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Bacillus amyloliquefaciens

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https://www.readbyqxmd.com/read/28647117/isolation-of-a-potential-biocontrol-agent-paenibacillus-polymyxa-nsy50-from-vinegar-waste-compost-and-its-induction-of-host-defense-responses-against-fusarium-wilt-of-cucumber
#1
Nanshan Du, Lu Shi, Yinghui Yuan, Jin Sun, Sheng Shu, Shirong Guo
Fusarium wilt caused by Fusarium oxysporum f. sp. cucumerinum (FOC) is one of the major destructive soil-borne diseases infecting cucumber. In this study, we screened 60 target strains isolated from vinegar waste compost, from which 10 antagonistic strains were identified to have the disease suppression capacity of bio-control agents. The 16S rDNA gene demonstrated that the biocontrol agents were Paenibacillus polymyxa (P. polymyxa), Bacillus amyloliquefaciens (B. amyloliquefaciens) and Bacillus licheniformis (B...
September 2017: Microbiological Research
https://www.readbyqxmd.com/read/28613417/batch-batch-stable-microbial-community-in-the-traditional-fermentation-process-of-huyumei-broad-bean-pastes
#2
Linjiang Zhu, Zihao Fan, Hui Kuai, Qi Li
During natural fermentation processes, a characteristic microbial community structure (MCS) is naturally formed, and it is interesting to know about its batch-batch stability. This issue was explored in a traditional semi-solid-state fermentation process of huyumei, a Chinese broad bean paste product. The results showed that this MCS mainly contained four aerobic Bacillus species (8 Log cfu g(-1) ), including B. subtilis, B. amyloliquefaciens, B. methylotrophicus, and B. tequilensis, and the facultative anaerobe B...
June 14, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/28600796/efficacy-of-bacillus-amyloliquefaciens-as-biocontrol-agent-to-fight-fungal-diseases-of-maize-under-tropical-climates-from-lab-to-field-assays-in-south-kivu
#3
Parent Zihalirwa Kulimushi, Géant Chuma Basime, Gustave Mushagalusa Nachigera, Philippe Thonart, Marc Ongena
In the province of South Kivu (Democratic Republic of Congo), warm and humid climatic conditions favor the development and spreading of phytopathogens. The resulting diseases cause important losses in production both in crop and after harvest. In this study, we wanted to evaluate the potential of Bacillus amyloliquefaciens as biocontrol agent to fight some newly isolated endemic fungal pathogens infesting maize. The strain S499 has been selected based on its high in vitro antagonistic activity correlating with a huge potential to secrete fungitoxic lipopeptides upon feeding on maize root exudates...
June 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28588570/the-profile-and-antimicrobial-activity-of-bacillus-lipopeptide-extracts-of-five-potential-biocontrol-strains
#4
Ivica Dimkić, Slaviša Stanković, Marija Nišavić, Marijana Petković, Petar Ristivojević, Djordje Fira, Tanja Berić
In this study the efficacy of two different methods for extracting lipopeptides produced by five Bacillus strains-ethyl acetate extraction, and acid precipitation followed by methanol extraction-was investigated using mass spectrometry. High performance thin layer chromatography (HPTLC) was also used for the simultaneous separation of complex mixtures of lipopeptide extracts and for the determination of antimicrobial activity of their components. The mass spectra clearly showed well-resolved groups of peaks corresponding to different lipopeptide families (kurstakins, iturins, surfactins, and fengycins)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28587617/construction-of-energy-conserving-sucrose-utilization-pathways-for-improving-poly-%C3%AE-glutamic-acid-production-in-bacillus-amyloliquefaciens
#5
Jun Feng, Yanyan Gu, Yufen Quan, Weixia Gao, Yulei Dang, Mingfeng Cao, Xiaoyun Lu, Yi Wang, Cunjiang Song, Shufang Wang
BACKGROUND: Sucrose is an naturally abundant and easily fermentable feedstock for various biochemical production processes. By now, several sucrose utilization pathways have been identified and characterized. Among them, the pathway consists of sucrose permease and sucrose phosphorylase is an energy-conserving sucrose utilization pathway because it consumes less ATP when comparing to other known pathways. Bacillus amyloliquefaciens NK-1 strain can use sucrose as the feedstock to produce poly-γ-glutamic acid (γ-PGA), a highly valuable biopolymer...
