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Detection of microbial growth in aseptic food products using non-invasive Tunable Diode Laser Absorption Spectroscopy (TDLAS). Food Control 2023. [DOI: 10.1016/j.foodcont.2022.109452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Krusong W, La China S, Pothimon R, Gullo M. Defining Paenibacillus azoreducens (P8) and Acetobacter pasteurianus (UMCC 2951) strains performances in producing acetic acid. Front Microbiol 2022; 13:991688. [DOI: 10.3389/fmicb.2022.991688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Accepted: 10/19/2022] [Indexed: 11/18/2022] Open
Abstract
In this study, spore-forming bacteria isolated from saccharified rice were selected for producing acetic acid. From the screening of 15 strains, P8 strain was chosen as a candidate. The strain was identified as Paenibacillus azoreducens by 16S rRNA analysis (99.85% similarity with P. azoreducens CM1T). Acetic acid is the main component of vinegar but also an industrial commodity produced by chemical synthesis. Sustainable routes for obtaining acetic acid are of great interest for decreasing the environmental impact generated by chemical syntheses. Biological acetic acid production is effective for vinegar production by acetic acid bacteria, but it cannot economically compete with the chemical synthesis for producing it as a pure commodity. Considering the need to improve the yield of pure acetic acid produced by microbial conversions, in this study, P8 strain was chosen for designing processes in different fermentation conditions. Tests were conducted in single and semi-continuous systems, using rice wine as substrate. Acetic acid produced by P8 strain was compared with that of Acetobacter pasteurianus (UMCC 2951), a strain known for producing acetic acid from rice wine. Even though the fermentation performances of P. azoreducens P8 were slightly lower than those of acetic acid bacteria usually used for vinegar production, results highlight its suitability for producing acetic acid. The final acetic acid produced by P. azoreducens P8 was 73 g/L, in a single stage fermentation, without losses. In nine cycles of semi-continuous regime the average of acetification rate was 0.814 (g/L/days). Two main attributes of P. azoreducens P8 are of relevance for producing acetic acid, namely the ability to grow at temperature higher (+ 37°C), than mesophilic acetic acid bacteria, and the absence of cytoplasmic assimilation of acetic acid. These features allow to design multiple strains cultures, in which P. azoreducens can acts as a helper strain. Based on our results, the new isolate P. azoreducens P8 can be propagated in fermenting broths for boosting acetic acid production, under the selected conditions, and used in combination with acetic acid bacteria to produce biological acetic acid, as a non-food grade commodity.
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Gioia G, Freeman J, Sipka A, Santisteban C, Wieland M, Gallardo VA, Monistero V, Scott J, Moroni P. Pathogens associated with houseflies from different areas within a New York State dairy. JDS COMMUNICATIONS 2022; 3:285-290. [PMID: 36338025 PMCID: PMC9623797 DOI: 10.3168/jdsc.2021-0200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2021] [Accepted: 03/13/2022] [Indexed: 06/16/2023]
Abstract
Houseflies (Musca domestica) are nonbiting muscoids of importance because they can be mechanical vectors of many kinds of pathogens such as bacteria, protozoa, viruses, and helminth eggs. This study aimed to evaluate the bacterial communities associated with houseflies captured in 3 different areas on a dairy farm located in New York State. Variations in the bacterial community were also evaluated based on the flies' sex and external or internal location where the bacteria were isolated. A total of 101 flies were collected: 27 flies from the sick pen, 42 from calf hutches, and 32 from the milking parlor. A total of 485 organisms were isolated, 233 (48.0%) from 53 female flies and 252 (52.0%) from 48 male flies. Most (74%) bacteria were found in the internal parts of the flies, with only 26% isolated from the external surfaces. The number of isolates detected per fly ranged between 1 and 11. A total of 392 bacteria were identified at the species level. We isolated 26 species reported to be bovine contagious or environmental mastitis pathogens. Within the group of organisms considered contagious, we isolated Staphylococcus aureus and Mycoplasma arginini. This was the first time that a Mycoplasma species was isolated from houseflies. We identified 5 organisms considered foodborne pathogens that affect human health: Salmonella spp., Escherichia coli, Staph. aureus, Bacillus cereus, and Bacillus subtilis. Four of the organisms isolated in this study were also linked with milk spoilage, including Pseudomonas aeruginosa, Bacillus cereus, Bacillus licheniformis, and Paenibacillus lactis. This study confirmed that houseflies carry a high bacterial diversity, including organisms associated with animal infections, organisms that could be a concern for public health, or organisms that could negatively affect milk quality.
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Affiliation(s)
- G. Gioia
- Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, NY 14850
| | - J. Freeman
- Department of Entomology, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
| | - A. Sipka
- Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, NY 14850
| | - C. Santisteban
- Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, NY 14850
| | - M. Wieland
- Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, NY 14850
| | - V. Alanis Gallardo
- Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, NY 14850
- Departamento de Medicina Preventiva y Salud Pública, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad Universitaria, CDMX 04510, México
| | - V. Monistero
- Dipartimento di Medicina Veterinaria, Università degli Studi di Milano, Via dell'Università, 6, 26900 Lodi LO, Italy
| | - J.G. Scott
- Department of Entomology, College of Agriculture and Life Sciences, Cornell University, Ithaca, NY 14853
| | - P. Moroni
- Quality Milk Production Services, Animal Health Diagnostic Center, Cornell University, Ithaca, NY 14850
- Dipartimento di Medicina Veterinaria, Università degli Studi di Milano, Via dell'Università, 6, 26900 Lodi LO, Italy
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Design and efficiency evaluation of a mid-size serpentine Dean flow UV-C system for the processing of whole milk using computational fluid dynamics and biodosimetry. J FOOD ENG 2022. [DOI: 10.1016/j.jfoodeng.2022.111168] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Rush CE, Johnson J, Burroughs S, Riesgaard B, Torres A, Meunier-Goddik L, Waite-Cusic J. Evaluating Paenibacillus odorifer for its potential to reduce shelf life in reworked high-temperature, short-time fluid milk products. JDS COMMUNICATIONS 2022; 3:91-96. [PMID: 36339734 PMCID: PMC9623621 DOI: 10.3168/jdsc.2021-0168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 11/21/2021] [Indexed: 06/16/2023]
Abstract
Rework is a common practice used in the dairy industry as a strategy to help minimize waste from processing steps or errors that might otherwise render the product unsaleable. Dairy processors may rework their high-temperature, short-time (HTST) fluid milk products up to code date (21 d) at a typical dilution rate of ≤20% rework into ≥80% fresh raw milk. Bacterial spores present in raw milk that can survive pasteurization and grow at refrigeration temperatures are often responsible for milk spoilage. However, the potential impact of growth and thermal resistance of organisms in reworked product has not been investigated. Our objective was to characterize growth, sporulation, and thermal resistance of Paenibacillus odorifer under conditions representative of extreme storage conditions (time and temperature) of reduced fat (2%) and chocolate milk to evaluate whether product containing rework would have a reduced shelf life. Commercial UHT-pasteurized 2% milk and chocolate milk were independently inoculated with 4 strains of P. odorifer at 1 to 2 log cfu/mL and stored at 4°C and 7°C for 30 d. Changes in P. odorifer cell densities were determined by standard serial dilution with spread plating on tryptic soy agar with yeast extract and incubation at 25°C for 48 h. Spore counts were determined following thermal treatment at 80°C for 12 min. Thermal resistance of a cocktail of P. odorifer in milk was determined after treatments at 63°C for 30 min and 72°C for 15 s. Strains of P. odorifer grew rapidly at 7°C and reached a maximum cell density of ~8 log cfu/g in both 2% and chocolate milk within 12 d. All strains grew more slowly at 4°C and had not reached maximum cell density by 21 d. With extreme temperature abuse (25°C, 24 h), P. odorifer will sporulate in milk; however, thermally resistant subpopulations, including spores, did not develop in milk at 4°C until after stationary phase was achieved (>24 d). Vegetative cells of P. odorifer were verified to be sensitive to pasteurization (>7 log reduction); therefore, P. odorifer would not be expected to contribute to reduced shelf life of fluid milk products containing rework, even with extended storage before rework.
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Li HP, Gan YN, Yue LJ, Han QQ, Chen J, Liu QM, Zhao Q, Zhang JL. Newly Isolated Paenibacillus monticola sp. nov., a Novel Plant Growth-Promoting Rhizobacteria Strain From High-Altitude Spruce Forests in the Qilian Mountains, China. Front Microbiol 2022; 13:833313. [PMID: 35250949 PMCID: PMC8895201 DOI: 10.3389/fmicb.2022.833313] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 01/11/2022] [Indexed: 11/25/2022] Open
Abstract
Species in the genus Paenibacillus from special habitats have attracted great attention due to their plant growth-promoting traits. A novel plant growth-promoting rhizobacteria (PGPR) species in the genus Paenibacillus was isolated from spruce forest at the height of 3,150 m in the Qilian Mountains, Gansu province, China. The phylogenetic analysis based on 16S rRNA, rpoB, and nifH gene sequences demonstrated that strain LC-T2T was affiliated in the genus Paenibacillus and exhibited the highest sequence similarity with Paenibacillus donghaensis KCTC 13049T (97.4%). Average nucleotide identity (ANIb and ANIm) and digital DNA–DNA hybridization (dDDH) between strain LC-T2T and P. donghaensis KCTC 13049T were 72.6, 83.3, and 21.2%, respectively, indicating their genetic differences at the species level. These differences were further verified by polar lipids profiles, major fatty acid contents, and several distinct physiological characteristics. Meanwhile, the draft genome analysis provided insight into the genetic features to support its plant-associated lifestyle and habitat adaptation. Subsequently, the effects of volatile organic compound (VOC) emitted from strain LC-T2T on the growth of Arabidopsis were evaluated. Application of strain LC-T2T significantly improved root surface area, root projection area, and root fork numbers by 158.3, 158.3, and 241.2%, respectively, compared to control. Also, the effects of LC-T2T on the growth of white clover (Trifolium repens L.) were further assessed by pot experiment. Application of LC-T2T also significantly improved the growth of white clover with root fresh weight increased over three-folds compared to control. Furthermore, the viable bacterial genera of rhizosphere soil were detected in each treatment. The number of genera from LC-T2T-inoculated rhizosphere soil was 1.7-fold higher than that of control, and some isolates were similar to strain LC-T2T, indicating that LC-T2T inoculation was effective in the rhizosphere soil of white clover. Overall, strain LC-T2T should be attributed to a novel PGPR species within the genus Paenibacillus based on phylogenetic relatedness, genotypic features, and phenotypic and inoculation experiment, for which the name Paenibacillus monticola sp. nov. is proposed.
