Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| mmps regulate both development and immunity in the tribolium model insect. | matrix metalloproteinases (mmps) are evolutionarily conserved and multifunctional effector molecules in development and homeostasis. in spite of previous, intensive investigation in vitro and in cell culture, their pleiotrophic functions in vivo are still not well understood. | 2009 | 19270735 |
| uptake of the fluorescent probe fm4-64 by hyphae and haemolymph-derived in vivo hyphal bodies of the entomopathogenic fungus beauveria bassiana. | the entomopathogenic fungus beauveria bassiana is under intensive study as a pest biological control agent. b. bassiana produces several distinct single-cell types that include aerial conidia, in vitro blastospores and submerged conidia. under appropriate nutrient conditions these cells can elaborate germ tubes that form hyphae, which in turn lead to the formation of a fungal mycelium. in addition, b. bassiana displays a dimorphic transition, producing in vivo specific yeast-like hyphal bodies d ... | 2009 | 19542008 |
| the size and ratio of homologous sequence to non-homologous sequence in gene disruption cassette influences the gene targeting efficiency in beauveria bassiana. | targeted gene replacement via homologous recombination (hr) is a conventional approach for the analysis of gene function. however, this event is rare in beauveria bassiana, which hampers efficient functional analysis in this widely used entomopathogenic fungus. to improve homologous recombination frequency in b. bassiana, we investigated the effect of the ratio of homologous sequence to non-homologous sequence (hs/nhs) in gene disruption cassette upon the hr frequency by two gene loci bbntl and ... | 2009 | 19148636 |
| effect of fungal infection on reproductive potential and survival time of tetranychus urticae (acari: tetranychidae). | the effect of fungal infection on the reproductive potential of two-spotted spider mite, tetranychus urticae, was evaluated as part of the full biocontrol potential of three entomopathogenic fungi by modeling of fecundity probability. female mites (<or=2-day-old) on leaves were exposed to the sprays of beauveria bassiana, paecilomyces fumosoroseus and metarhizium anisopliae at the concentrations of 1.13 x 10(3), 1.55 x 10(3) and 0.95 x 10(3) deposited conidia mm(-2) and then individually reared ... | 2009 | 19153812 |
| effects of temperature on metal tolerance and the accumulation of zn and pb by metal-tolerant fungi isolated from urban runoff treatment wetlands. | to investigate the ability of two fungi to accumulate zn and pb, the effect of temperature on their metal tolerance and possible mechanisms involved in metal accumulation. | 2009 | 19187150 |
| community composition, host range and genetic structure of the fungal entomopathogen beauveria in adjoining agricultural and seminatural habitats. | although intensively investigated for biological control of insect pests, little is known about the ecology of the fungal entomopathogenic genus beauveria in natural or agricultural habitats. in this study, we used molecular phylogenetic and genotypic information to infer species diversity, reproductive potential and genetic structure of beauveria occurring within a single arable field and bordering hedgerow in denmark. isolates were sampled from cultivated field and hedgerow soils, from insects ... | 2009 | 19226319 |
| biosynthesis of the cyclooligomer depsipeptide bassianolide, an insecticidal virulence factor of beauveria bassiana. | beauveria bassiana is a facultative entomopathogen with an extremely broad host range that is used as a commercial biopesticide for the control of insects of agricultural, veterinary and medical significance. b. bassiana produces bassianolide, a cyclooligomer depsipeptide secondary metabolite. we have cloned the bbbsls gene of b. bassiana encoding a nonribosomal peptide synthetase (nrps). targeted inactivation of the b. bassiana genomic copy of bbbsls abolished bassianolide production, but did n ... | 2009 | 19285149 |
| real-time quantitative pcr for analysis of candidate fungal biopesticides against malaria: technique validation and first applications. | recent research has indicated that fungal biopesticides could augment existing malaria vector control tools. here we present a set of methodologies to monitor the in vivo kinetics of entomopathogenic fungi in anopheles in the presence or absence of malaria parasites using quantitative real-time pcr. three qpcr assays were successfully developed for counting fungal genomes: "specific" assays capable of distinguishing two well characterized fungal entomopathogens beauveria bassiana isolate imi3915 ... | 2009 | 19320043 |
| selection of native isolates of beauveria bassiana (ascomycetes: clavicipitaceae) for the microbial control of rhipicephalus (boophilus) microplus (acari: ixodidae). | previously undiscovered isolates of beauveria bassiana (balsamo) vuillemin (ascomycetes: clavicipitaceae) able to control rhipicephalus (boophilus) microplus (canestrini) (acari: ixodidae) were obtained for the first time in argentina. the isolates were selected from three sources: 1) soil samples from the provinces of corrientes, formosa, and chaco, where ticks are endemic; 2) dead female ticks; and 3) the fungal collection from the entomopathogenic fungi laboratory of imyza-inta castelar. to s ... | 2009 | 19351079 |
| mitogen-activated protein kinase hog1 in the entomopathogenic fungus beauveria bassiana regulates environmental stress responses and virulence to insects. | beauveria bassiana is an economically important insect-pathogenic fungus which is widely used as a biocontrol agent to control a variety of insect pests. however, its insecticide efficacy in the field is often influenced by adverse environmental factors. thus, understanding the genetic regulatory processes involved in the response to environmental stress would facilitate engineering and production of a more efficient biocontrol agent. here, a mitogen-activated protein kinase (mapk)-encoding gene ... | 2009 | 19363067 |
