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https://www.readbyqxmd.com/read/28097419/modelling-wolbachia-infection-in-a-sex-structured-mosquito-population-carrying-west-nile-virus
#1
József Z Farkas, Stephen A Gourley, Rongsong Liu, Abdul-Aziz Yakubu
Wolbachia is possibly the most studied reproductive parasite of arthropod species. It appears to be a promising candidate for biocontrol of some mosquito borne diseases. We begin by developing a sex-structured model for a Wolbachia infected mosquito population. Our model incorporates the key effects of Wolbachia infection including cytoplasmic incompatibility and male killing. We also allow the possibility of reduced reproductive output, incomplete maternal transmission, and different mortality rates for uninfected/infected male/female individuals...
January 17, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28095207/the-constitutive-endopolygalacturonase-tvpg2-regulates-the-induction-of-plant-systemic-resistance-by-trichoderma-virens
#2
Sabrina Sarrocco, Fabiola Matarese, Riccardo Baroncelli, Giovanni Vannacci, Verena Seidl-Seiboth, Christian Peter Kubicek, Mariarosaria Vergara
Trichoderma spp. are opportunistic fungi some of which are commonly present in the rhizosphere. Several species, such as Trichoderma virens, are also efficient biocontrol agents against phytopathogenic fungi and exert beneficial effects on plants. These effects are the consequence of interactions between Trichoderma and plant roots, which trigger enhanced plant growth and induce plant resistance. We have previously shown that T. virens I10 expresses two endopolygalacturonase genes, tvpg1 and tvpg2, during the interaction with plant roots; tvpg1 is inducible while tvpg2 is constitutively transcribed...
January 17, 2017: Phytopathology
https://www.readbyqxmd.com/read/28093332/chitin-and-chitinase-role-in-pathogenicity-allergenicity-and-health
#3
REVIEW
Seema Patel, Arun Goyal
Chitin, a polysaccharide with particular abundance in fungi, nematodes and arthropods is immunogenic. It acts as a threat to other organisms, to tackle which they have been endowed with chitinase enzyme. Even if this enzyme is not present in all organisms, they possess proteins having chitin-binding domain(s) (ChtBD). Many lethal viruses like Ebola, and HCV (HepatitisC virus) have these domains to manipulate their carriers and target organisms. In keeping with the basic rule of survival, the self-origin (own body component) chitins and chitinases are protective, but that of non-self origin (from other organisms) are detrimental to health...
January 13, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28093209/combinatorial-effect-of-bacillus-amyloliquefaciens-ag1-biosurfactant-and-bacillus-thuringiensis-vip3aa16-toxin-on-spodoptera-littoralis-larvae
#4
Saoussen Ben Khedher, Hanen Boukedi, Mariam Dammak, Olfa Kilani-Feki, Tahya Sellami-Boudawara, Lobna Abdelkefi-Mesrati, Slim Tounsi
Spodoptera littoralis, one of the most serious and destructive agricultural pests in the world, is very susceptible to Vip3 toxin. In order to develop a new efficient bioinsecticide and to prevent the development of resistance by the target pest, insecticidal activity of biosurfactant produced by Bacillus amyloliquefaciens AG1 was evaluated against S. littoralis. Bioassays revealed the susceptibility of the first instar larvae of this pest to AG1 biosurfactant with an LC50 of 245 ng/cm(2). Moreover, the histopathology examination of the larval midgut treated by AG1 biosurfactant showed vacuolization, necrosis and disintegration of the basement membrane...
January 13, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28091587/bacillus-volatiles-adversely-affect-the-physiology-and-ultra-structure-of-ralstonia-solanacearum-and-induce-systemic-resistance-in-tobacco-against-bacterial-wilt
#5
Hafiz Abdul Samad Tahir, Qin Gu, Huijun Wu, Yuedi Niu, Rong Huo, Xuewen Gao
Volatile organic compounds (VOCs) produced by various bacteria have significant potential to enhance plant growth and to control phytopathogens. Six of the most effective antagonistic Bacillus spp. were used in this study against Ralstonia solanacearum (Rsc) TBBS1, the causal agent of bacterial wilt disease in tobacco. Bacillus amyloliquefaciens FZB42 and Bacillus artrophaeus LSSC22 had the strongest inhibitory effect against Rsc. Thirteen VOCs produced by FZB42 and 10 by LSSC22 were identified using gas chromatography-mass spectrometry analysis...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089049/variation-in-virulence-of-beauveria-bassiana-and-b-pseudobassiana-to-the-pine-weevil-pissodes-nemorensis-in-relation-to-mycelium-characteristics-and-virulence-genes
#6
Pedro Romón, Hardus Hatting, Arturo Goldarazena, Juan Carlos Iturrondobeitia
Entomopathogenic fungi such as Beauveria spp. have potential applications in the biocontrol of insect pests but little is known regarding their infectivity to the pine weevil Pissodes nemorensis. In this study, five isolates of Beauveria pseudobassiana and five isolates of Beauveria bassiana were tested for characteristics correlating with virulence on P. nemorensis. Isolate UAMH301 had the lowest mean lethal concentration value whereas the highest value was obtained with isolate LRC137. Growth rate was negatively correlated with virulence in B...
