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https://www.readbyqxmd.com/read/28812884/controlling-bdellovibrio-bacteriovorus-gene-expression-and-predation-using-synthetic-riboswitches
#1
Mohammed Dwidar, Yohei Yokobayashi
Bdellovibrio bacteriovorus is a predatory bacterium that feeds on Gram-negative bacteria including a wide range of pathogens and thus has potential applications as a biocontrol agent. Owing to its unique life cycle, however, there are limited tools that enable genetic manipulation of B. bacteriovorus. This work describes our first steps towards engineering the predatory bacterium for practical applications by developing basic genetic parts to control gene expression. Specifically, we evaluated four robust promoters that are active during the attack phase of B...
August 16, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28812726/biocontrol-of-common-carp-in-australia-poses-risks-to-biosecurity
#2
Jackie Lighten, Cock van Oosterhout
No abstract text is available yet for this article.
February 21, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28812689/safe-and-effective-biocontrol-of-common-carp
#3
Kenneth A McColl, Andy W Sheppard, Matt Barwick
No abstract text is available yet for this article.
April 3, 2017: Nature ecology & evolution
https://www.readbyqxmd.com/read/28811757/cyclic-dipeptides-from-bacillus-vallismortis-bs07-require-key-components-of-plant-immunity-to-induce-disease-resistance-in-arabidopsis-against-pseudomonas-infection
#4
Seong Woo Noh, Rira Seo, Jung-Kwon Park, Md Maniruzzaman Manir, Kyungseok Park, Mee Kyung Sang, Surk-Sik Moon, Ho Won Jung
Cyclic dipeptides (CDPs) are one of the simplest compounds produced by living organisms. Plant-growth promoting rhizobacteria (PGPRs) also produce CDPs that can induce disease resistance. Bacillus vallismortis strain BS07 producing various CDPs has been evaluated as a potential biocontrol agent against multiple plant pathogens in chili pepper. However, plant signal pathway triggered by CDPs has not been fully elucidated yet. Here we introduce four CDPs, cyclo(Gly-L-Pro) previously identified from Aspergillus sp...
August 2017: Plant Pathology Journal
https://www.readbyqxmd.com/read/28807055/transcriptomic-profiling-of-microbe-microbe-interactions-reveals-the-specific-response-of-the-biocontrol-strain-p-fluorescens-in5-to-the-phytopathogen-rhizoctonia-solani
#5
Rosanna C Hennessy, Mikkel A Glaring, Stefan Olsson, Peter Stougaard
BACKGROUND: Few studies to date report the transcriptional response of biocontrol bacteria toward phytopathogens. In order to gain insights into the potential mechanism underlying the antagonism of the antimicrobial producing strain P. fluorescens In5 against the phytopathogens Rhizoctonia solani and Pythium aphanidermatum, global RNA sequencing was performed. METHODS: Differential gene expression profiling of P. fluorescens In5 in response to either R. solani or P...
August 10, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28805642/hytrosaviruses-current-status-and-perspective
#6
REVIEW
Henry M Kariithi, Irene K Meki, Drion G Boucias, Adly Mm Abd-Alla
Salivary gland hytrosaviruses (SGHVs) are entomopathogenic dsDNA, enveloped viruses that replicate in the salivary glands (SGs) of the adult dipterans, Glossina spp (GpSGHV) and Musca domestica (MdSGHV). Although belonging to the same virus family (Hytrosaviridae), SGHVs have distinct morphologies and pathobiologies. Two GpSGHV strains potentially account for the differential pathologies in lab-bred tsetse. New data suggest incorporation of host-derived cellular proteins and lipids into mature SGHVs. In addition to within the SGs, MdSGHV undergoes limited replication in the corpora allata, potentially disrupting hormone biosynthesis, and GpSGHV replicates in the milk glands providing a transmission conduit to progeny tsetse...
August 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/28805637/wolbachia-mediated-virus-blocking-in-the-mosquito-vector-aedes-aegypti
#7
REVIEW
Gerard Terradas, Elizabeth A McGraw
Viruses transmitted by mosquitoes such as dengue, Zika and West Nile cause a threat to global health due to increased geographical range and frequency of outbreaks. The bacterium Wolbachia pipientis may be the solution reducing disease transmission. Though commonly missing in vector species, the bacterium was artificially and stably introduced into Aedes aegypti to assess its potential for biocontrol. When infected with Wolbachia, mosquitoes become refractory to infection by a range of pathogens, including the aforementioned viruses...