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Affiliation(s)
- Hui-Ping Li
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
| | - Ya-Nan Gan
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
| | - Li-Jun Yue
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
| | - Qing-Qing Han
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
| | - Jia Chen
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
| | - Qiong-Mei Liu
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
| | - Qi Zhao
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- *Correspondence: Qi Zhao,
| | - Jin-Lin Zhang
- Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, China
- Center for Grassland Microbiome, State Key Laboratory of Grassland Agro-Ecosystems, Lanzhou University, Lanzhou, China
- Jin-Lin Zhang,
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Comparison of Synergistic Effect of Nisin and Monolaurin on the Inactivation of Three Heat Resistant Spores Studied by Design of Experiments in Milk. J FOOD QUALITY 2021. [DOI: 10.1155/2021/9977646] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Spore forming bacteria are special problems for the dairy industry. Heat treatments are insufficient to kill the spores. This is a continuously increasing problem for the industry, but we should be able to control it. In this context, we investigated the combined effect of nisin, monolaurin, and pH values on three heat resistant spores in UHT milk and distilled water and to select an optimal combination for the maximum spore inactivation. The inhibitory effect of nisin (between 50 and 200 IU/ml), monolaurin (ranging from 150 to 300 µg/ml), and pH (between 5 and 8) was investigated using a central composite plan. Results were analyzed using the response surface methodology (RSM). The obtained data showed that the inactivation of Bacillus spores by the combined effect of nisin-monolaurin varies with spore species, acidity, and nature of the medium in which the bacterial spores are suspended. In fact, Terribacillus aidingensis spores were more resistant, to this treatment, than Paenibacillus sp. and Bacillus sporothermodurans ones. The optimum process parameters for a maximum reduction of bacterial spores (∼3log) were obtained at a concentration of nisin >150 IU/ml and of monolaurin >200 µg/ml. The current study highlighted the presence of a synergistic effect between nisin and monolaurin against heat bacterial spores. So, such treatment could be applied by the dairy industry to decontaminate UHT milk and other dairy products from bacterial spores.
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Makowski K, Leszczewicz M, Broncel N, Lipińska-Zubrycka L, Głębski A, Komorowski P, Walkowiak B. Isolation, Biochemical Characterisation and Identification of Thermotolerant and Cellulolytic Paenibacillus lactis and Bacillus licheniformis. Food Technol Biotechnol 2021; 59:325-336. [PMID: 34759764 PMCID: PMC8542176 DOI: 10.17113/ftb.59.03.21.7096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 06/24/2021] [Indexed: 11/12/2022] Open
Abstract
Research background Cellulose is an ingredient of waste materials that can be converted to other valuable substances. This is possible provided that the polymer molecule is degraded to smaller particles and used as a carbon source by microorganisms. Because of the frequently applied methods of pretreatment of lignocellulosic materials, the cellulases derived from thermophilic microorganisms are particularly desirable. Experimental approach We were looking for cellulolytic microorganisms able to grow at 50 °C and we described their morphological features and biochemical characteristics based on carboxymethyl cellulase (CMCase) activity and the API® ZYM system. The growth curves during incubation at 50 °C were examined using the BioLector® microbioreactor. Results and conclusions Forty bacterial strains were isolated from fermenting hay, geothermal karst spring, hot spring and geothermal pond at 50 °C. The vast majority of the bacteria were Gram-positive and rod-shaped with the maximum growth temperature of at least 50 °C. We also demonstrated a large diversity of biochemical characteristics among the microorganisms. The CMCase activity was confirmed in 27 strains. Hydrolysis capacities were significant in bacterial strains: BBLN1, BSO6, BSO10, BSO13 and BSO14, and reached 2.74, 1.62, 1.30, 1.38 and 8.02 respectively. Rapid and stable growth was observed, among others, for BBLN1, BSO10, BSO13 and BSO14. The strains fulfilled the selection conditions and were identified based on the 16S rDNA sequences. BBLN1, BSO10, BSO13 were classified as Bacillus licheniformis, whereas BSO14 as Paenibacillus lactis. Novelty and scientific contribution We described cellulolytic activity and biochemical characteristics of many bacteria isolated from hot environments. We are also the first to report the cellulolytic activity of thermotolerant P. lactis. Described strains can be a source of new thermostable cellulases, which are extremely desirable in various branches of circular bioeconomy.
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Affiliation(s)
- Krzysztof Makowski
- Industrial Biotechnology Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland.,Biotechnika, Tymienieckiego 25, 90-350 Lodz, Poland
| | - Martyna Leszczewicz
- Industrial Biotechnology Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland
| | - Natalia Broncel
- Industrial Biotechnology Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland
| | - Lidia Lipińska-Zubrycka
- Industrial Biotechnology Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland.,Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Adrian Głębski
- Industrial Biotechnology Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland
| | - Piotr Komorowski
- Molecular and Nanostructural Biophysics Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland.,Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-537 Lodz, Poland
| | - Bogdan Walkowiak
- Molecular and Nanostructural Biophysics Laboratory, Bionanopark Ltd., Dubois 114/116, 93-465 Lodz, Poland.,Institute of Materials Science and Engineering, Lodz University of Technology, Stefanowskiego 1/15, 90-537 Lodz, Poland
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KIm KH, Seo YL, Baek JH, Jin HM, Jeon CO. Paenibacillus agri sp. nov., isolated from soil. Int J Syst Evol Microbiol 2021; 71. [PMID: 34435945 DOI: 10.1099/ijsem.0.004981] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A strict aerobic bacterium, strain JW14T was isolated from soil in the Republic of Korea. Cells were Gram-stain-positive, non-endospore-forming and motile rods showing catalase-positive and oxidase-negative activities. Growth of strain JW14T was observed at 20-37 °C (optimum, 30 °C), pH 6.0-10.0 (optimum, pH 7.0) and in the presence of 0-2.0% NaCl (optimum, 0%). Strain JW14T contained menaquinone-7 as the sole isoprenoid quinone, anteiso-C15:0, C16:0 and iso-C16 : 0 as the major fatty acids (>10.0%), and diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, three unidentified aminophospholipids and an unidentified lipid as the major polar lipids. The cell-wall peptidoglycan of strain JW14T contained meso-diaminopimelic acid. The DNA G+C content of strain JW14T calculated from the whole genome sequence was 48.1 mol%. Strain JW14T was most closely related to Paenibacillus graminis DSM 15220T with 97.4% 16S rRNA gene sequence similarity. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain JW14T formed a distinct phyletic lineage from closely related type strains within the genus Paenibacillus. Based on the results of phenotypic, chemotaxonomic and molecular analyses, strain JW14T represents a novel species of the genus Paenibacillus, for which the name Paenibacillus agri sp. nov. is proposed. The type strain is JW14T (=KACC 21840T=JCM 34279T).
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Affiliation(s)
- Kyung Hyun KIm
- Department of Life Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ye Lin Seo
- Department of Life Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Ju Hye Baek
- Department of Life Science, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Hyun Mi Jin
- Nakdonggang National Institute of Biological Resources, Sangju-si, Gyeongsangbuk-do 37242, Republic of Korea
| | - Che Ok Jeon
- Department of Life Science, Chung-Ang University, Seoul 06974, Republic of Korea
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Microbiota Assessments for the Identification and Confirmation of Slit Defect-Causing Bacteria in Milk and Cheddar Cheese. mSystems 2021; 6:6/1/e01114-20. [PMID: 33563789 PMCID: PMC7883541 DOI: 10.1128/msystems.01114-20] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Food production involves numerous control points for microorganisms to ensure quality and safety. These control points (e.g., pasteurization) are difficult to develop for fermented foods wherein some microbial contaminants are also expected to provide positive contributions to the final product and spoilage microbes may constitute only a small proportion of all microorganisms present. Validated methods are needed to detect spoilage microbes present in low numbers in foods and ingredients prior to defect onset. We applied propidium monoazide combined with 16S rRNA gene sequencing, qPCR, isolate identification, and pilot-scale cheese making to identify the microorganisms that cause slit defects in industrially produced Cheddar cheese. To investigate milk as the source of spoilage microbes, bacterial composition in milk was measured immediately before and after high-temperature, short-time (HTST) pasteurization over 10-h periods on 10 days and in the resulting cheese blocks. Besides HTST pasteurization-induced changes to milk microbiota composition, a significant increase in numbers of viable bacteria was observed over the 10-h run times of the pasteurizer, including 68-fold-higher numbers of the genus Thermus. However, Thermus was not associated with slit development. Milk used to make cheese which developed slits instead contained a lower number of total bacteria, higher alpha diversity, and higher proportions of Lactobacillus, Bacillus, Brevibacillus, and Clostridium. Only Lactobacillus proportions were significantly increased during cheese aging, and Limosilactobacillus (Lactobacillus) fermentum, in particular, was enriched in slit-containing cheeses and the pre- and post-HTST-pasteurization milk used to make them. Pilot-scale cheeses developed slits when inoculated with strains of L. fermentum, other heterofermentative lactic acid bacteria, or uncultured bacterial consortia from slit-associated pasteurized milk, thereby confirming that low-abundance taxa in milk can negatively affect cheese quality. The likelihood that certain microorganisms in milk cause slit defects can be predicted based on comparisons of the bacteria present in the milk used for cheese manufacture. IMPORTANCE Food production involves numerous control points for microorganisms to ensure quality and safety. These control points (e.g., pasteurization) are difficult to develop for fermented foods wherein some microbial contaminants are also expected to provide positive contributions to the final product and spoilage microbes may constitute only a small proportion of all microorganisms present. We showed that microbial composition assessments with 16S rRNA marker gene DNA sequencing are sufficiently robust to detect very-low-abundance bacterial taxa responsible for a major but sporadic Cheddar cheese spoilage defect. Bacterial composition in the (pasteurized) milk and cheese was associated with slit defect development. The application of Koch’s postulates showed that individual bacterial isolates as well as uncultured bacterial consortia were sufficient to cause slits, even when present in very low numbers. This approach may be useful for detection and control of low-abundance spoilage microorganisms present in other foods.
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Paenibacillus puerhi sp. nov., isolated from the rhizosphere soil of Pu-erh tea plants (Camellia sinensis var. assamica). Arch Microbiol 2021; 203:1375-1382. [PMID: 33386866 DOI: 10.1007/s00203-020-02135-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 11/17/2020] [Accepted: 11/19/2020] [Indexed: 10/22/2022]
Abstract
An aerobic, Gram-staining-positive, rod-shaped, endospore-forming and motile bacterial strain, designated SJY2T, was isolated from the rhizosphere soil of tea plants (Camellia sinensis var. assamica) collected in the organic tea garden of the Jingmai Pu-erh tea district in Pu'er city, Yunnan, southwest China. Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate belonged to the genus Paenibacillus. The closest phylogenetic relative was Paenibacillus filicis DSM 23916T (98.1% similarity). The major fatty acids (> 10% of the total fatty acids) were anteiso-C15:0 and isoC16:0. The major respiratory quinone was MK-7 and the major polar lipid was diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and phosphatidylmonomethylethanolamine. The peptidoglycan contained glutamic acid, serine, alanine and meso-diaminopimelic acid. Genome sequencing revealed a genome size of 6.71 Mbp and a G + C content of 53.1%. Pairwise determined whole genome average nucleotide identity (gANI) values and digital DNA-DNA hybridization (dDDH) values suggested that strain SJY2T represents a new species, for which we propose the name Paenibacillus puerhi sp. nov. with the type strain SJY2T (= CGMCC 1.17156T = KCTC 43242T).