June 6, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28585422/menaquinone-7-production-from-maize-meal-hydrolysate-by-bacillus-isolates-with-diphenylamine-and-analogue-resistance
#6
Jian-Zhong Xu, Wei-Guo Zhang
A menaquinone-7 (MK-7) high-producing strain needs to be isolated to increase MK-7 production, in order to meet a requirement of MK-7 given the low MK-7 content in food products. This article focuses on developing MK-7 high-producing strains via screening and mutagenesis by an atmospheric and room temperature plasma (ARTP) mutation breeding system. We isolated an MK-7-producing strain Y-2 and identified it as Bacillus amyloliquefaciens, which produced (7.1±0.5) mg/L of MK-7 with maize meal hydrolysate as carbon source...
June 2017: Journal of Zhejiang University. Science. B
https://www.readbyqxmd.com/read/28583081/addition-of-plant-growth-promoting-bacillus-subtilis-pts-394-on-tomato-rhizosphere-has-no-durable-impact-on-composition-of-root-microbiome
#7
Junqing Qiao, Xiang Yu, Xuejie Liang, Yongfeng Liu, Rainer Borriss, Youzhou Liu
BACKGROUND: Representatives of the genus Bacillus are increasingly used in agriculture to promote plant growth and to protect against plant pathogens. Unfortunately, hitherto the impact of Bacillus inoculants on the indigenous plant microbiota has been investigated exclusively for the species Bacillus amyloliquefaciens and was limited to prokaryotes, whilst eukaryotic member of this community, e.g. fungi, were not considered. RESULTS: The root-colonizing Bacillus subtilis PTS-394 supported growth of tomato plants and suppressed soil-borne diseases...
June 5, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28578227/evaluating-the-feasibility-of-fermentation-starter-inoculated-with-bacillus-amyloliquefaciens-for-improving-acetoin-and-tetramethylpyrazine-in-baoning-bran-vinegar
#8
Liqiang Zhang, Jun Huang, Rongqing Zhou, Chongde Wu
Fermentation starters (Daqu) used in present study included traditional herb Daqu (C Daqu), modified Daqu without herbs (M Daqu) and S Daqu fermented by inoculating acetoin and tetramethylpyrazine high-producing bacterium Bacillus amyloliquefaciens into M Daqu. To evaluate the feasibility of S Daqu combined with M Daqu applied for improving contents of acetoin and tetramethylpyrazine in Baoning bran vinegar without remarkably changing the original microbial community and the other volatiles contents compared with C Daqu, vinegar Pei C, M, M1, M2 and S were correspondingly prepared in lab scale using C Daqu, M Daqu, M1 Daqu (S Daqu: M Daqu=1:9, w/w), M2 Daqu (S Daqu: M Daqu=5:5) and S Daqu...
May 27, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28577516/improvement-of-bacillus-strains-by-mutation-for-overproduction-of-exopolygalacturonases
#9
Hira Muzzamal, Zakia Latif
Pectinases, produced by microorganisms, have wide range application in food industry, textile processing, paper making, coffee and tea fermentation, etc. It accounts for 10% of the global industrial enzymes produced. The most important and widely used commercial pectinase polygalacturonase is produced by alkalophilic strains of Bacillus sp. and Streptomyces sp. Here, we explored 29 bacterial strains isolated from rotten mango samples for polygalacturonase production and selected 16 strains through preliminary screening by well-plate method for enzyme activity...
August 2016: Indian Journal of Experimental Biology
https://www.readbyqxmd.com/read/28574306/impact-of-mannanase-producing-bacillus-spp-on-the-accuracy-of-the-3m-petrifilm-aerobic-count-method
#10
Guoping Feng, Amanda Hew, Ramesh Manoharan, Siva Subramanian
Consistent deviations of the 3M Petrifilm aerobic counts (AC) from the standard pour plate aerobic plate count (APC) were observed with dehydrated onion and garlic products. A large study was designed to determine the relationship of these two methods and the root cause for the deviations. A total of 3,800 dehydrated onion and garlic samples were analyzed by both the Petrifilm AC and the standard pour plate APC method. Large spreader-like liquefied areas were observed on numerous Petrifilm plates. These liquefied areas made enumeration inaccurate...
