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Beauveria bassiana

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https://www.readbyqxmd.com/read/28296161/passive-vectoring-of-entomopathogenic-fungus-beauveria-bassiana-among-the-wax-moth-galleria-mellonella-larvae-by-the-ectoparasitoid-habrobracon-hebetor-females
#1
Vadim Yu Kryukov, Natalia A Kryukova, Maksim V Tyurin, Olga N Yaroslavtseva, Viktor V Glupov
Females of the ectoparasitoid Habrobracon hebetor attack and envenomate numerous host individuals during oviposition. The vectoring of the entomopathogenic fungus Beauveria bassiana during the adhesion stage by ectoparasitoid females among the wax moth larvae Galleria mellonella was explored under laboratory conditions. Vectoring occurred both from infected parasitoids to wax moth larvae and from infected to healthy wax moth larvae by parasitoids. The efficacy of vectoring in both cases was dose dependent. Parasitoid females were unable to recognize infected larvae in a labyrinth test...
March 15, 2017: Insect Science
https://www.readbyqxmd.com/read/28295016/global-insight-into-lysine-acetylation-events-and-their-links-to-biological-aspects-in-beauveria-bassiana-a-fungal-insect-pathogen
#2
Zhi-Kang Wang, Qing Cai, Jin Liu, Sheng-Hua Ying, Ming-Guang Feng
Lysine acetylation (Kac) events in filamentous fungi are poorly explored. Here we show a lysine acetylome generated by LC-MS/MS analysis of immunoaffinity-based Kac peptides from normal hyphal cells of Beauveria bassiana, a fungal entomopathogen. The acetylome comprised 283 Kac proteins and 464 Kac sites. These proteins were enriched to eight molecular functions, 20 cellular components, 27 biological processes, 20 KEGG pathways and 12 subcellular localizations. All Kac sites were characterized as six Kac motifs, including a novel motif (KacW) for 26 Kac sites of 17 unknown proteins...
March 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28292241/microbial-pest-control-agents-are-they-a-specific-and-safe-tool-for-insect-pest-management
#3
Caroline Deshayes, Myriam Siegwart, David Pauron, Josy-Anne Froger, Bruno Lapied, Véronique Apaire-Marchais
Microorganisms (viruses, bacteria and fungi) or their bioactive agents can be used as active substances and therefore are referred as Microbial Pest Control Agents (MPCA). They are used as alternative strategies to chemical insecticides to counteract the development of resistances and to reduce adverse effects on both environment and human health. These natural entomopathogenic agents, which have specific modes of action, are generally considered safer as compared to conventional chemical insecticides. Baculoviruses are the only viruses being used as the safest biological control agents...
March 14, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28276124/two-eisosome-proteins-play-opposite-roles-in-autophagic-control-and-sustain-cell-integrity-function-and-pathogenicity-in-beauveria-bassiana
#4
Long-Bin Zhang, Li Tang, Sheng-Hua Ying, Ming-Guang Feng
Pil1A and Pil1B are two core eisosome proteins that are homologous to yeast Pil1/Lsp1 or filamentous fungal Pil1A/Pil1B but have been unexplored in entomopathogenic fungi. Here we examined subcellular localization and functions of Pil1A and Pil1B in Beauveria bassiana, a fungal insect pathogen. Either localization or co-localization experiments of the two proteins demonstrated that Pil1A and Pil1B were simultaneously localized at the periphery of hyphal cells for formation of stable, punctuate spots in B. bassiana...
March 9, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28262388/enzymatic-comparison-and-mortality-of-beauveria-bassiana-against-cabbage-caterpillar-pieris-brassicae-linn
#5
Manish Dhawan, Neelam Joshi
Beauveria bassiana, an entomopathogenic fungus, is the alternative biocontrol agent exploited against major economic crop pests. Pieris brassicae L. is an emerging pest of the Brassicaceae family. Therefore, in the present study, fungal isolates of Beauveria bassiana, viz. MTCC 2028, MTCC 4495, MTCC 6291, and NBAII-11, were evaluated for their virulence against third instar larvae of P. brassicae. Among all these fungal isolates, maximum mortality (86.66%) was recorded in B. bassiana MTCC 4495 at higher concentration of spores (10(9)conidia/ml), and the minimum mortality (30...