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Koh J, Victor AF, Howell ML, Yeo JG, Qu Y, Selover B, Waite-Cusic J, Dallas DC. Bile Salt-Stimulated Lipase Activity in Donor Breast Milk Influenced by Pasteurization Techniques. Front Nutr 2020; 7:552362. [PMID: 33282897 PMCID: PMC7689290 DOI: 10.3389/fnut.2020.552362] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 10/26/2020] [Indexed: 11/13/2022] Open
Abstract
Breast milk contains bile salt-stimulated lipase (BSSL), which significantly increases the fat digestion capacity of newborns who have limited pancreatic lipase secretion in the first few months after birth. Problematically, Holder pasteurization used in non-profit milk banks to ensure the microbiological safety of donor milk for infants, particularly preterm infants (<37 weeks gestation age), destroys milk BSSL, thus limiting infant fat absorption capacity. Alternative strategies are needed to ensure the safety of donor milk while preserving BSSL activity. Three alternative pasteurization techniques—high-pressure processing (HPP, 550 MPa, 5 min), gamma cell irradiation (IR, 2.5 Mrads) and UV-C (254 nm, 0–33,000 J/L)—were compared with Holder pasteurization (low-temperature long-time, LTLT, 62.5°C, 30 min) for retention of BSSL activity in donor breast milk. As the time required for donor milk pasteurization by UV-C in published methods was not clear, donor breast milk was spiked with seven common bacterial strains and treated by UV-C for variable time periods and the minimum UV-C dosage required to achieve a 5-log10 reduction of CFU/mL was determined. Eight thousand two hundred fifty J/L of UV-C exposure was sufficient to achieve 5-log10 reduction of each of bacterial targets, including Bacillus and Paenibacillus spores. The retention of BSSL activity was highest after HPP (retaining 62% of the untreated milk BSSL activity), followed by UV-C (16,500 J/L), IR and LTLT (35, 29, and 0.3% retention, respectively). HPP was an effective alternative to pasteurize milk with improved retention of BSSL activity compared to Holder pasteurization. Future work should investigate the effect of alternative pasteurization techniques on the entire array of bioactive components in donor breast milk and how these changes affect preterm infant health outcomes. Implementation of HPP technique at milk banks could improve donor milk-fed infant fat absorption and growth.
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Affiliation(s)
- Jeewon Koh
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States
| | - Ashley F Victor
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States
| | - Matthew L Howell
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States
| | - Jooyoung G Yeo
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States
| | - Yunyao Qu
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States.,Department of Food Science and Technology, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States
| | - Brandon Selover
- Department of Food Science and Technology, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States
| | - Joy Waite-Cusic
- Department of Food Science and Technology, College of Agricultural Sciences, Oregon State University, Corvallis, OR, United States
| | - David C Dallas
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, United States
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14
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Sisk-Hackworth L, Kelley ST. An application of compositional data analysis to multiomic time-series data. NAR Genom Bioinform 2020; 2:lqaa079. [PMID: 33575625 PMCID: PMC7671389 DOI: 10.1093/nargab/lqaa079] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 08/07/2020] [Accepted: 09/07/2020] [Indexed: 12/18/2022] Open
Abstract
Compositional data analysis (CoDA) methods have increased in popularity as a new framework for analyzing next-generation sequencing (NGS) data. CoDA methods, such as the centered log-ratio (clr) transformation, adjust for the compositional nature of NGS counts, which is not addressed by traditional normalization methods. CoDA has only been sparsely applied to NGS data generated from microbial communities or to multiple ‘omics’ datasets. In this study, we applied CoDA methods to analyze NGS and untargeted metabolomic datasets obtained from bacterial and fungal communities. Specifically, we used clr transformation to reanalyze NGS amplicon and metabolomics data from a study investigating the effects of building material type, moisture and time on microbial and metabolomic diversity. Compared to analysis of untransformed data, analysis of clr-transformed data revealed novel relationships and stronger associations between sample conditions and microbial and metabolic community profiles.
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Affiliation(s)
| | - Scott T Kelley
- Department of Biology, San Diego State University, San Diego, CA 92182, USA
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15
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Rasane P, Sharma N, Fatma S, Kaur S, Jha A, Kaur D, Singh J. Ultra-high Temperature (UHT) Processing: Technological Significance and Updates. CURRENT NUTRITION & FOOD SCIENCE 2020. [DOI: 10.2174/1573401316666200217111113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Background: Milk forms an integral part of the human diet from the nutritional point of
view. Besides nutrition, it has also unique functional properties which are harnessed by the industry
for numerous uses. Being highly perishable specific techniques are required to minimize the losses
during processing and adequate preservation of this precious commodity. In the U.S. and many other
parts of the world, the traditional pasteurization of milk requires a minimum heat treatment of 72ºC
for 15 seconds with subsequent refrigeration. However, the advent of Ultra High Temperature (UHT)
treatment of milk has added a new dimension to the marketing of liquid milk in urban as well as remote
areas without the requirement of cold chain management. The distinctive feature of UHT processed
milk is that it is commercially-sterile-not pasteurized and so has long shelf life at room temperature.
UHT milk, also known as long-life milk, is emerging as an attractive commercial alternative
offering a hygienic product of unmatched quality, which can be bought anywhere, at any time
and in any quantity. The present review will discuss numerous aspects of UHT processing of milk
with reference to historical significance, fundamental principle, various systems used and prerequisites,
type of exchangers used, fouling and other defects in system, chemical and microbiological effect
of the treatment, its effect on nutritional components, organoleptic quality of milk and the advantage
and involved challenges of the process.
Conclusion:
Raw milk is easily contaminated with pathogens and microbes and hence its consumption
of raw milk is associated with certain ill health effects. Therefore, heating milk before consumption
is strongly suggested. Thus, UHT treatment of milk is done to ensure microbial safety and also
to extend the shelf life of this highly perishable commodity. Heating milk at such a high temperature
is often associated with the change of organoleptic properties like change in flavor or cooked flavor,
rancidity due to microbes or acid flavor, etc. But UHT treatment does not substantially decrease the
nutritional value or any other benefits of milk.
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Affiliation(s)
- Prasad Rasane
- Department of Food Technology and Nutrition, Lovely Professional University, Punjab 144411, India
| | - Nitya Sharma
- Department of Farm Engineering, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Sana Fatma
- Department of Dairy Science and Food Technology, Banaras Hindu University, Varanasi 221005, India
| | - Sawinder Kaur
- Department of Food Technology and Nutrition, Lovely Professional University, Punjab 144411, India
| | - Alok Jha
- Department of Dairy Science and Food Technology, Banaras Hindu University, Varanasi 221005, India
| | - Damanpreet Kaur
- Department of Food Technology and Nutrition, Lovely Professional University, Punjab 144411, India
| | - Jyoti Singh
- Department of Food Technology and Nutrition, Lovely Professional University, Punjab 144411, India
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16
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Lee SA, Kim TW, Heo J, Sang MK, Song J, Kwon SW, Weon HY. Paenibacillus lycopersici sp. nov. and Paenibacillus rhizovicinus sp. nov., isolated from the rhizosphere of tomato (Solanum lycopersicum). J Microbiol 2020; 58:832-840. [PMID: 32989640 DOI: 10.1007/s12275-020-0258-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 11/25/2022]
Abstract
Two Gram-stain-positive, rod-shaped, endospore-forming bacteria, designated 12200R-189T and 14171R-81T were isolated from the rhizosphere of tomato plants. The 16S rRNA gene sequence similarity between strains 12200R-189T and 14171R-81T were 97.2%. Both strains showed the highest 16S rRNA gene sequence similarities to Paenibacillus sacheonensis SY01T (96.3% and 98.0%, respectively). The genome of strain 12200R-189T was approximately 6.7 Mb in size with 5,750 protein-coding genes (CDSs) and the G + C content was 58.1 mol%, whereas that of strain 14171R-81T comprised one chromosome of 7.0 Mb and two plasmids (0.2 Mb each) with 6,595 CDSs and the G + C content was 54.5 mol%. Comparative genome analysis revealed that average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values among 12200R-189T, 14171R-81T, and other closely related species were below the cut-off levels 95% and 70%, respectively. Strain 12200R-189T grew at a temperature range of 15-40°C, pH 6.0-9.0, and 0-3% NaCl (w/v), whereas strain 14171R-81T grew at a temperature range of 10-37°C, pH 6.0-8.0, and 0-1% NaCl (w/v). Menaquinone-7 (MK-7) was the only isoprenoid quinone detected in both strains. The predominant cellular fatty acids (> 10%) were iso-C15:0, anteiso-C15:0, and iso-C16:0. The polar lipids of strain 12200R-189T were diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), aminophospholipid (APL), phospholipid (PL), phosphatidylglycolipid (PGL), and four aminophosphoglycolipids (APGLs) and those of strain 14171R-81T were DPG, PG, PE, APL, three PLs, two PGLs, and three APGLs. Based on phylogenetic, genomic, phenotypic, and chemotaxonomic analyses, strains 12200R-189T and 14171R-81T represent two novel species of the genus Paenibacillus, for which the names Paenibacillus lycopersici sp. nov. and Paenibacillus rhizovicinus sp. nov. are proposed. The type strains are 12200R-189T (= KACC 19916T = CCTCC AB 2020027T) and 14171R-81T (= KACC 19915T = CCTCC AB 2020026T).
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Affiliation(s)
- Shin Ae Lee
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
| | - Tae-Wan Kim
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
| | - Jun Heo
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
| | - Mee-Kyung Sang
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
| | - Jaekyeong Song
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
| | - Soon-Wo Kwon
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
| | - Hang-Yeon Weon
- Agricultural Microbiology Division, National Institute of Agricultural Sciences, Rural Development Administration, Wanju-gun, Jeollabuk-do, 55365, Republic of Korea
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17
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Detection of spore forming Paenibacillus macerans in raw milk. J Microbiol Methods 2020; 177:106048. [PMID: 32890571 DOI: 10.1016/j.mimet.2020.106048] [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: 07/29/2020] [Revised: 08/17/2020] [Accepted: 08/17/2020] [Indexed: 11/22/2022]
Abstract
Paenibacillus macerans can cause spoilage of milk during extended storage. However, the natural milk microbiota interferes with the enumeration of Paenibacillus species in raw milk. In this study, a qualitative SYBR Green real-time PCR assay based on the groEL gene was developed for detecting P. macerans (PMassay) in raw milk and compared with one designed for total Paenibacillus detection (TPassay). The specificity of the PMassay was confirmed against a panel of dairy-related spore forming isolates. In the presence of background DNA substituted up to 95%, P. macerans DNA could still be detected by the PMassay although interference occurred as non-target DNA substitution increased. The PMassay was sensitive (detection limit of 2 log CFU/ml in milk) and specific as non-P. macerans isolates gave a Ct > 30. After enrichment of raw milk for 7 days at 37 °C in Reinforced Clostridial Medium with D-cycloserine (RCM-D) under anaerobiosis, Paenibacillus was detected in 10 of the 16 raw milk samples tested. Enrichment in RCM-D yielded about 0.5 to 5.8 log CFU/ml total Paenibacillus and 0.3 to 4.6 log CFU/ml P. macerans in the samples. The assay could be useful in commercial settings, allowing a sensitive detection of P. macerans.
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18
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Ripa FA, Tong S, Cao WD, Wang ET, Wang T, Liu HC, Gao JL, Sun JG. Paenibacillus rhizophilus sp. nov., a nitrogen-fixing bacterium isolated from the rhizosphere of wheat ( Triticum aestivum L.). Int J Syst Evol Microbiol 2019; 69:3689-3695. [PMID: 31647399 DOI: 10.1099/ijsem.0.003472] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel Gram-stain-variable, endospore-forming, motile, rod-shaped, facultative aerobic bacterium, designated 7197T, was isolated from rhizosphere soil of wheat (Triticum aestivum L.) collected from Yakeshi County, Inner Mongolia, PR China. This isolate was found to have the highest 16S rRNA gene sequence similarity to Paenibacillussabinae T27T (98.0 %), followed by Paenibacillussophorae S27T (97.9 %) and Paenibacillusforsythiae T98T (97.7 %). To ascertain the genomic relatedness of this strain to its phylogenetic neighbours, its genome sequence was determined. The average nucleotide identity values of genome sequences between the novel isolate and the type strains of related species P. sabinae T27T, P. sophorae S27T and P. forsythiae T98T were 87.9 %, 85.8 and 83.9 %, respectively. The polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, four unidentified aminophospholipids and one unidentified aminolipid. The major cellular fatty acids were anteiso-C15 : 0 (56.3 %), C16 : 0 (15.7 %) and iso-C15 : 0 (14.1 %).The genome size of strain 7197T was 5.21 Mb, comprising 4879 predicted genes with a DNA G+C content of 51.9 mol%. Menaquinone-7 was reported as the major respiratory quinone. The diamino acid in the cell-wall peptidoglycan was found to be meso-diaminopimelic acid. Based on phylogenetic, genomic, chemotaxonomic and phenotypic characteristics, strain 7197T was classified as a novel species within the genus Paenibacillus, for which the name Paenibacillus rhizophilus sp. nov. is proposed. The type strain of Paenibacillus rhizophilus is 7197T (=DSM 103168T=CGMCC 1.15699T).