June 2, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28571307/variants-of-lipopeptides-and-glycolipids-produced-by-bacillus-amyloliquefaciens-and-pseudomonas-aeruginosa-cultured-in-different-carbon-substrates
#11
Thando Ndlovu, Marina Rautenbach, Sehaam Khan, Wesaal Khan
The quantitative and qualitative effect of water immiscible and miscible carbon-rich substrates on the production of biosurfactants, surfactin and rhamnolipids, by Bacillus amyloliquefaciens ST34 and Pseudomonas aeruginosa ST5, respectively, was analysed. A small-scale high throughput 96 deep-well micro-culture method was utilised to cultivate the two strains in mineral salt medium (MSM) supplemented with the water miscible (glucose, glycerol, fructose and sucrose) and water immiscible carbon sources (diesel, kerosene and sunflower oil) under the same growth conditions...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28571306/characterisation-and-antimicrobial-activity-of-biosurfactant-extracts-produced-by-bacillus-amyloliquefaciens-and-pseudomonas-aeruginosa-isolated-from-a-wastewater-treatment-plant
#12
Thando Ndlovu, Marina Rautenbach, Johann Arnold Vosloo, Sehaam Khan, Wesaal Khan
Biosurfactants are unique secondary metabolites, synthesised non-ribosomally by certain bacteria, fungi and yeast, with their most promising applications as antimicrobial agents and surfactants in the medical and food industries. Naturally produced glycolipids and lipopeptides are found as a mixture of congeners, which increases their antimicrobial potency. Sensitive analysis techniques, such as liquid chromatography coupled to mass spectrometry, enable the fingerprinting of different biosurfactant congeners within a naturally produced crude extract...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28560847/importance-of-prumycin-produced-by-bacillus-amyloliquefaciens-sd-32-in-biocontrol-against-cucumber-powdery-mildew-disease
#13
Keijitsu Tanaka, Mutsumi Fukuda, Yusuke Amaki, Takatoshi Sakaguchi, Koji Inai, Atsushi Ishihara, Hiromitsu Nakajima
BACKGROUND: Powdery mildew disease of cucurbits is caused mainly by Podosphaera fusca, which is one of the most important limiting factors in cucurbit production worldwide. Previously we reported that Bacillus amyloliquefaciens biocontrol strain SD-32 produces C17 bacillomycin D and [Ile(7) ]surfactin, and that these metabolites play important roles in SD-32's biocontrol over cucumber gray mold disease. Our further investigation demonstrated that the culture broth and its supernatant suppressed cucumber powdery mildew disease in greenhouse experiments...
May 30, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28555132/stimulation-of-fengycin-type-antifungal-lipopeptides-in-bacillus-amyloliquefaciens-in-the-presence-of-the-maize-fungal-pathogen-rhizomucor-variabilis
#14
Parent Zihalirwa Kulimushi, Anthony Argüelles Arias, Laurent Franzil, Sébastien Steels, Marc Ongena
Most isolates belonging to the Bacillus amyloliquefaciens subsp. plantarum clade retain the potential to produce a vast array of structurally diverse antimicrobial compounds that largely contribute to their efficacy as biocontrol agents against numerous plant fungal pathogens. In that context, the role of cyclic lipopeptides (CLPs) has been well-documented but still little is known about the impact of interactions with other soil-inhabiting microbes on the expression of these molecules. In this work, we wanted to investigate the antagonistic activity developed by this bacterium against Rhizomucor variabilis, a pathogen isolated from diseased maize cobs in Democratic Republic of Congo...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28545259/identification-of-diacetonamine-from-soybean-curd-residue-as-a-sporulation-inducing-factor-toward-bacillus-spp
#15
Aki Ikeda, Dongyeop Kim, Yasuyuki Hashidoko
Under bioassay-guided investigation, a sporulation-inducing factor (SIF) toward Bacillus spp. was searched for in methanol (MeOH) extracts of soybean curd residues, and diacetonamine (1) was identified as the active compound. SIF was first isolated as a monoacetylated derivative (2, 4.1 mg from 655 g soybean curd residues), and its chemical structure was elucidated by field desorption mass spectrometry, electron ionization mass spectrometry, and nuclear magnetic resonance (NMR) analyses. After 48-h incubation, 40 µM diacetonamine hydrochloride (1b) exhibited sporulation-inducing activity with 35% sporulation frequency toward a Bacillus amyloliquefaciens wild-type strain (AHU 2170), whereas 40 µM diacetone acrylamide (3) showed 99% sporulation induction, which was much higher than that of 1b...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28532451/enhancing-poly-%C3%AE-glutamic-acid-production-in-bacillus-amyloliquefaciens-by-introducing-the-glutamate-synthesis-features-from-corynebacterium-glutamicum
#16
Jun Feng, Yufen Quan, Yanyan Gu, Fenghong Liu, Xiaozhong Huang, Haosheng Shen, Yulei Dang, Mingfeng Cao, Weixia Gao, Xiaoyun Lu, Yi Wang, Cunjiang Song, Shufang Wang
BACKGROUND: Poly-γ-glutamic acid (γ-PGA) is a valuable polymer with glutamate as its sole precursor. Enhancement of the intracellular glutamate synthesis is a very important strategy for the improvement of γ-PGA production, especially for those glutamate-independent γ-PGA producing strains. Corynebacterium glutamicum has long been used for industrial glutamate production and it exhibits some unique features for glutamate synthesis; therefore introduction of these metabolic characters into the γ-PGA producing strain might lead to increased intracellular glutamate availability, and thus ultimate γ-PGA production...