February 16, 2017: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/28228181/characterization-and-functional-analysis-of-serpin-1-like-gene-from-oak-silkworm-antheraea-pernyi
#6
H M Yu, B J Zhu, Y Sun, G Q Wei, L Wang, C Qian, M Nadeem Abbas, C L Liu
Serpins are a broadly distributed family of proteases found in various organisms that play an important role in regulating the immune response. Here, we identified a serpin-1 gene from Antheraea pernyi that encodes a 279 amino acid protein with a molecular weight of 30.8 kDa. We expressed the recombinant Ap-serpin-1 protein in Escherichia coli and used the purified protein to prepare rabbit anti-Ap-serpin-1 polyclonal antibodies. We calculated the enzyme-linked immunosorbent assay titer of the antibody as 1:128000...
February 23, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28208575/rna-seq-analyses-for-two-silkworm-strains-reveals-insight-into-their-susceptibility-and-resistance-to-beauveria-bassiana-infection
#7
Dongxu Xing, Qiong Yang, Liang Jiang, Qingrong Li, Yang Xiao, Mingqiang Ye, Qingyou Xia
The silkworm Bombyx mori is an economically important species. White muscardine caused by Beauveria bassiana is the main fungal disease in sericulture, and understanding the silkworm responses to B. bassiana infection is of particular interest. Herein, we investigated the molecular mechanisms underlying these responses in two silkworm strains Haoyue (HY, sensitive to B. bassiana) and Kang 8 (K8, resistant to B. bassiana) using an RNA-seq approach. For each strain, three biological replicates for immersion treatment, two replicates for injection treatment and three untreated controls were collected to generate 16 libraries for sequencing...
February 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28194425/molecular-cloning-bioinformatic-analysis-and-expression-of-bombyx-mori-lebocin-5-gene-related-to-beauveria-bassiana-infection
#8
Dingding Lü, Chengxiang Hou, Guangxing Qin, Kun Gao, Tian Chen, Xijie Guo
A full-length cDNA of lebocin 5 (BmLeb5) was first cloned from silkworm, Bombyx mori, by rapid amplification of cDNA ends. The BmLeb5 gene is 808 bp in length and the open reading frame encodes a 179-amino acid hydroxyproline-rich peptide. Bioinformatic analysis results showed that BmLeb5 owns an O-glycosylation site and four RXXR motifs as other lebocins. Sequence similarity and phylogenic analysis results indicated that lebocins form a multiple gene family in silkworm as cecropins. Quantitative real-time PCR analysis revealed that BmLeb5 was highest expressed in the fat body...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28193896/regulatory-cascade-and-biological-activity-of-beauveria-bassiana-oosporein-that-limits-bacterial-growth-after-host-death
#9
Yanhua Fan, Xi Liu, Nemat O Keyhani, Guirong Tang, Yan Pei, Wenwen Zhang, Sheng Tong
The regulatory network and biological functions of the fungal secondary metabolite oosporein have remained obscure. Beauveria bassiana has evolved the ability to parasitize insects and outcompete microbial challengers for assimilation of host nutrients. A novel zinc finger transcription factor, BbSmr1 (B. bassiana secondary metabolite regulator 1), was identified in a screen for oosporein overproduction. Deletion of Bbsmr1 resulted in up-regulation of the oosporein biosynthetic gene cluster (OpS genes) and constitutive oosporein production...
February 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28168316/additive-roles-of-two-tps-genes-in-trehalose-synthesis-conidiation-multiple-stress-responses-and-host-infection-of-a-fungal-insect-pathogen
#10
Juan-Juan Wang, Qing Cai, Lei Qiu, Sheng-Hua Ying, Ming-Guang Feng
Intracellular trehalose accumulation is relevant to fungal life and pathogenicity. Trehalose-6-phosphate synthase (TPS) is known to control the first step of trehalose synthesis, but functions of multiple TPS genes in some filamentous fungi are variable. Here, we examined the functions of two TPS genes (tpsA and tpsB) in Beauveria bassiana, a fungal insect pathogen widely applied in arthropod pest control. Intracellular TPS activity and trehalose content decreased by 71-75 and 72-80% in ΔtpsA, and 21-30 and 15-45% in ΔtpsB, respectively, and to undetectable levels in ΔtpsAΔtpsB, under normal and stressful conditions...