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Affiliation(s)
- Farhana Alam Ripa
- Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Shuai Tong
- Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Wei-Dong Cao
- Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - En Tao Wang
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, México D. F. 11340, México
| | - Tianyu Wang
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry/Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing 100097, PR China.,Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Hong Can Liu
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Jun-Lian Gao
- Beijing Agro-Biotechnology Research Center, Beijing Academy of Agriculture and Forestry/Beijing Key Laboratory of Agricultural Genetic Resources and Biotechnology, Beijing 100097, PR China
| | - Jian-Guang Sun
- Key Laboratory of Microbial Resources, Ministry of Agriculture and Rural Affairs/ Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
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19
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Nunn PB, Codd GA. Environmental distribution of the neurotoxin l-BMAA in Paenibacillus species. Toxicol Res (Camb) 2019; 8:781-783. [PMID: 32922737 DOI: 10.1039/c9tx00203k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 09/23/2019] [Indexed: 11/21/2022] Open
Abstract
The environmental distribution of the neurotoxic amino acid, 3-N-methyl-2,3-diaminopropanoic acid (BMAA), first isolated in 1967, was initially believed to be limited to tropical and subtropical plants of the genus Cycas. The seeds of one such species, which had been used historically on the Pacific island of Guam as a foodstuff, had a reputation for neurotoxicity. Some 40 years later the amino acid was detected in terrestrial and aquatic cyanobacteria and in other aquatic organisms. Overlooked was the discovery of BMAA in peptides of bizarre structure that had been isolated in 1975 from Paenibacillus pulvifaciens during a search for antibiotics. More recently (2014), peptides of similar structure were isolated from Paenibacillus larvae; this organism is causative of American Foulbrood, a lethal disease of honeybee colonies. These are interesting chemical and environmental observations, but knowledge of the bacterial distribution of BMAA is limited to just these two species of Paenibacillus, while more than 200 Paenibacillus spp. are known. Paenibacillus spp. are ever present naturally in the environment and are used agriculturally; recent research reports that some species infect human foods - including cow's milk - and have been isolated from human body fluids. We wish to stimulate interest in the environmental distribution of the neurotoxic BMAA in Paenibacillus spp. by drawing together previously isolated streams of research and by proposing experimental approaches by which this matter might be resolved.
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Affiliation(s)
- Peter B Nunn
- School of Biological and Chemical Sciences , Queen Mary University of London , Mile End Road , London E1 4NS , UK . ; ; Tel: +44(0)1483-812098
| | - Geoffrey A Codd
- School of Life Sciences , University of Dundee , DD1 5EH , UK.,School of Natural Sciences , University of Stirling , FK9 4LA , UK . ,uk
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20
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Antimicrobial properties of the novel bacterial isolate Paenibacilllus sp. SMB1 from a halo-alkaline lake in India. Sci Rep 2019; 9:11561. [PMID: 31399607 PMCID: PMC6688988 DOI: 10.1038/s41598-019-47879-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 07/17/2019] [Indexed: 12/23/2022] Open
Abstract
Antibiotic-resistance is ever growing burden on our society for the past many years. Many synthetic chemistry approaches and rational drug-design have been unable to pace up and tackle this problem. Natural resources, more specifically, the microbial diversity, on the other hand, make a traditional and still the best platform to search for new chemical scaffolds and compounds. Here, we report the antimicrobial characteristics of novel bacterial isolate from a salt lake in India. We screened the bacterial isolates for their inhibitory activity against indicator bacteria and found that four novel species were able to prevent the growth of test strains studied in vitro. Further, we characterized one novel species (SMB1T = SL4-2) using polyphasic taxonomic approaches and also purified the active ingredient from this bacterium. We successfully characterized the antimicrobial compound using mass spectroscopy and amino acid analysis. We also allocated two novel biosynthetic gene clusters for putative bacteriocins and one novel non-ribosomal peptide gene cluster in its whole genome. We concluded that the strain SMB1T belonged to the genus Paenibacilllus with the pairwise sequence similarity of 98.67% with Paenibacillus tarimensis DSM 19409T and we proposed the name Paenibacillus sambharensis sp. nov. The type strain is SMB1T (=MTCC 12884 = KCTC 33895T).
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21
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Biological Synthesis of Ginsenoside Rd Using Paenibacillus horti sp. nov. Isolated from Vegetable Garden. Curr Microbiol 2018; 75:1566-1573. [DOI: 10.1007/s00284-018-1561-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 08/28/2018] [Indexed: 02/03/2023]
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22
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Hwang YJ, Son JS, Ghim SY. Paenibacillus elymi sp. nov., isolated from the rhizosphere of Elymus tsukushiensis, a plant native to the Dokdo Islands, Republic of Korea. Int J Syst Evol Microbiol 2018; 68:2615-2621. [DOI: 10.1099/ijsem.0.002892] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Ye-Ji Hwang
- 1School of Life Sciences, Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea
| | - Jin-Soo Son
- 2School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea
| | - Sa-Youl Ghim
- 1School of Life Sciences, Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea
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23
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Zhao ZL, Ming H, Ji WL, Khieu TN, Chu-Ky S, Cheng LJ, Meng XL, Li WJ, Nie GX. Paenibacillus esterisolvens sp. nov., isolated from soil. Int J Syst Evol Microbiol 2018; 68:2145-2150. [PMID: 29701575 DOI: 10.1099/ijsem.0.002754] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-positive, aerobic, motile with peritrichous flagella, rod-shaped bacterium, designated CFH S0170T, was isolated from a soil sample collected from Catba island in Ha Long Bay, Hai Phong City, Vietnam. Comparison of the 16S rRNA gene sequences showed that strain CFH S0170T belonged to the genus Paenibacillus and showed closest relationship with Paenibacillus vulneris CCUG 53270T (98.1 % similarity). Phylogenetic analysis demonstrated that the novel candidate formed a coherent branch with P. vulneris CCUG 53270T and Paenibacillus yunnanensis YN2T. Furthermore, the novel strain shared 87.2 % rpoB gene sequence similarity with P. vulneris CCUG 53270T. Growth of strain CFH S0170T occurred at 10-40 °C, pH 6.0-8.0 and with 0-2.0 % (w/v) NaCl. Strain CFH S0170T contained mannose, glucose and rhamnose as the major whole-cell sugars. The cell-wall peptidoglycan contained meso-diaminopimelic acid, glutamic acid, lysine and aspartic acid. The polar lipid profile contained diphosphatidylglycerol, phosphatidylethanolamine, glycolipids and phospholipids. The dominant cellular fatty acids included anteiso-C15 : 0 and C15 : 0. The genomic DNA G+C content was 50.9 mol%. On the basis of phenotypic, chemotaxonomic and phylogenetic analysis, strain CFH S0170T is affiliated to the genus Paenibacillus, but could be distinguished from other valid species of this genus. It is concluded that strain CFH S0170T should be considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus esterisolvens sp. nov. is proposed. The type strain is CFH S0170T (=KCTC 33624T=BCRC 80802T).
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Affiliation(s)
- Zhuo-Li Zhao
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Hong Ming
- College of Life Sciences and Technology, Xinxiang Medical University, Xinxiang 453003, PR China
| | - Wei-Li Ji
- College of Life Sciences and Technology, Xinxiang Medical University, Xinxiang 453003, PR China
| | - Thi-Nhan Khieu
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, PR China.,Department of Food Technology, School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Son Chu-Ky
- Department of Food Technology, School of Biotechnology and Food Technology, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Li-Jiao Cheng
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Xiao-Lin Meng
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
| | - Wen-Jun Li
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou 510275, PR China
| | - Guo-Xing Nie
- College of Fisheries, Henan Normal University, Xinxiang 453007, PR China
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24
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Deeth H. Optimum Thermal Processing for Extended Shelf-Life (ESL) Milk. Foods 2017; 6:E102. [PMID: 29156617 PMCID: PMC5704146 DOI: 10.3390/foods6110102] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 11/16/2017] [Indexed: 11/16/2022] Open
Abstract
Extended shelf-life (ESL) or ultra-pasteurized milk is produced by thermal processing using conditions between those used for traditional high-temperature, short-time (HTST) pasteurization and those used for ultra-high-temperature (UHT) sterilization. It should have a refrigerated shelf-life of more than 30 days. To achieve this, the thermal processing has to be quite intense. The challenge is to produce a product that has high bacteriological quality and safety but also very good organoleptic characteristics. Hence the two major aims in producing ESL milk are to inactivate all vegetative bacteria and spores of psychrotrophic bacteria, and to cause minimal chemical change that can result in cooked flavor development. The first aim is focused on inactivation of spores of psychrotrophic bacteria, especially Bacillus cereus because some strains of this organism are pathogenic, some can grow at ≤7 °C and cause spoilage of milk, and the spores of some strains are very heat-resistant. The second aim is minimizing denaturation of β-lactoglobulin (β-Lg) as the extent of denaturation is strongly correlated with the production of volatile sulfur compounds that cause cooked flavor. It is proposed that the heating should have a bactericidal effect, B* (inactivation of thermophilic spores), of >0.3 and cause ≤50% denaturation of β-Lg. This can be best achieved by heating at high temperature for a short holding time using direct heating, and aseptically packaging the product.
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Affiliation(s)
- Hilton Deeth
- School of Agriculture and Food Sciences, University of Queensland, Brisbane 4072, Australia.
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25
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Renchinkhand G, Cho SH, Urgamal M, Park YW, Nam JH, Bae HC, Song GY, Nam MS. Characterization of Paenibacillus sp. MBT213 Isolated from Raw Milk and Its Ability to Convert Ginsenoside Rb 1 into Ginsenoside Rd from Panax ginseng. Korean J Food Sci Anim Resour 2017; 37:735-742. [PMID: 29147097 PMCID: PMC5686332 DOI: 10.5851/kosfa.2017.37.5.735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 09/19/2017] [Accepted: 09/20/2017] [Indexed: 11/06/2022] Open
Abstract
This study was conducted to isolate and characterize Paenibacillus sp. MBT213 possessing β-glucosidase activity from raw milk, and examine the enzymatic capacity on the hydrolysis of a major ginsenoside (Rb1). Strain MBT213 was found to have a high hydrolytic ability on ginsenoside Rb1 by Esculin Iron Agar test. 16S rDNA analysis revealed that MBT213 was Paenibacillu sp. Crude enzyme of MBT213 strain exhibited high conversion capacity on ginsenoside Rb1 into ginsenoside Rd proven by TLC and HPLC analyses. The API ZYM kit confirmed that Paenibacillu sp. MBT213 exerted higher β-glucosidase and β-galactosidase activity than other strains. Optimum pH and temperature for crude enzyme were found at 7.0 and 35°C in hydrolysis of ginsenoside Rb1. After 10 d of optimal reaction conditions for the crude enzyme, ginsenoside Rb1 fully converted to ginsenoside Rd. Ginseng roots (20%) were fermented for 14 d, and analyzed by HPLC showed that amount of ginsenoside Rb1 significantly decreased, while that of ginsenoside Rd was significantly increased. The study confirmed that the β-glucosidase produced by Paenibacillus sp. MBT213 can hydrolyze the major ginsenoside Rb1 and convert to Rd during fermentation of the ginseng. The β-glucosidase activity of this novel Paenibacillus sp. MBT213 strain may be utilized in development of variety of health foods, dairy foods and pharmaceutical products.