February 2017: Fungal Biology
https://www.readbyqxmd.com/read/28089047/cypome-of-the-conifer-pathogen-heterobasidion-irregulare-inventory-phylogeny-and-transcriptional-analysis-of-the-response-to-biocontrol
#7
Anthony C Mgbeahuruike, Andriy Kovalchuk, Wimal Ubhayasekera, David R Nelson, Jagjit S Yadav
The molecular mechanisms underlying the interaction of the pathogen, Heterobasidion annosum s.l., the conifer tree and the biocontrol fungus, Phlebiopsis gigantea have not been fully elucidated. Members of the cytochrome P450 (CYP) protein family may contribute to the detoxification of components of chemical defence of conifer trees by H. annosum during infection. Additionally, they may also be involved in the interaction between H. annosum and P. gigantea. A genome-wide analysis of CYPs in Heterobasidion irregulare was carried out alongside gene expression studies...
February 2017: Fungal Biology
https://www.readbyqxmd.com/read/28078051/complete-genome-sequence-of-pseudomonas-brassicacearum-strain-l13-6-12-a-biological-control-agent-from-the-rhizosphere-of-potato
#8
Christin Zachow, Henry Müller, Jana Monk, Gabriele Berg
Pseudomonas brassicacearum strain L13-6-12 is a rhizosphere colonizer of potato, lettuce and sugar beet. Previous studies have shown that this motile, Gram-negative, non-sporulating bacterium is an effective biocontrol agent against different phytopathogens. Here, we announce and describe the complete genome sequence of P. brassicacearum L13-6-12 consisting of a single 6.7 Mb circular chromosome that consists of 5773 protein coding genes and 85 RNA-only encoding genes. Genome analysis revealed genes encoding specialized functions for pathogen suppression, thriving in the rhizosphere and interacting with eukaryotic organisms...
2017: Standards in Genomic Sciences
https://www.readbyqxmd.com/read/28074041/transcription-factor-xpp1-is-a-switch-between-primary-and-secondary-fungal-metabolism
#9
Christian Derntl, Bernhard Kluger, Christoph Bueschl, Rainer Schuhmacher, Robert L Mach, Astrid R Mach-Aigner
Fungi can produce a wide range of chemical compounds via secondary metabolism. These compounds are of major interest because of their (potential) application in medicine and biotechnology and as a potential source for new therapeutic agents and drug leads. However, under laboratory conditions, most secondary metabolism genes remain silent. This circumstance is an obstacle for the production of known metabolites and the discovery of new secondary metabolites. In this study, we describe the dual role of the transcription factor Xylanase promoter binding protein 1 (Xpp1) in the regulation of both primary and secondary metabolism of Trichoderma reesei Xpp1 was previously described as a repressor of xylanases...