May 22, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/28531554/efficacy-of-bacillus-subtilis-and-bacillus-amyloliquefaciens-in-the-control-of-aspergillus-parasiticus-growth-and-aflatoxins-production-on-pistachio
#17
Fatemeh Siahmoshteh, Ilenia Siciliano, Houda Banani, Zohreh Hamidi-Esfahani, Mehdi Razzaghi-Abyaneh, Maria Lodovica Gullino, Davide Spadaro
Pistachio (Pistacia vera) is an important nut for its economic, nutritional and health aspects but it can be contaminated by aflatoxigenic fungi in the field and during storage. Biological control could be considered as an alternative to chemical treatment. In this study, we evaluated the antifungal and anti-mycotoxigenic capability of two Bacillus spp. both in vitro and on pistachio kernels. In in vitro conditions, both strains were able to reduce the mycelial growth and they were able to degrade the four aflatoxins during the first three days after inoculation...
May 15, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28525654/molecular-detection-by-analysis-of-the-16s-rrna-gene-of-fecal-coliform-bacteria-from-the-two-korean-apodemus-species-apodemus-agrarius-and-a-peninsulae
#18
M M Rahman, K B Yoon, S J Lim, M G Jeon, H J Kim, H Y Kim, J Y Cho, H M Chae, Y C Park
Wild mouse feces can disseminate zoonotic microorganisms throughout a farm, which is a great threat to human health and can lead to economic loss through contaminated agricultural produce. To assess the microbial communities, especially fecal coliform bacteria, we used two methods. First, we isolated bacterial colonies onto the common media LB (lactose broth) agar, TSA (tryptic soy agar), and MRS (de Man, Rogosa, and Sharpe) agar, and then randomly select colonies from each plate and stocked them to the mother plate for genomic DNA isolation...
May 18, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28521229/development-of-jerusalem-artichoke-resource-for-efficient-one-step-fermentation-of-poly-%C3%AE-glutamic-acid-using-a-novel-strain-bacillus-amyloliquefaciens-nx-2s
#19
Yibin Qiu, Yuanyuan Sha, Yatao Zhang, Zongqi Xu, Sha Li, Peng Lei, Zheng Xu, Xiaohai Feng, Hong Xu
This study aimed to develop non-food fermentation for the cost-effective production of poly-(γ-glutamic acid) (γ-PGA) using a novel strain of Bacillus amyloliquefaciens NX-2S. The new isolate assimilated inulin more efficiently than other carbohydrates from Jerusalem artichoke, without hydrolytic treatment. To investigate the effect of inulin on γ-PGA production, the transcript levels of γ-PGA synthetase genes (pgsB, pgsC, pgsA), regulatory genes (comA, degQ, degS), and the glutamic acid biosynthesis gene (glnA) were analyzed; inulin addition upregulated these key genes...
September 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28481506/functional-silver-nanocomposites-as-broad-spectrum-antimicrobial-and-biofilm-disrupting-agents
#20
Qianqian Guo, Yu Zhao, Xiaomei Dai, Tianqi Zhang, Yunjian Yu, Xinge Zhang, Chaoxing Li
Biofilms' tolerance has become a serious clinical concern due to their formidable resistance to conventional antibiotics and prevalent virulence. Therefore, there is an urgent need to develop alternative antimicrobial agents to eradicate biofilms but avoid using antibiotics. Herein, we successfully developed polymer functional silver nanocomposites by reduction of silver nitrate in the presence of a biocompatible carbohydrate polymer and a membrane-disrupting cationic polymer. The nanocomposites presented effective antimicrobial activity against Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus and Bacillus amyloliquefaciens)...
May 15, 2017: ACS Applied Materials & Interfaces
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