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Affiliation(s)
- Gereltuya Renchinkhand
- Department of Animal Biosystem Science, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Korea
| | | | - Magsar Urgamal
- Department of Animal Biosystem Science, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Korea
| | - Young W Park
- Agricultural Research Station, Fort Valley State University, Fort Valley, GA 31030, USA, and Department of Food Science & Technology, University of Georgia, Athens, GA 30602, USA
| | - Joong Hyeon Nam
- Department of Animal Biosystem Science, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Korea
| | - Hyung Churl Bae
- Department of Animal Biosystem Science, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Korea
| | - Gyu Yong Song
- College of Pharmacy, Chungnam National University, Daejeon, 34134, Korea
| | - Myoung Soo Nam
- Department of Animal Biosystem Science, College of Agriculture and Life Sciences, Chungnam National University, Daejeon, 34134, Korea
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Shin SK, Kim E, Yi H. Paenibacillus crassostreae sp. nov., isolated from the Pacific oyster Crassostrea gigas. Int J Syst Evol Microbiol 2017; 68:58-63. [PMID: 29068277 DOI: 10.1099/ijsem.0.002444] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-positive, endospore-forming, rod-shaped, aerobic bacterium, designated LPB0068T, was isolated from a Pacific oyster (Crassostrea gigas) in Korea. This isolate was found to share the highest 16S rRNA gene sequence similarity with Paenibacillus macquariensis subsp. macquariensis DSM 2T (98.1 %) and Paenibacillus macquariensis subsp. defensor JCM 14954T (98.0 %). To establish the genomic relatedness of this isolate to its phylogenetic neighbours, its genome sequence and those of Paenibacillus antarcticus CECT 5836T, P. macquariensis subsp. macquariensis DSM 2T, P. macquariensis subsp. defensor JCM 14954T, and Paenibacillus glacialis DSM 22343T were determined. The low average nucleotide identity and digital DNA-DNA hybridization values exhibited by LPB0068T in relation to the other strains in this analysis revealed that it is distinct from other Paenibacillus species. The genome of strain LPB0068T consists of one chromosome and three circular plasmids, and had a DNA G+C content of 40.0 mol%. The major respiratory quinone was menaquinone-7 and the diagnostic diamino acid in the cell-wall peptidoglycan was meso-diaminopimelic acid. The major polar lipids consisted of phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine, one unidentified phospholipid, one unidentified glycolipid, and two unidentified polar lipids. The major cellular fatty acids were anteiso-C15 : 0, C14 : 0, and C16 : 0. Based on genomic, phylogenetic, and phenotypic characteristics, this strain was clearly distinguished from other Paenibacillus species with validly published names and should therefore be classified as a novel species of the genus. The name Paenibacillus crassostreae sp. nov. is proposed, the type strain of which is LPB0068T (=KACC 18694T=JCM 31183T).
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Affiliation(s)
- Su-Kyoung Shin
- Department of Public Health Sciences, BK21PLUS Program in Embodiment: Health-Society Interaction, Graduate School, Korea University, Seoul, Republic of Korea
| | - Eunji Kim
- Department of Public Health Sciences, BK21PLUS Program in Embodiment: Health-Society Interaction, Graduate School, Korea University, Seoul, Republic of Korea
| | - Hana Yi
- Department of Public Health Sciences, BK21PLUS Program in Embodiment: Health-Society Interaction, Graduate School, Korea University, Seoul, Republic of Korea.,School of Biosystem and Biomedical Science, Korea University, Seoul, Republic of Korea
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Zhuang J, Xin D, Zhang YQ, Guo J, Zhang J. Paenibacillus albidus sp. nov., isolated from grassland soil. Int J Syst Evol Microbiol 2017; 67:4685-4691. [PMID: 28950930 DOI: 10.1099/ijsem.0.002356] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel bacterial strain, designed Q4-3T, was isolated from a soil sample obtained from Qilian grassland, Qinghai, China. Phylogenetic, phenotypic, chemotaxonomic and molecular analyses were performed on the new isolate. Cells were Gram-stain-positive, facultatively anaerobic, spore-forming, motile rods with peritrichous flagella. Phylogenetic analysis based on 16S rRNA gene sequences placed strain Q4-3T in the genus Paenibacillus, and its closest relatives were Paenibacillus odorifer JCM 21743T, Paenibacillus typhae DSM 25190T, Paenibacillus borealis DSM 13188T and Paenibacillus etheri DSM 29760T with 16S rRNA gene sequence similarities of 98.12, 97.89, 97.63 and 97.6 %, respectively. The isolate grew at 4-37 °C (optimum 28-30 °C), at pH 6.0-10.0 (optimum pH 7.5) and with 0-3 %(w/v) NaCl (optimum 1 %). The DNA of strain Q4-3T was determined to be 48.6 mol%. The predominant menaquinone was MK-7 and the diamino acid in the cell-wall peptidoglycan was found to be meso-diaminopimelic acid. Anteiso-C15 : 0 (55.5 %), iso-C16 : 0 (14.5 %) and C16 : 0 (13.3 %) were the major fatty acids. The polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, three unidentified aminophospholipids and one unidentified lipid. Based on these results, strain Q4-3T is considered to represent a novel of the genus Paenibacillus, for which the name Paenibacillusalbidus nov. is proposed. The type strain is Q4-3T (=CGMCC 1.16134T=KCTC 33911T).
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Affiliation(s)
- Junli Zhuang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Di Xin
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Yu-Qin Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China
| | - Jingnan Guo
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
| | - Jianli Zhang
- School of Life Science, Beijing Institute of Technology, Beijing 100081, PR China
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Kiran S, Swarnkar MK, Mayilraj S, Tewari R, Gulati A. Paenibacillus ihbetae sp. nov., a cold-adapted antimicrobial producing bacterium isolated from high altitude Suraj Tal Lake in the Indian trans-Himalayas. Syst Appl Microbiol 2017; 40:430-439. [PMID: 28882448 DOI: 10.1016/j.syapm.2017.07.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Revised: 05/01/2017] [Accepted: 07/19/2017] [Indexed: 10/19/2022]
Abstract
The assessment of bacterial diversity and bioprospection of the high-altitude lake Suraj Tal microorganisms for potent antimicrobial activities revealed the presence of two Gram-stain-variable, endospore-forming, rod-shaped, aerobic bacteria, namely IHBB 9852T and IHBB 9951. Phylogenetic analysis based on 16S rRNA gene sequence showed the affiliation of strains IHBB 9852T and IHBB 9951 within the genus Paenibacillus, exhibiting the highest sequence similarity to Paenibacillus lactis DSM 15596T (97.8% and 97.7%) and less than 95.9% similarity to other species of the genus Paenibacillus. DNA-DNA relatedness among strains IHBB 9852T and IHBB 9951 was 90.2%, and with P. lactis DSM 15596T, was 52.7% and 52.4%, respectively. The novel strains contain anteiso-C15:0, iso-C15:0, C16:0 and iso-C16:0 as major fatty acids, and phosphatidylglycerol, phosphatidylethanolamine and diphosphatidylglycerol were predominant polar lipids. The DNA G+C content for IHBB 9852T and IHBB 9951 was 52.1 and 52.2mol%. Based on the results of phenotypic and genomic characterisations, we concluded that strains IHBB 9852T and IHBB 9951 belong to a novel Paenibacillus species, for which the name Paenibacillus ihbetae sp. nov. is proposed. The type strain is IHBB 9852T (=MTCC 12459T=MCC 2795T=JCM 31131T=KACC 19072T; DPD TaxonNumber TA00046) and IHBB 9951 (=MTCC 12458=MCC 2794=JCM 31132=KACC 19073) is a reference strain.
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Affiliation(s)
- Shashi Kiran
- Microbial Prospection Division, CSIR-Institute of Himalayan Bioresource Technology, P.O. Box 6, Palampur, H.P. 176 061, India; Department of Microbial Biotechnology, Panjab University, Chandigarh 160 014, India
| | - Mohit Kumar Swarnkar
- Microbial Prospection Division, CSIR-Institute of Himalayan Bioresource Technology, P.O. Box 6, Palampur, H.P. 176 061, India
| | - Shanmugam Mayilraj
- Microbial Type Culture Collection & Gene Bank (MTCC), CSIR-Institute of Microbial Technology, Sector 39A, Chandigarh 160 036, India
| | - Rupinder Tewari
- Department of Microbial Biotechnology, Panjab University, Chandigarh 160 014, India
| | - Arvind Gulati
- Microbial Prospection Division, CSIR-Institute of Himalayan Bioresource Technology, P.O. Box 6, Palampur, H.P. 176 061, India.
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Hwang YJ, Ghim SY. Paenibacillus aceris sp. nov., isolated from the rhizosphere of Acer okamotoanum, a plant native to Ulleungdo Island, Republic of Korea. Int J Syst Evol Microbiol 2017; 67:1039-1045. [PMID: 27995861 DOI: 10.1099/ijsem.0.001748] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Strain KUDC4121T was isolated from the rhizosphere of Acer okamotoanum, a plant native to the Korean island of Ulleungdo. The strain was a Gram-stain-positive, non-spore-forming, non-motile, rod-shaped bacterium that can grow at 18-37 °C and pH 6.0-7.5, with optimum growth at 30 °C and pH 7.0. It grew on tryptic soy agar containing less than 0.5 % (w/v) NaCl and in R2A broth. Cell length ranged from 2.0 to 2.5 µm. Strain KUDC4121T was oxidase- and catalase-positive and did not hydrolyse starch or casein. The genomic G+C content was 48.8 mol%. The major fatty acids were anteiso-C15 : 0 and iso-C16 : 0. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain KUDC4121T belongs to the genus Paenibacillus. The closest type strain was Paenibacillus chondroitinus DSM 5051T, with 97.8 % similarity, followed by Paenibacillus alginolyticus DSM 5050T (97.6 %), Paenibacillus ferrarius CY1T (97.5 %), Paenibacillus pocheonensis Gsoil 1138T (97.5 %), Paenibacillus frigoriresistens YIM 016T (97.5 %), Paenibacillus pectinilyticus RCB-08T (97.2 %) and Paenibacillus aestuarii CJ25T (96.9 %). Based on its phenotypic properties and phylogenetic and genetic data, strain KUDC4121T should be considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus aceris sp. nov. is proposed. The type strain is KUDC4121T (=KCTC 13870T=DSM 24950T).