February 6, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28114361/studies-on-the-virome-of-the-entomopathogenic-fungus-beauveria-bassiana-reveal-novel-dsrna-elements-and-mild-hypervirulence
#11
Ioly Kotta-Loizou, Robert H A Coutts
The entomopathogenic fungus Beauveria bassiana has a wide host range and is used as a biocontrol agent against arthropod pests. Mycoviruses have been described in phytopathogenic fungi while in entomopathogenic fungi their presence has been reported only rarely. Here we show that 21.3% of a collection of B. bassiana isolates sourced from worldwide locations, harbor dsRNA elements. Molecular characterization of these elements revealed the prevalence of mycoviruses belonging to the Partitiviridae and Totiviridae families, the smallest reported virus to date, belonging to the family Narnaviridae, and viruses unassigned to a family or genus...
January 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28108175/characterization-of-the-synergistic-interaction-between-beauveria-bassiana-strain-gha-and-bacillus-thuringiensis-morrisoni-strain-tenebrionis-applied-against-colorado-potato-beetle-larvae
#12
S P Wraight, M E Ramos
Studies were undertaken to further characterize the previously identified synergistic activity of Bacillus thuringiensis- and Beauveria bassiana-based biopesticides against Colorado potato beetle (CPB). A flowable concentrate of B. thuringiensis morrisoni strain tenebrionis (Bt) (Novodor® FC) and a wettable powder of B. bassiana strain GHA (Bb) (Mycotrol® 22WP) were applied against CPB larval populations infesting potato in field plots. Novodor FC and an oil-dispersion formulation of Bb (Mycotrol ES) were applied against second-instar CPB larvae on potted potato plants in greenhouse tests under low relative humidity (RH), variable-temperature conditions...
March 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28094453/down-regulation-of-a-chitin-synthase-a-gene-by-rna-interference-enhances-pathogenicity-of-beauveria-bassiana-anu1-against-spodoptera-exigua-h%C3%A3-bner
#13
Jung-Bok Lee, Hyun Soo Kim, Youngjin Park
Chitin synthase (CHS) is an important enzymatic component, which is required for chitin formation in the cuticles and cuticular linings of other tissues in insects. CHSs have been divided into two classes, classes A and B, based on their amino acid sequence similarities and functions. Class A CHS (CHS-A) is specifically expressed in the epidermis and related ectodermal cells such as tracheal cells, while class B CHS (CHS-B) is expressed in gut epithelial cells that produce peritrophic matrices. In this study, we cloned the CHS-A gene from the beet armyworm, Spodoptera exigua (SeCHS-A)...
February 2017: Archives of Insect Biochemistry and Physiology
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
#14
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/28076898/characterization-of-the-hog1-mapk-pathway-in-the-entomopathogenic-fungus-beauveria-bassiana
#15
Jing Liu, Zhi-Kang Wang, Huan-Huan Sun, Sheng-Hua Ying, Ming-Guang Feng
High-osmolarity glycerol (HOG) pathway required for yeast osmoregulation relies upon the mitogen-activated protein kinase (MAPK) Hog1 cascade that comprise the MAPKKKs Ssk2/Ssk22 and Ste11 converging on the MAPKK Pbs2. Here we show a Hog1 cascade with the unique MAPKKK Ssk2 acting in Beauveria bassiana. Hypersensitivity to high osmolarity and high resistance to fludioxonil fungicide appeared in Δssk2, Δpbs2 and Δhog1 mutants whereas the two hallmark phenotypes were reversed in Δste11. Increased sensitivity to heat shock and decreased sensitivity to cell wall perturbation also occurred in the three mutants but not in Δste11 although antioxidant phenotypes were different in all deletion mutants...