January 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28071749/tomato-progeny-inherit-resistance-to-the-nematode-meloidogyne-javanica-linked-to-plant-growth-induced-by-the-biocontrol-fungus-trichoderma-atroviride
#10
Hugo Agripino de Medeiros, Jerônimo Vieira de Araújo Filho, Leandro Grassi de Freitas, Pablo Castillo, María Belén Rubio, Rosa Hermosa, Enrique Monte
Root-knot nematodes (RKN) are major crop pathogens worldwide. Trichoderma genus fungi are recognized biocontrol agents and a direct activity of Trichoderma atroviride (Ta) against the RKN Meloidogyne javanica (Mj), in terms of 42% reduction of number of galls (NG), 60% of number of egg masses and 90% of number of adult nematodes inside the roots, has been observed in tomato grown under greenhouse conditions. An in vivo split-root designed experiment served to demonstrate that Ta induces systemic resistance towards Mj, without the need for the organisms to be in direct contact, and significantly reduces NG (20%) and adult nematodes inside tomato roots (87%)...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28070544/malonylome-of-the-plant-growth-promoting-rhizobacterium-with-potent-biocontrol-activity-bacillus-amyloliquefaciens-fzb42
#11
Ben Fan, Yu-Long Li, Lei Li, Xiao-Jun Peng, Chen Bu, Xiao-Qin Wu, Rainer Borriss
The data presented in this article are related to the publication entitled "Malonylome analysis of rhizobacterium Bacillus amyloliquefaciens FZB42 reveals involvement of lysine malonylation in polyketide synthesis and plant-bacteria interactions"(doi:10.1016/j.jprot.2016.11.022) (B. Fan, Y. Li, L. Li et al.) [1]. This article presented the raw information of all malonyllysine sites identified by LC-MS/MS in the Bacillus amyloliquefaciens FZB42. Further, the functional features and conservation of the malonylated peptide/proteins were analyzed and made publicly available to enable critical or extended analyses...
February 2017: Data in Brief
https://www.readbyqxmd.com/read/28066972/efficacy-of-a-long-lasting-bifenthrin-treated-net-against-horticultural-pests-and-its-compatibility-with-the-predatory-mite-amblyseius-swirskii-and-the-parasitic-wasp-eretmocerus-mundus
#12
Mª Del Mar Fernández, Ignacio Colomer, Pilar Medina, Alberto Fereres, Pedro Del Estal, Elisa Viñuela
BACKGROUND: The insecticide-treated nets (ITNs) are being investigated lately for their use in agriculture. Depending on the insecticide, the hole size and the way they are produced, these nets can target different pests and therefore they could be interesting options to be used in Integrated Pest Management (IPM). As the information on their compatibility with beneficial fauna is practically negligible, in this work we have tested the compatibility of an experimental bifenthrin long lasting insecticide-treated net (LLITN) with Amblyseius swirskii and Eretmocerus mundus, important natural enemies of whiteflies and thrips, under laboratory, semi-field and commercial greenhouses...
January 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28063921/tricalcium-phosphate-solubilization-and-nitrogen-fixation-by-newly-isolated-aneurinibacillus-aneurinilyticus-ckmv1-from-rhizosphere-of-valeriana-jatamansi-and-its-growth-promotional-effect
#13
Anjali Chauhan, Shiwani Guleria, Praveen P Balgir, Abhishek Walia, Rishi Mahajan, Preeti Mehta, Chand Karan Shirkot
Aneurinibacillus aneurinilyticus strain CKMV1 was isolated from rhizosphere of Valeriana jatamansi and possessed multiple plant growth promoting traits like production of phosphate solubilization (260mg/L), nitrogen fixation (202.91nmolethylenemL(-1)h(-1)), indole-3-acetic acid (IAA) (8.1μg/mL), siderophores (61.60%), HCN (hydrogen cyanide) production and antifungal activity. We investigated the ability of isolate CKMV1 to solubilize insoluble P via mechanism of organic acid production. High-performance liquid chromatography (HPLC) study showed that isolate CKMV1 produced mainly gluconic (1...
December 24, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28063330/endolysin-lyssa97-is-synergistic-with-carvacrol-in-controlling-staphylococcus-aureus-in-foods
#14
Yoonjee Chang, Hyunjin Yoon, Dong-Hyun Kang, Pahn-Shick Chang, Sangryeol Ryu
LysSA97 is an endolysin encoded by the bacteriophage SA97, the genome sequence of which has been recently revealed. LysSA97 has lytic activity against a variety of Staphylococcus strains that cause foodborne illness. In order to improve its potential as a biocontrol agent against Staphylococcus, various types of essential oil-derived active compounds were tested in combination with LysSA97; carvacrol exhibited significant synergistic effects when combined with LysSA97. The synergistic antimicrobial activity between endolysin and carvacrol in food products, including milk and beef, were investigated...