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Affiliation(s)
- Ye-Ji Hwang
- Republic of Korea School of Life Sciences, BK21 Plus KNU Creative BioResearch Group and Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea
| | - Sa-Youl Ghim
- Republic of Korea School of Life Sciences, BK21 Plus KNU Creative BioResearch Group and Research Institute for Dok-do and Ulleung-do Island, Kyungpook National University, 80 Daehakro, Bukgu, Daegu 41566, Republic of Korea
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30
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Remmas N, Roukouni C, Ntougias S. Bacterial community structure and prevalence of Pusillimonas-like bacteria in aged landfill leachate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:6757-6769. [PMID: 28091993 DOI: 10.1007/s11356-017-8416-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 01/05/2017] [Indexed: 06/06/2023]
Abstract
Although several works have been performed from an engineering point of view, a limited number of studies have focused on microbial communities involved in the humification of aged landfill leachates. In this work, cultivation techniques, next-generation sequencing, and phospholipid fatty acid analysis were adopted to decrypt the diversity and the ecophysiological properties of the dominant microbiota in aged landfill leachate. Based on Illumina sequencing, Betaproteobacteria, Bacteroidetes, Actinobacteria, and Alphaproteobacteria dominated the aged landfill leachate. The main taxa identified at genus level were Pusillimonas-like bacteria and Leucobacter (41.46% of total reads), with all of them being also isolated through cultivation. The presence of Pusillimonas-like bacteria was also verified by the detection of cyclo17:0 and iso-19:0 fatty acids in aged landfill leachate microbiota. Despite that almost all bacterial isolates exhibited extracellular lipolytic ability, no particular specificity was observed in the type of substrate utilized. The prevalence of effective degraders, such as Pusillimonas-like bacteria, makes the aged landfill leachate an ideal source for isolation of novel microorganisms with potential in situ bioremediation uses.
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Affiliation(s)
- Nikolaos Remmas
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece
| | - Charikleia Roukouni
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece
| | - Spyridon Ntougias
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67100, Xanthi, Greece.
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31
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The glycocins: in a class of their own. Curr Opin Struct Biol 2016; 40:112-119. [DOI: 10.1016/j.sbi.2016.09.003] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/01/2016] [Accepted: 09/06/2016] [Indexed: 01/28/2023]
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32
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Yao Z, Guo J, Tang W, Sun Z, Hou Y, Li X. Production of a single cyclic type of fructooligosaccharide structure by inulin-degrading Paenibacillus sp. LX16 newly isolated from Jerusalem artichoke root. Microb Biotechnol 2016; 9:419-29. [PMID: 26996537 PMCID: PMC4835578 DOI: 10.1111/1751-7915.12358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2015] [Revised: 01/21/2016] [Accepted: 01/29/2016] [Indexed: 11/28/2022] Open
Abstract
A novel inulin‐degrading bacterium was isolated from a soil sample collected on Jerusalem artichoke roots. It is a Gram‐positive, aerobic, motile and central endospore‐forming straight rod, and exhibits phenotypic properties being consistent with its classification in the genus Paenibacillus. The predominant cellular fatty acids were anteiso‐C15:0, C16:0 and anteiso‐C17:0. This strain represents a novel species of the genus Paenibacillus on the basis of phenotypic data together with phylogenetic analysis, and it is here designated as LX16 and deposited in China centre for type collection, China (= CCTCC 2015256). Strain LX16 could produce a cyclofructooligosaccharide fructanotransferase catalysing the formation of one type of fructooligosaccharide (FOS) from inulin. The FOS was identified as a cyclofructooligosaccharide with a degree of polymerization of 6. Such homology in inulin degradation products may be beneficial for the functional FOS production.
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Affiliation(s)
- Zhihua Yao
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Jiqiang Guo
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Wenzhu Tang
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Zhen Sun
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Yingmin Hou
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
| | - Xianzhen Li
- School of Biological Engineering, Dalian Polytechnic University, Dalian, 116034, China
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33
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Wells-Bennik MH, Eijlander RT, den Besten HM, Berendsen EM, Warda AK, Krawczyk AO, Nierop Groot MN, Xiao Y, Zwietering MH, Kuipers OP, Abee T. Bacterial Spores in Food: Survival, Emergence, and Outgrowth. Annu Rev Food Sci Technol 2016; 7:457-82. [DOI: 10.1146/annurev-food-041715-033144] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marjon H.J. Wells-Bennik
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- NIZO Food Research, 6718 ZB Ede, The Netherlands;
| | - Robyn T. Eijlander
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- NIZO Food Research, 6718 ZB Ede, The Netherlands;
| | - Heidy M.W. den Besten
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Laboratory of Food Microbiology, Wageningen University, 6700 AA Wageningen, The Netherlands
| | - Erwin M. Berendsen
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- NIZO Food Research, 6718 ZB Ede, The Netherlands;
- Molecular Genetics Department, University of Groningen, 9700 AB Groningen, The Netherlands
| | - Alicja K. Warda
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Laboratory of Food Microbiology, Wageningen University, 6700 AA Wageningen, The Netherlands
- Wageningen UR Food & Biobased Research, 6700 AA Wageningen, The Netherlands
| | - Antonina O. Krawczyk
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Molecular Genetics Department, University of Groningen, 9700 AB Groningen, The Netherlands
| | - Masja N. Nierop Groot
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Wageningen UR Food & Biobased Research, 6700 AA Wageningen, The Netherlands
| | - Yinghua Xiao
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Laboratory of Food Microbiology, Wageningen University, 6700 AA Wageningen, The Netherlands
| | - Marcel H. Zwietering
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Laboratory of Food Microbiology, Wageningen University, 6700 AA Wageningen, The Netherlands
| | - Oscar P. Kuipers
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Molecular Genetics Department, University of Groningen, 9700 AB Groningen, The Netherlands
| | - Tjakko Abee
- TI Food and Nutrition, 6700 AN Wageningen, The Netherlands
- Laboratory of Food Microbiology, Wageningen University, 6700 AA Wageningen, The Netherlands
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Gopal N, Hill C, Ross PR, Beresford TP, Fenelon MA, Cotter PD. The Prevalence and Control of Bacillus and Related Spore-Forming Bacteria in the Dairy Industry. Front Microbiol 2015; 6:1418. [PMID: 26733963 PMCID: PMC4685140 DOI: 10.3389/fmicb.2015.01418] [Citation(s) in RCA: 147] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 11/30/2015] [Indexed: 01/14/2023] Open
Abstract
Milk produced in udder cells is sterile but due to its high nutrient content, it can be a good growth substrate for contaminating bacteria. The quality of milk is monitored via somatic cell counts and total bacterial counts, with prescribed regulatory limits to ensure quality and safety. Bacterial contaminants can cause disease, or spoilage of milk and its secondary products. Aerobic spore-forming bacteria, such as those from the genera Sporosarcina, Paenisporosarcina, Brevibacillus, Paenibacillus, Geobacillus and Bacillus, are a particular concern in this regard as they are able to survive industrial pasteurization and form biofilms within pipes and stainless steel equipment. These single or multiple-species biofilms become a reservoir of spoilage microorganisms and a cycle of contamination can be initiated. Indeed, previous studies have highlighted that these microorganisms are highly prevalent in dead ends, corners, cracks, crevices, gaskets, valves and the joints of stainless steel equipment used in the dairy manufacturing plants. Hence, adequate monitoring and control measures are essential to prevent spoilage and ensure consumer safety. Common controlling approaches include specific cleaning-in-place processes, chemical and biological biocides and other novel methods. In this review, we highlight the problems caused by these microorganisms, and discuss issues relating to their prevalence, monitoring thereof and control with respect to the dairy industry.
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Affiliation(s)
- Nidhi Gopal
- Teagasc Food Research CentreCork, Ireland
- School of Microbiology, University College CorkCork, Ireland
| | - Colin Hill
- School of Microbiology, University College CorkCork, Ireland
- APC Microbiome InstituteCork, Ireland
| | - Paul R. Ross
- College of Science, Engineering and Food Science, University College CorkCork, Ireland
| | | | | | - Paul D. Cotter
- Teagasc Food Research CentreCork, Ireland
- APC Microbiome InstituteCork, Ireland
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35
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Guisado IM, Purswani J, González-López J, Pozo C. Paenibacillus etheri sp. nov., able to grow on media supplemented with methyl tert-butyl ether (MTBE) and isolated from hydrocarbon-contaminated soil. Int J Syst Evol Microbiol 2015; 66:862-867. [PMID: 26611534 DOI: 10.1099/ijsem.0.000802] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A bacterial strain, designated SH7T, was isolated from the hydrocarbon-contaminated soil of a pilot plant (Granada, Spain). The strain was selected for its capacity to grow in media supplemented with methyl tert-butyl ether (MTBE) as sole energy and carbon source. Strain SH7T was a Gram-stain-positive, facultatively anaerobic, spore-forming, rod-shaped bacterium. Phylogenetic analysis using 16S rRNA gene sequences showed that strain SH7T belongs to a cluster comprising species of the genus Paenibacillus and was closely related to Paenibacillus borealis KK19T (97 % 16S rRNA gene sequence similarity) and Paenibacillus odorifer TOD45T (98 %). DNA-DNA hybridization tests showed low relatedness of strain SH7T with the type strains of Paenibacillus borealis (16.9 ± 1.5 %) and Paenibacillus odorifer (16.6 ± 2.1 %). The cell wall of strain SH7T contained meso-diaminopimelic acid. The predominant respiratory quinone was MK-7, and anteiso-C15 : 0 (32.9 %) and C16 : 0 (29.0 %) were the predominant cellular fatty acids. Phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol and three unknown aminophospholipids were the major phospholipids. The DNA G+C content was 44.3 mol%. Data obtained in this study indicate that strain SH7T represents a novel species of the genus Paenibacillus, for which the name Paenibacillus etheri sp. nov. is proposed. The type strain is SH7T ( = CECT 8558T = DSM 29760T).
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Affiliation(s)
- Isabel M Guisado
- Environmental Microbiology Group, Institute of Water Research, University of Granada, C/ Ramón y Cajal, n°4, 18071, Granada, Spain.,Department of Microbiology, Faculty of Sciences, University of Granada, Granada, Spain
| | - Jessica Purswani
- Environmental Microbiology Group, Institute of Water Research, University of Granada, C/ Ramón y Cajal, n°4, 18071, Granada, Spain.,Department of Microbiology, Faculty of Sciences, University of Granada, Granada, Spain
| | - Jesús González-López
- Environmental Microbiology Group, Institute of Water Research, University of Granada, C/ Ramón y Cajal, n°4, 18071, Granada, Spain.,Department of Microbiology, Faculty of Sciences, University of Granada, Granada, Spain
| | - Clementina Pozo
- Department of Microbiology, Faculty of Sciences, University of Granada, Granada, Spain.,Environmental Microbiology Group, Institute of Water Research, University of Granada, C/ Ramón y Cajal, n°4, 18071, Granada, Spain
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37
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Clermont D, Gomard M, Hamon S, Bonne I, Fernandez JC, Wheeler R, Malosse C, Chamot-Rooke J, Gribaldo S, Boneca IG, Bizet C. Paenibacillus faecis sp. nov., isolated from human faeces. Int J Syst Evol Microbiol 2015; 65:4621-4626. [PMID: 26394885 DOI: 10.1099/ijsem.0.000622] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A spore-forming, rod-shaped Gram-strain-positive bacterium, strain 656.84T, was isolated from human faeces in 1984. It contained anteiso-C15 : 0 as the major cellular fatty acid, meso-diaminopimelic acid was found in the cell wall peptidoglycan, the polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and aminophospholipids as the major components, and the predominant menaquinone was MK-7. The DNA G+C content was 52.9 mol%. The results of comparative 16S rRNA gene sequence studies placed strain 656.84T within the genus Paenibacillus. Its closest phylogenetic relatives were Paenibacillus barengoltzii and Paenibacillus timonensis. Levels of DNA-DNA relatedness between strain 656.84T and Paenibacillus timonensis CIP 108005T and Paenibacillus barengoltzii CIP 109354T were 17.3 % and 36.8 %, respectively, indicating that strain 656.84T represents a distinct species. On the basis of phenotypic and genotypic results, strain 656.84T is considered to represent a novel species within the genus Paenibacillus, for which the name Paenibacillus faecis sp. nov. is proposed; the type strain is 656.84T ( = DSM 23593T = CIP 101062T).