August 2017: Current Opinion in Insect Science
https://www.readbyqxmd.com/read/28802003/recombinant-lactococcus-lactis-for-efficient-conversion-of-cellodextrins-into-l-lactic-acid
#8
Chiara Gandini, Loredana Tarraran, Denis Kalemasi, Enrica Pessione, Roberto Mazzoli
Lactic acid bacteria (LAB) are among the most interesting organisms for industrial processes with a long history of application as food starters and biocontrol agents, and an underexploited potential for biorefineries converting biomass into high-value compounds. Lactic acid (LA), their main fermentation product, is among the most requested chemicals owing to its broad range of applications. Notably, LA polymers, i.e., polylactides, have high potential as biodegradable substitutes of fossil-derived plastics...
August 12, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28800826/effect-of-thyme-essential-oil-and-lactococcus-lactis-cbm21-on-the-microbiota-composition-and-quality-of-minimally-processed-lamb-s-lettuce
#9
Lorenzo Siroli, Francesca Patrignani, Diana I Serrazanetti, Pamela Vernocchi, Federica Del Chierico, Alessandra Russo, Sandra Torriani, Lorenza Putignani, Fausto Gardini, Rosalba Lanciotti
The main aim of this work was to evaluate, at pilot scale in an industrial environment, the effects of the biocontrol agent Lactococcus lactis CBM21 and thyme essential oil compared to chlorine, used in the washing step of fresh-cut lamb's lettuce, on the microbiota and its changes in relation to the time of storage. The modification of the microbial population was studied through pyrosequencing in addition to the traditional plate counts. In addition, the volatile molecule and sensory profiles were evaluated during the storage...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28800818/characterization-of-a-novel-endolysin-lyssa11-and-its-utility-as-a-potent-biocontrol-agent-against-staphylococcus-aureus-on-food-and-utensils
#10
Yoonjee Chang, Minsik Kim, Sangryeol Ryu
Here we show that the LysSA11 endolysin, derived from the virulent Staphylococcus aureus phage SA11, has lytic activity against staphylococcal strains. Bioinformatics analysis revealed an enzymatically active CHAP (cysteine, histidine-dependent amidohydrolases/peptidases) domain at the N-terminus of LysSA11 that showed amidase activity. A novel cell wall binding domain (CBD) in the C-terminus could bind to a broad spectrum of staphylococcal cells. The bactericidal activity of LysSA11 was determined in food and utensils artificially contaminated with methicillin-resistant S...
December 2017: Food Microbiology
https://www.readbyqxmd.com/read/28798756/aerial-warfare-a-volatile-dialogue-between-the-plant-pathogen-verticillium-longisporum-and-its-antagonist-paenibacillus-polymyxa
#11
Daria Rybakova, Ute Rack-Wetzlinger, Tomislav Cernava, Angelika Schaefer, Maria Schmuck, Gabriele Berg
Verticillium wilt caused by Verticillium spp. results in severe yield losses in a broad range of crops. Verticillium outbreaks are challenging to control, and exacerbated by increases in soil temperatures and drought associated with global warming. Employing natural antagonists as biocontrol agents offers a promising approach to addressing this challenge. Paenibacillus polymyxa Sb3-1 was proven to reduce the growth of Verticillium longisporum during in vitro experiments and was shown to promote the growth of oilseed rape seedlings infested with V...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28798185/whole-genome-sequence-of-starmerella-bacillaris-pas13-a-nonconventional-enological-yeast-with-antifungal-activity
#12
Wilson José Fernandes Lemos Junior, Laura Treu, Vinícius da Silva Duarte, Milena Carlot, Chiara Nadai, Stefano Campanaro, Alessio Giacomini, Viviana Corich
Starmerella bacillaris is a fermentative yeast commonly found in vineyards. Here, we present the draft genome sequence of S. bacillaris PAS13, a nonconventional enological yeast with a potential role as a biocontrol agent. This gene sequence will provide insights into the genetic basis of yeast activity against gray mold disease (Botrytis cinerea).
August 10, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28795325/diseased-social-predators
#13
Frank M Hilker, Marta Paliga, Ezio Venturino
Social predators benefit from cooperation in the form of increased hunting success, but may be at higher risk of disease infection due to living in groups. Here, we use mathematical modeling to investigate the impact of disease transmission on the population dynamics benefits provided by group hunting. We consider a predator-prey model with foraging facilitation that can induce strong Allee effects in the predators. We extend this model by an infectious disease spreading horizontally and vertically in the predator population...
August 9, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28792417/vibrio-tapetis-from-wrasse-used-for-ectoparasite-bio-control-in-salmon-farming-phylogenetic-analysis-and-serotyping
#14
Snorre Gulla, Anita Rønneseth, Henning Sørum, Øyvind Vågnes, Sabela Balboa, Jesús L Romalde, Duncan J Colquhoun
So-called 'cleaner fish', including various wrasse (Labridae) species, have become increasingly popular in Norwegian salmon farming in recent years for biocontrol of the salmon louse Lepeophtheirus salmonis. Cleaner fish mortalities in salmon farms are, however, often high. Various bacterial agents are frequently associated with episodes of increased cleaner fish mortality, and Vibrio tapetis is regularly cultured from diseased wrasse. In the present study, we investigated the genetic relationships among 54 V...