December 27, 2016: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28063085/can-toxicants-used-against-cotton-mealybug-phenacoccus-solenopsis-be-compatible-with-an-encyrtid-parasitoid-aenasius-bambawalei-under-laboratory-conditions
#15
Hayat Badshah, Farman Ullah, Paul Andre Calatayud, Hidayat Ullah, Bashir Ahmad
The cotton mealybug, Phenacoccus solenopsis Tinsley (Sternorrhyncha: Pseudococcidae) is a serious pest of various cultivated plants in Pakistan. Recent reports show that the parasitoid Aenasius bambawalei Hayat (Hymenoptera: Encyrtidae) is a good biocontrol agent of the pest. Compatibleness is important in any IPM programme, and the insecticide used must have little or no effects on the biological control agent. This study investigated the compatibility of neem treatments and a commercial insecticide, imidacloprid on A...
January 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28057927/omics-for-understanding-synergistic-action-of-validamycin-a-and-trichoderma-asperellum-gdfs1009-against-maize-sheath-blight-pathogen
#16
Qiong Wu, Lida Zhang, Hai Xia, Chuanjin Yu, Kai Dou, Yaqian Li, Jie Chen
Sheath blight, causes by Rhizoctonia spp., threaten maize yield every year throughout the world. Trichoderma could degrade Rhizoctonia solani on maize mainly via competition and hyperparasitism, whereas validamycin A could efficiently inhibit the growth of R. solani via disturbing the energy system. By contrast, validamycin A is efficient but it takes effect in a short period, while Trichoderma takes effect in a long period though time-consuming. To overcome the disadvantages, Trichoderma asperellum GDFS1009 was used together with validamycin A...
January 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28056814/competition-assays-and-physiological-experiments-of-soil-and-phyllosphere-yeasts-identify-candida-subhashii-as-a-novel-antagonist-of-filamentous-fungi
#17
Maja Hilber-Bodmer, Michael Schmid, Christian H Ahrens, Florian M Freimoser
BACKGROUND: While recent advances in next generation sequencing technologies have enabled researchers to readily identify countless microbial species in soil, rhizosphere, and phyllosphere microbiomes, the biological functions of the majority of these species are unknown. Functional studies are therefore urgently needed in order to characterize the plethora of microorganisms that are being identified and to point out species that may be used for biotechnology or plant protection. Here, we used a dual culture assay and growth analyses to characterise yeasts (40 different isolates) and their antagonistic effect on 16 filamentous fungi; comprising plant pathogens, antagonists, and saprophytes...
January 5, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28053590/in-vitro-biocontrol-activity-of-halotolerant-streptomyces-aureofaciens-k20-a-potent-antagonist-against-macrophomina-phaseolina-tassi-goid
#18
P Shrivastava, R Kumar, M S Yandigeri
A halotolerant actinobacterial strain isolated from salinity affected soil of Eastern Indo-Gangetic plains (IGP), Uttar Pradesh, India, was characterised for its antagonistic potential against Macrophomina phaseolina by dual-culture assay. It was shown to effectively inhibit the growth of M. phaseolina with an inhibition zone of 27 ± 1.33 mm. Further the actinobacterial strain was evaluated for its plant growth promoting (PGP) properties and its ability to produce biocontrol related extracellular enzymes viz...
January 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28051350/can-plant-microbiome-studies-lead-to-effective-biocontrol-of-plant-diseases
#19
Jeffrey Ellis
In this commentary I question the wisdom and efficacy of studies seeking disease attenuating microbes and microbiomes only in healthy plant communities and posit the alternative view that success in biocontrol of crop diseases may come also come from studies of microbiota, or at least individual species isolates, associated with diseased plants. In support of this view I summarise the current extensive knowledge of the biology behind what is probably the most successful biocontrol of a plant disease, namely the biocontrol of crown gall of stone fruit using non-pathogenic Rhizobium rhizogenes strain K84 (New and Kerr, 1972; Kerr, 2016) where the biocontrol agent itself came from a diseased plant...
January 4, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/28050842/transformation-of-the-endochitinase-gene-chi67-1-in-clonostachys-rosea-67-1-increases-its-biocontrol-activity-against-sclerotinia-sclerotiorum
#20
Zhan-Bin Sun, Man-Hong Sun, Mo Zhou, Shi-Dong Li
Clonostachys rosea is a promising biocontrol fungus active against various plant fungal pathogens. In this study, the endochitinase-encoding gene Chi67-1, the expression of which is sharply upregulated in C. rosea 67-1 when induced by sclerotia, was transformed into the original isolate by protoplast transformation, and transformants were screened against Sclerotinia rot of soybean. The transformation efficiency was approximately 50 transformants per 1 × 10(7) protoplasts, and 68 stably heritable recombinants were assayed...
December 2017: AMB Express
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