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Affiliation(s)
- Dominique Clermont
- Département de Microbiologie F-75015, Institut Pasteur, Collection de l'Institut Pasteur, Paris, France
| | - Maïté Gomard
- Département de Microbiologie F-75015, Institut Pasteur, Collection de l'Institut Pasteur, Paris, France
| | - Sylviane Hamon
- Département de Microbiologie F-75015, Institut Pasteur, Collection de l'Institut Pasteur, Paris, France
| | - Isabelle Bonne
- Institut Pasteur, Plate-Forme de Microscopie Ultrastructurale - Imagopole, F-75015, Paris, France
| | - José-Carlos Fernandez
- Département de Microbiologie F-75015, Institut Pasteur, Collection de l'Institut Pasteur, Paris, France
| | - Richard Wheeler
- Département de Microbiologie, F-75015 Paris, France; INSERM, équipe Avenir, Institut Pasteur, Unité de Biologie et Génétique de la Paroi Bactérienne, Paris, France
| | - Christian Malosse
- Institut Pasteur, Unité de Spectrométrie de Masse Structurale et Protéomique - Protéopole, F-75015, Paris, France
| | - Julia Chamot-Rooke
- Institut Pasteur, Unité de Spectrométrie de Masse Structurale et Protéomique - Protéopole, F-75015, Paris, France
| | - Simonetta Gribaldo
- Département de Microbiologie, F-75015, Institut Pasteur, Unité de Recherche Biologie Moléculaire du Gène chez les Extrêmophiles, Paris, France
| | - Ivo Gomperts Boneca
- Département de Microbiologie, F-75015 Paris, France; INSERM, équipe Avenir, Institut Pasteur, Unité de Biologie et Génétique de la Paroi Bactérienne, Paris, France
| | - Chantal Bizet
- Département de Microbiologie F-75015, Institut Pasteur, Collection de l'Institut Pasteur, Paris, France.,Département de Microbiologie F-75015, Institut Pasteur, CRBIP - Centre de Ressources Biologiques de l'Institut Pasteur, Paris, France
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Liu Y, Zhai L, Wang R, Zhao R, Zhang X, Chen C, Cao Y, Cao Y, Xu T, Ge Y, Zhao J, Cheng C. Paenibacillus zeae sp. nov., isolated from maize (Zea mays L.) seeds. Int J Syst Evol Microbiol 2015; 65:4533-4538. [PMID: 26373452 DOI: 10.1099/ijsem.0.000608] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Four Gram-stain-positive bacterial strains, designated 6R2T, 6R18, 3T2 and 3T10, isolated from seeds of hybrid maize (Zea mays L., Jingke 968) were investigated using a polyphasic taxonomic approach. Cells were aerobic, motile, spore-forming and rod-shaped. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the isolates may represent a novel species of the genus Paenibacillus, the four closest neighbours being Paenibacillus lautus NRRL NRS-666T (97.1 % similarity), Paenibacillus glucanolyticus DSM 5162T (97.0 %), Paenibacillus lactis MB 1871T (97.0 %) and Paenibacillus chibensis JCM 9905T (96.8 %). The DNA G+C content of strain 6R2T was 51.8 mol%. Its polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The predominant respiratory quinone was menaquinone 7 (MK-7) and the major fatty acids were anteiso-C15 : 0 and iso-C14 : 0. Strains 6R2T, 6R18, 3T2 and 3T10 were clearly distinguished from the above type strains using phylogenetic analysis, DNA-DNA hybridization, and a range of physiological and biochemical characteristics. It is evident from the genotypic and phenotypic data that strains 6R2T, 6R18, 3T2 and 3T10 represent a novel species of the genus Paenibacillus, for which the name Paenibacillus zeae sp. nov. is proposed. The type strain is 6R2T ( = KCTC 33674T = CICC 23860T).
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Affiliation(s)
- Yang Liu
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China.,Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, PR China
| | - Lei Zhai
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Ronghuan Wang
- Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, PR China
| | - Ran Zhao
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Xin Zhang
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Chuanyong Chen
- Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, PR China
| | - Yu Cao
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Yanhua Cao
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Tianjun Xu
- Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, PR China
| | - Yuanyuan Ge
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
| | - Jiuran Zhao
- Maize Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100097, PR China
| | - Chi Cheng
- China Center of Industrial Culture Collection (CICC), China National Research Institute of Food and Fermentation Industries, Beijing 100015, PR China
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Zhang L, Gao JS, Zhang S, Ali Sheirdil R, Wang XC, Zhang XX. Paenibacillus rhizoryzae sp. nov., isolated from rice rhizosphere. Int J Syst Evol Microbiol 2015; 65:3053-3059. [DOI: 10.1099/ijs.0.000376] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-positive, endospore-forming, rod-shaped bacterium, designated 1ZS3-5T, was isolated from rice rhizosphere in Hunan Province, PR China. The isolate was identified as a member of the genus Paenibacillus on the basis of phenotypic characteristics and phylogenetic inference analysis. The 16S rRNA and rpoB gene (β-subunit of bacterial RNA polymerase) sequences were closely related to those of Paenibacillus taihuensis CGMCC 1.10966T with similarities of 97.2 % and 89.7 %, respectively. The DNA–DNA hybridization value between 1ZS3-5T and P. taihuensis CGMCC 1.10966T was 33.4 %. The DNA G+C content of 1ZS3-5T was 47.5 mol%. The major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, unidentified aminophospholipid and unknown phospholipid. The predominant respiratory quinone was MK-7. The diamino acid found in the cell-wall peptidoglycan was meso-diaminopimelic acid. The major cellular fatty acids were anteiso-C15 : 0, iso-C15 : 0 and iso-C16 : 0. Based on these results, 1ZS3-5T is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus rhizoryzae sp. nov. is proposed. The type strain is 1ZS3-5T ( = ACCC 19782T = DSM 29322T).
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Affiliation(s)
- Lei Zhang
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Ju-Sheng Gao
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
- Qiyang Agro-ecosystem of National Field Experimental Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Qiyang 426182, PR China
| | - Shuang Zhang
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Rizwan Ali Sheirdil
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
- Department of Soil Science and Soil Water Conservation, PMAS Arid Agriculture University, Rawalpindi, Pakistan
| | - Xiu-Cheng Wang
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
| | - Xiao-Xia Zhang
- Key Laboratory of Microbial Resources Collection and Preservation, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
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Zhou X, Nan Guo G, Qi Wang L, Lan Bai S, Li Li C, Yu R, Hong Li Y. Paenibacillus physcomitrellae sp. nov., isolated from the moss Physcomitrella patens. Int J Syst Evol Microbiol 2015; 65:3400-3406. [PMID: 26296580 DOI: 10.1099/ijsem.0.000428] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-positive, facultatively anaerobic and rod-shaped bacterium, designated strain XBT, was isolated from Physcomitrella patens growing in Beijing, China. The isolate was identified as a member of the genus Paenibacillus based on phenotypic characteristics and phylogenetic inferences. The novel strain was spore-forming, motile, catalase-negative and weakly oxidase-positive. Optimal growth of strain XBT occurred at 28°C and pH 7.0-7.5. The major polar lipids contained diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and several unidentified components, including one phospholipid, two aminophospholipids, three glycolipids, one aminolipid and one lipid. The predominant isoprenoid quinone was MK-7. The diamino acid found in the cell-wall peptidoglycan was meso-diaminopimelic acid. The major fatty acid components (>5 %) were anteiso-C15 : 0 (51.2 %), anteiso-C17 : 0 (20.6 %), iso-C16 : 0 (8.3 %) and C16 : 0 (6.7 %). The G+C content of the genomic DNA was 53.3 mol%. Phylogenetic analysis, based on the 16S rRNA gene sequence, showed that strain XBT fell within the evolutionary distances encompassed by the genus Paenibacillus; its closest phylogenetic neighbour was Paenibacillus yonginensis DCY84T (96.6 %). Based on phenotypic, chemotaxonomic and phylogenetic properties, strain XBT is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus physcomitrellae sp. nov., is proposed. The type strain is XBT ( = CGMCC 1.15044T = DSM 29851T).
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Affiliation(s)
- Xun Zhou
- College of Life Science, Capital Normal University, Beijing 100048, PR China
| | - Guan Nan Guo
- College of Life Science, Capital Normal University, Beijing 100048, PR China
| | - Le Qi Wang
- College of Life Science, Capital Normal University, Beijing 100048, PR China
| | - Su Lan Bai
- College of Life Science, Capital Normal University, Beijing 100048, PR China
| | - Chun Li Li
- New Technique Centre, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
| | - Rong Yu
- College of Life Science, Capital Normal University, Beijing 100048, PR China
| | - Yan Hong Li
- College of Life Science, Capital Normal University, Beijing 100048, PR China
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Yin J, He D, Li X, Zeng X, Tian M, Cheng G. Paenibacillus enshidis sp. nov., Isolated from the Nodules of Robinia pseudoacacia L. Curr Microbiol 2015; 71:321-5. [PMID: 26063444 DOI: 10.1007/s00284-015-0854-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Accepted: 05/01/2015] [Indexed: 10/23/2022]
Abstract
A Gram-positive, motile, endospore-forming, rod-shaped bacterium, designated RP-207(T), was isolated from the nodules of Robinia pseudoacacia L. plants planted in Enshi District, Hubei, PR China. Phylogenetic analyses based on the 16S rRNA gene sequence showed that the novel strain was affiliated to the genus Paenibacillus, with its closest relatives being Paenibacillus xylanilyticus XIL14(T) (95.6%), Paenibacillus peoriae DSM8320(T) (95.3%) and Paenibacillus polymyxa DSM 36(T) (95.3%). The DNA G+C content was 47.0 mol%. DNA-DNA hybridization value between strain RP-207(T) and P. xylanilyticus XIL14(T) was 40.1%. The diamino acid found in the cell wall peptidoglycan was meso-diaminopimelic. The major polar lipids were phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol, an unidentified amino-phospholipid and an unknown phospholipid. The predominant menaquinone was menaquinone-7 (MK-7), and the major fatty acid was anteiso-C15:0 and C16:0. On the basis of its physiological and biochemical characteristics and the level of DNA-DNA hybridization, strain RP-207(T) is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus enshidis sp. nov. is proposed. The type strain is RP-207(T) (=CCTCC AB 2013275(T) = KCTC 33519(T)).
