbionts could affect the outcome of entomopathogen-dependent pest biocontrol. RESULTS The result showed that in contrast to non-axenic D. antiqua larvae, i.e., onion maggots, axenic larvae lost resistance to the entomopathogenic Beauveria bassiana, and the re-inoculation of microbiota increased the resistance of axenic larvae to B. bassiana. Furthermore, bacteria frequently isolated from larvae, including Citrobacter freundii, Enterobacter ludwigii, Pseudomonas protegens, Serratia plymuthica, Sphingobacterium faecium and Stenotrophomonas maltophilia, suppressed B. bassiana conidia germination and hyphal growth, and the re-inoculation of specific individual bacteria enhanced the resistance of axenic larvae to B. bassiana. CONCLUSION Bacteria associated with larvae, including C. freundii, E. ludwigii, P. protegens, S. plymuthica, S. faecium and S. maltophilia, can inhibit B. bassiana infection. Removing the microbiota can suppress larval resistance to fungal infection. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Fangyuan Zhou
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Xiaoqing Wu
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Letian Xu
- Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, College of Life Science, Hubei University, Wuhan, China
| | - Shuhai Guo
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Guanhong Chen
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Xinjian Zhang
- Shandong Provincial Key Laboratory of Applied Microbiology, Ecology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
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