January 11, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28066976/delivering-beauveria-bassiana-with-electrostatic-powder-for-the-control-of-stored-product-beetles
#16
Athanassiou G Christos, Rumbos I Christos, Sakka Maria, Storm Clare, Dillon Aoife, Potin Olivier
BACKGROUND: The efficacy of a Beauveria bassiana-based formulation (Bb38) with Entostat, an electrostatically charged powder, was investigated as surface treatment against Cryptolestes ferrugineus, Oryzaephilus surinamensis and Sitophilus granarius adults. In lab bioassays, the efficacy of Bb38 against the aforementioned species was examined on concrete, plywood, steel and ceramic, whereas its residual efficacy against the same species was assessed on concrete and steel in the presence or absence of illumination...
January 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28054950/microbial-glycosylation-of-daidzein-genistein-and-biochanin-a-two-new-glucosides-of-biochanin-a
#17
Sandra Sordon, Jarosław Popłoński, Tomasz Tronina, Ewa Huszcza
Biotransformation of daidzein, genistein and biochanin A by three selected filamentous fungi was investigated. As a result of biotransformations, six glycosylation products were obtained. Fungus Beauveria bassiana converted all tested isoflavones to 4″-O-methyl-7-O-glucosyl derivatives, whereas Absidia coerulea and Absidia glauca were able to transform genistein and biochanin A to genistin and sissotrin, respectively. In the culture of Absidia coerulea, in addition to the sissotrin, the product of glucosylation at position 5 was formed...
January 3, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28040530/correlation-of-cell-surface-proteins-of-distinct-beauveria-bassiana-cell-types-and-adaption-to-varied-environment-and-interaction-with-the-host-insect-cell-surface-associated-proteins-of-b-bassiana
#18
Zhi Yang, Hongyan Jiang, Xin Zhao, Zhuoyue Lu, Zhibing Luo, Xuebing Li, Jing Zhao, Yongjun Zhang
The insect fungal pathogen Beauveria bassiana produces a number of distinct cell types that include aerial conidia, blastospores and haemolymph-derived cells, termed hyphal bodies, to adapt varied environment niches and within the host insect. These cells display distinct biochemical properties and surface structures, and a highly ordered outermost brush-like structure uniquely present on hyphal bodies, but not on any in vitro cells. Here, we found that the outermost structure on the hyphal bodies mainly consisted of proteins associated to structural wall components in that most of it could be removed by dithiothreitol (DTT) or proteinase K...
December 28, 2016: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28032511/isolation-and-characterization-of-2-pyridone-alkaloids-and-alloxazines-from-beauveria-bassiana
#19
W J Andrioli, A A Lopes, B C Cavalcanti, C Pessoa, N P D Nanayakkara, J K Bastos
Two novel compounds bearing heterocyclic nitrogen, 2-pyridone alkaloid (1) and alloxazine derivative (2), along with the known pretenellin B (3), pyridovericin (4) and lumichrome (5) were isolated from a culture of the entomopathogenic fungal strain Beauveria bassiana. The chemical structures of 2-pyridone alkaloid and alloxazine derivative were established on the basis of the interpretation of spectroscopic data. The isolated compounds were evaluated in a panel of five cancer cell lines and pyridovericin exhibited cytotoxicity (IC50, μM) against cancer cell lines: HL-60 (25...
December 29, 2016: Natural Product Research
https://www.readbyqxmd.com/read/28011319/effect-of-vacuolar-atpase-subunit-h-vmah-on-cellular-ph-asexual-cycle-stress-tolerance-and-virulence-in-beauveria-bassiana
#20
Jing Zhu, Xiao-Guan Zhu, Sheng-Hua Ying, Ming-Guang Feng
Vacuolar ATPase (V-ATPase) is a conserved multi-subunit protein complex that mediates intracellular acidification in fungi. Here we show functional diversity of V-ATPase subunit H (BbVmaH) in Beauveria bassiana, a filamentous fungal insect pathogen. Deletion of BbvmaH resulted in elevated vacuolar pH, increased Ca(2+) level in cytosol but not in vacuoles, accelerated culture acidification and reduced accumulation of extracellular ammonia. Aerial conidiation and submerged blastospore production were largely delayed and reduced in the deletion mutant, respectively, accompanied with a significant delay in conidial germination, alterations of conidia and blastospores in morphology, size and/or density, and severe growth defects in minimal media with different carbon and nitrogen sources...
December 21, 2016: Fungal Genetics and Biology: FG & B
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