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Affiliation(s)
- Jie Yin
- College of Life Science, South-Central University for Nationalities, Wuhan, 430074, China
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Chen L, Wang L, Sheng XF. Paenibacillus qingshengii sp. nov., isolated from a lead-zinc tailing. Int J Syst Evol Microbiol 2015; 65:2161-2166. [PMID: 25858246 DOI: 10.1099/ijs.0.000232] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel bacterial strain, S1-9(T), was isolated from a lead-zinc tailing in Nanjing, Jiangsu Province, China. Cells of strain S1-9(T) were Gram-stain-negative, ellipsoidal endospore-forming, aerobic rods and motile by means of peritrichous flagella. On the basis of 16S rRNA gene sequence analysis, strain S1-9(T) was shown to belong to the genus Paenibacillus and the closest phylogenetic relatives were Paenibacillus glucanolyticus DSM 5162(T) (96.8% similarity), Paenibacillus lautus NRRL NRS-666(T) (96.5%) and Paenibacillus lactis MB 1871(T) (95.4%). The predominant menaquinone was MK-7. The major cellular fatty acids were anteiso-C15:0 and iso-C16:0. The polar lipid profile contained phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol, two unknown phospholipids and two unknown lipids. The total DNA G+C content of strain S1-9(T) was 49.9 mol%. Based on the low levels of DNA-DNA relatedness (ranging from 21.8 to 48.4%) to the type strains of the above species of the genus Paenibacillus and unique phenotypic characteristics, strain S1-9(T) is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus qingshengii sp. nov. is proposed. The type strain is S1-9(T) ( = CCTCC AB 2014290(T) = JCM 30613(T)).
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Affiliation(s)
- Ling Chen
- Key Laboratory of Agricultural Environment Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Lu Wang
- Key Laboratory of Agricultural Environment Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xia-Fang Sheng
- Key Laboratory of Agricultural Environment Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, PR China
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Jiang B, Zhao X, Liu J, Fu L, Yang C, Hu X. Paenibacillus shenyangensis sp. nov., a bioflocculant-producing species isolated from soil under a peach tree. Int J Syst Evol Microbiol 2015; 65:220-224. [DOI: 10.1099/ijs.0.060483-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-positive, aerobic or facultatively anaerobic, rod-shaped, non-motile, endospore-forming bacterium, strain A9T, was isolated in 1996 from a soil sample collected under a peach tree in Qingnian Park in Shenyang, PR China, and its taxonomic position was investigated using a polyphasic approach. Phylogenetic analysis based on 16S rRNA gene sequences showed that the strain belonged to the genus
Paenibacillus
, and was most closely related to the type strain of
Paenibacillus hunanensis
with a 16S rRNA gene sequence similarity of 96.7 % and a DNA–DNA relatedness value of 51.6 %. The major polar lipids of strain A9T were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The predominant menaquinone was MK-7 and the major cellular fatty acids were anteiso-C15 : 0, C16 : 0 and iso-C15 : 0. The DNA G+C content was 51.9 mol%. Based on these results, it is concluded that strain A9T represents a novel species of the genus
Paenibacillus
, for which the name Paenibacillus shenyangensis sp. nov. is proposed, with A9T ( = JCM 19307T = CGMCC 2040T) as the type strain.
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Affiliation(s)
- Binhui Jiang
- College of Resource & Civil Engineering, Northeastern University, Shenyang 110004, PR China
| | - Xin Zhao
- College of Resource & Civil Engineering, Northeastern University, Shenyang 110004, PR China
| | - Jinliang Liu
- College of Resource & Civil Engineering, Northeastern University, Shenyang 110004, PR China
| | - Lili Fu
- College of Resource & Civil Engineering, Northeastern University, Shenyang 110004, PR China
| | - Chengcheng Yang
- College of Resource & Civil Engineering, Northeastern University, Shenyang 110004, PR China
| | - Xiaomin Hu
- College of Resource & Civil Engineering, Northeastern University, Shenyang 110004, PR China
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Huq MA, Kim YJ, Hoang VA, Siddiqi MZ, Yang DC. Paenibacillus ginsengiterrae sp. nov., a ginsenoside-hydrolyzing bacteria isolated from soil of ginseng field. Arch Microbiol 2014; 197:389-96. [PMID: 25516431 DOI: 10.1007/s00203-014-1073-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 12/05/2014] [Accepted: 12/06/2014] [Indexed: 11/24/2022]
Abstract
A novel bacterial strain DCY89(T) was isolated from soil sample of ginseng field and was characterized using a polyphasic approach. Cells were Gram-reaction-positive, rod-shaped, spore-forming and motile with flagella. The strain was aerobic, esculin and starch positive, catalase- and oxidase-negative, optimum growth temperature, and pH were 25-30 °C and 6.0-7.5, respectively. On the basis of 16S rRNA gene sequence analysis, strain DCY89(T) was shown to belong to the genus Paenibacillus and the closest phylogenetic relatives were Paenibacillus cellulosilyticus KACC 14175(T) (98.2%), Paenibacillus kobensis KACC 15273(T) (98.1%), Paenibacillus xylaniclasticus KCTC 13719(T) (96.9%), and Paenibacillus curdlanolyticus KCTC 3759(T) (96.64%). The DNA G+C content was 52.5 mol%, and the predominant respiratory quinone was MK-7. The major fatty acids were iso-C15:0, iso-C16:0, and anteiso-C15:0. The major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, and phosphatidylglycerol. The results of the genotypic analysis in combination with chemotaxonomic and physiological data demonstrated that DCY89(T) represented a novel species within the genus Paenibacillus, for which we propose the name Paenibacillus ginsengiterrae. The type strain is DCY89(T) (JCM 19887(T) = KCTC 33430(T)).
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Affiliation(s)
- Md Amdadul Huq
- Graduate School of Biotechnology and Ginseng Bank, College of Life Science, Kyung Hee University, Seocheon-dong, Giheung-gu, Yongin-Si, Gyeonggi-do, 446-701, Republic of Korea
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Simonová MP, Kmeť V, Lauková A. Occurrence and characterization of Paenibacillus sp. isolated from rabbits. Folia Microbiol (Praha) 2014; 60:97-101. [PMID: 25231136 DOI: 10.1007/s12223-014-0345-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 09/04/2014] [Indexed: 11/29/2022]
Affiliation(s)
- Monika Pogány Simonová
- Institute of Animal Physiology, Slovak Academy of Sciences, Šoltésovej 4-6, 040 01, Košice, Slovakia,
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Son JS, Kang HU, Ghim SY. Paenibacillus dongdonensis sp. nov., isolated from rhizospheric soil of Elymus tsukushiensis. Int J Syst Evol Microbiol 2014; 64:2865-2870. [PMID: 24871779 DOI: 10.1099/ijs.0.061077-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-staining-positive, endospore-forming and rod-shaped bacterial strain, designated KUDC0114(T), was isolated from rhizospheric soil of Elymus tsukushiensis from Dongdo Island, one of the largest of the Dokdo Islands, South Korea. The strain displayed optimal growth at 37 °C, pH 8.5 in the absence of NaCl. Based on phylogenetic analysis of 16S rRNA gene sequences, strain KUDC0114(T) represented a member of the genus Paenibacillus and was most closely related to Paenibacillus taichungensis BCRC 17757(T) (98.46%). The cell-wall peptidoglycan was A1γ type, and the predominant quinone was menaquinone-7 (MK-7). The major cellular fatty acids were anteiso-C(15 : 0) and C(16 : 0). The DNA-DNA hybridization of strain KUDC0114(T) with nine other strains indicated less than 23% relatedness, and its DNA G+C content was 44.30 mol%. Based on genomic, phenotypic and phylogenetic analyses, KUDC0114(T) should be classified as representing novel species within the genus Paenibacillus. The name Paenibacillus dongdonensis sp. nov. is proposed. The type strain is KUDC0114(T) ( = DSM27607(T) = KCTC33221(T)).
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Affiliation(s)
- Jin-Soo Son
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Hyun-Uk Kang
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Sa-Youl Ghim
- School of Life Sciences and Biotechnology, Kyungpook National University, Daegu 702-701, Republic of Korea
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Moon J, Kim J. Isolation of Paenibacillus pinesoli sp. nov. from forest soil in Gyeonggi-Do, Korea. J Microbiol 2014; 52:273-7. [PMID: 24682991 DOI: 10.1007/s12275-014-3622-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 02/21/2014] [Accepted: 02/24/2014] [Indexed: 10/25/2022]
Abstract
Using a new culture method for unculturable soil bacteria, strain NB5(T) was isolated from forest soil at Kyonggi University, and characterized taxonomically on the basis of 16S rRNA gene sequence as well as phenotypic and chemotaxonomic characteristics. The novel strain was a Gram- and catalase-positive, rod-shaped bacterium, which grew in the pH range 6.0-9.5 (optimum, 6.5-9.5) and at temperatures between 15°C and 45°C (optimum, 25-40°C). Growth was possible at 0-5% NaCl (optimum, 0% to 3%) in nutrient, Luria-Bertani, and trypticase soy broths (TSB), as well as R2A medium (with optimal growth in TSB). A phylogenetic analysis of the 16S rRNA gene sequence showed that the novel strain was affiliated with the genus Paenibacillus and had 96.8% and 96.5% similarity to P. nanensis MX2-3(T) and P. agaridevorans DSM 1355(T), respectively. The predominant menaquinone in NB5(T) was MK-7; the major fatty acids were anteiso-C15:0 and iso-C16:0; and the DNA G+C content was 54.5 mol%. We propose this strain as a novel species of the genus Paenibacillus, and suggest the name Paenibacillus pinesoli sp. nov. (type strain, KACC 17472(T)=KEMB 9005-025(T)=JCM 19203(T)).
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Affiliation(s)
- Jeongsuk Moon
- Department of Life Science, College of Natural Sciences, Kyonggi University, Suwon, 443-760, Republic of Korea
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Heat treatment induced bacterial changes in irrigation water and their implications for plant disease management. World J Microbiol Biotechnol 2013; 30:1591-601. [PMID: 24343781 DOI: 10.1007/s11274-013-1583-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Accepted: 12/12/2013] [Indexed: 10/25/2022]
Abstract
A new heat treatment for recycled irrigation water using 48 °C for 24 h to inactivate Phytophthora and bacterial plant pathogens is estimated to reduce fuel cost and environmental footprint by more than 50 % compared to current protocol (95 °C for 30 s). The objective of this study was to determine the impact of this new heat treatment temperature regime on bacterial community structure in water and its practical implications. Bacterial communities in irrigation water were analyzed before and after heat treatment using both culture-dependent and -independent strategies based on the 16S ribosomal DNA. A significant shift was observed in the bacterial community after heat treatment. Most importantly, bacteria with biological control potential--Bacillus and Paenibacillus, and Pseudomonas species became more abundant at both 48 and 42 °C. These findings imply that the new heat treatment procedure not only controls existing plant pathogens but also may make the heat-treated irrigation water a more antagonistic environment against plant pathogens, promoting sustainable disease management.
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Aouadhi C, Maaroufi A, Mejri S. Incidence and characterisation of aerobic spore-forming bacteria originating from dairy milk in Tunisia. INT J DAIRY TECHNOL 2013. [DOI: 10.1111/1471-0307.12088] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chedia Aouadhi
- Laboratory of Epidemiology and Microbiology; Bacteriology and Biotechnology development Groups; Pasteur Institute of Tunisia (IPT); University Manar; BP 74 13 place Pasteur Belvédère 1002 Tunis Tunisia
- Laboratory of Animal Resources and Food Technology; National Institute of Agronomy Tunis (INAT); University Carthage; 43 Rue Charles Nicole Cité Mahrajène Le Belvédère 1082 Tunis Tunisia
| | - Abderrazak Maaroufi
- Laboratory of Epidemiology and Microbiology; Bacteriology and Biotechnology development Groups; Pasteur Institute of Tunisia (IPT); University Manar; BP 74 13 place Pasteur Belvédère 1002 Tunis Tunisia
| | - Slah Mejri
- Laboratory of Animal Resources and Food Technology; National Institute of Agronomy Tunis (INAT); University Carthage; 43 Rue Charles Nicole Cité Mahrajène Le Belvédère 1082 Tunis Tunisia
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