August 9, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28791467/banana-fusarium-wilt-disease-incidence-is-influenced-by-shifts-of-soil-microbial-communities-under-different-monoculture-spans
#15
Zongzhuan Shen, C Ryan Penton, Nana Lv, Chao Xue, Xianfu Yuan, Yunze Ruan, Rong Li, Qirong Shen
The continuous cropping of banana in the same field may result in a serious soil-borne Fusarium wilt disease and a severe yield decline, a phenomenon known as soil sickness. Although soil microorganisms play key roles in maintaining soil health, the alternations of soil microbial community and relationship between these changes and soil sickness under banana monoculture are still unclear. Bacterial and fungal communities in the soil samples collected from banana fields with different monoculture spans were profiled by sequencing of the 16S rRNA genes and internal transcribed spacer using the MiSeq platform to explore the relationship between banana monoculture and Fusarium wilt disease in the present study...
August 8, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/28782996/an-assessment-of-willingness-to-pay-by-maize-and-groundnut-farmers-for-aflatoxin-biocontrol-product-in-northern-nigeria
#16
Bamikole Ayedun, Godwin Okpachu, Victor Manyong, Joseph Atehnkeng, Adebayo Akinola, G A Abu, Ranajit Bandyopadhyay, Tahirou Abdoulaye
In Nigeria, Aflasafe is a registered biological product for reducing aflatoxin infestation of crops from the field to storage, making the crops safer for consumption. The important questions are whether farmers will purchase and apply this product to reduce aflatoxin contamination of crops, and if so under what conditions. A study was carried out to address these questions and assess determinants of willingness to pay (WTP) for the product among maize and groundnut farmers in Kano and Kaduna states in Nigeria...
August 7, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28774967/genome-sequence-of-a-podovirus-aapec6-isolated-from-wastewater-in-new-zealand-that-infects-escherichia-coli-o45-h10
#17
Judith Nonis, Aruni Premaratne, Craig Billington, Arvind Varsani
Bacteriophages are ideal candidates for pathogen biocontrol to mitigate outbreaks of prevalent foodborne pathogens, such as Escherichia coli We identified a bacteriophage (AAPEc6) from wastewater that infects E. coli O45:H10. The AAPEc6 genome sequence shares 93% identity (with 92% coverage) to enterobacterial phage K1E (Sp6likevirus) in the Autographivirinae subfamily (Podoviridae).
August 3, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28769942/bacteriophage-based-bacterial-wilt-biocontrol-for-an-environmentally-sustainable-agriculture
#18
REVIEW
Belén Álvarez, Elena G Biosca
Bacterial wilt diseases caused by Ralstonia solanacearum, R. pseudosolanacearum, and R. syzygii subsp. indonesiensis (former R. solanacearum species complex) are among the most important plant diseases worldwide, severely affecting a high number of crops and ornamentals. Difficulties of bacterial wilt control by non-biological methods are related to effectiveness, bacterial resistance and environmental impact. Alternatively, a great many biocontrol strategies have been carried out, with the advantage of being environmentally friendly...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28769881/genetic-diversity-of-nitrogen-fixing-and-plant-growth-promoting-pseudomonas-species-isolated-from-sugarcane-rhizosphere
#19
Hai-Bi Li, Rajesh K Singh, Pratiksha Singh, Qi-Qi Song, Yong-Xiu Xing, Li-Tao Yang, Yang-Rui Li
The study was designed to isolate and characterize Pseudomonas spp. from sugarcane rhizosphere, and to evaluate their plant- growth- promoting (PGP) traits and nitrogenase activity. A biological nitrogen-fixing microbe has great potential to replace chemical fertilizers and be used as a targeted biofertilizer in a plant. A total of 100 isolates from sugarcane rhizosphere, belonging to different species, were isolated; from these, 30 isolates were selected on the basis of preliminary screening, for in vitro antagonistic activities against sugarcane pathogens and for various PGP traits, as well as nitrogenase activity...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28763165/a-pesticide-paradox-fungicides-indirectly-increase-fungal-infections
#20
Jason R Rohr, Jenise Brown, William A Battaglin, Taegan A McMahon, Rick A Relyea
There are many examples where the use of chemicals have had profound unintended consequences, such as fertilizers reducing crop yields (paradox of enrichment) and insecticides increasing insect pests (by reducing natural biocontrol). Recently, the application of agrochemicals, such as agricultural disinfectants and fungicides, has been explored as an approach to curb the pathogenic fungus, Batrachochytrium dendrobatidis (Bd), which is associated with worldwide amphibian declines. However, the long-term, net effects of early-life exposure to these chemicals on amphibian disease risk have not been thoroughly investigated...
August 1, 2017: Ecological Applications: a Publication of the Ecological Society of America
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