| comparative tolerances of various beauveria bassiana isolates to uv-b irradiation with a description of a modeling method to assess lethal dose. | the tolerances of 20 beauveria bassiana isolates derived from host insects worldwide to uv-b irradiation were assessed quantitatively in multi-dose bioassays. conidial suspensions of the isolates smeared on glass slides were exposed to the gradient uv-b doses of 0.1-1.6 j cm(-2) (d), which generated from 0.75 to 10.17 min irradiation of weighted 312-nm wavelength at 2.0-2.61 mw cm(-2). irradiated conidia were then incubated for 24 h at 25 degrees c under saturated humidity. the ratio of germinat ... | 2009 | 19390989 |
| cytotoxic and hle-inhibitory tetramic acid derivatives from marine-derived fungi. | tetramic acid derivatives are an important class of nitrogen heterocycles with a pyrrolidine-2,4-dione core as a key structural motif. from the sponge-derived fungus beauveria bassiana, a new equisetin-like tetramic acid derivative, beauversetin (1), was isolated. the sea weed-derived fungus microdiplodia sp. produced the tetramic acid derivative 2 (sch210972) which was shown to inhibit human leucocyte elastase (hle) with an ic50 of 1.04 microg ml(-1). | 2009 | 19413111 |
| control of pyrethroid-resistant chagas disease vectors with entomopathogenic fungi. | triatoma infestans-mediated transmission of tripanosoma cruzi, the causative agent of chagas disease, remains as a major health issue in southern south america. key factors of t. infestans prevalence in specific areas of the geographic gran chaco region-which extends through northern argentina, bolivia, and paraguay-are both recurrent reinfestations after insecticide spraying and emerging pyrethroid-resistance over the past ten years. among alternative control tools, the pathogenicity of entomop ... | 2009 | 19434231 |
| a laboratory evaluation to determine the compatibility of microbiological control agents with the pollinator bombus terrestris. | this study was undertaken to identify any potential adverse side effects of the use of seven microbiological control agents (mcas) on the bumblebee, bombus terrestris l., in the context of combined use in integrated pest management (ipm). aq10 (ampelomyces quisqualis), binab-t-vector (hypocrea parapilulifera + t. atroviride; 1/1), prestop-mix (gliocladium catenulatum j1446), serenade (bacillus subtilis qst713), trianum-p (trichoderma harzianum t22), botanigard (beauveria bassiana gha) and granup ... | 2009 | 19437453 |
| relationship between virulence and repellency of entomopathogenic isolates of metarhizium anisopliae and beauveria bassiana to the termite macrotermes michaelseni. | termites encounter a diverse array of potentially useful and harmful fungi in their subterranean habitats. these vary from symbiotic to harmful species with varying levels of virulence. how these hemiedaphic insects survive in habitats with infective fungi is not well understood. possible mediation of olfactory signals in avoiding contact with entomopathogenic fungi has been explored by a number of workers. in the present study, we initially found that macrotermes michaelseni detected a virulent ... | 2009 | 19442668 |
| antagonistic interactions between garden yeasts and microfungal garden pathogens of leaf-cutting ants. | we investigate the diversity of yeasts isolated in gardens of the leafcutter ant atta texana. repeated sampling of gardens from four nests over a 1-year time period showed that gardens contain a diverse assemblage of yeasts. the yeast community in gardens consisted mostly of yeasts associated with plants or soil, but community composition changed between sampling periods. in order to understand the potential disease-suppressing roles of the garden yeasts, we screened isolates for antagonistic ef ... | 2009 | 19449210 |
| selection of improved beauveria bassiana (bals.) vuill. strains based on 2-deoxy-d-glucose resistance and physiological analysis. | a series of 2-deoxy-d-glucose resistant mutants was obtained from wild type beauveria bassiana 88 (bb 88) by uv irradiation. five mutants were characterized on sabouraud dextrose agar and chitin agar for both radial extension rate (v(r)) and specific growth rate (micro). these values were obtained after adjusting morphometric data to a mathematical model used for filamentous fungi. additionally, the protease and lipase potency index, conidial size, viability, and production levels were analyzed. ... | 2009 | 19463827 |
| spore persistence and likelihood of aeroallergenicity of entomopathogenic fungi used for mosquito control. | entomopathogenic fungi, such as metarhizium anisopliae and beauveria bassiana, are being researched as alternatives to chemical adulticides to control mosquito vectors of malaria and dengue. two cited concerns of fungal control include conidial viability and risks fungal entomopathogens pose to human health. we measured spore viability of 10 fungal isolates over 26 weeks and found a range of persistence. three b. bassiana isolates maintained > or = 50% viability 14 weeks after application. no m. ... | 2009 | 19478264 |
| genetic diversity among brazilian isolates of beauveria bassiana: comparisons with non-brazilian isolates and other beauveria species. | the genetic diversity of beauveria bassiana was investigated by comparing isolates of this species to each other (49 from different geographical regions of brazil and 4 from usa) and to other beauveria spp. | 2009 | 19486413 |
| systemic protection of papaver somniferum l. against iraella luteipes (hymenoptera: cynipidae) by an endophytic strain of beauveria bassiana (ascomycota: hypocreales). | the poppy stem gall wasp, iraella luteipes (thompson) (hymenoptera: cynipidae), is one of the main pests of the opium poppy, papaver somniferum l., an economically important pharmaceutical crop cultivated worldwide. in a previous study, we obtained from i. luteipes larvae a strain of the entomopathogenic fungus beauveria bassiana (ascomycota: hypocreales) that can become established endophytically in opium poppy plants. a field experiment was conducted to study the ability of this b. bassiana st ... | 2009 | 19508781 |
| a beauvericin hot spot in the genus isaria. | beauvericin is a naturally occurring cyclohexadepsipeptide originally described from beauveria bassiana but also reported from several fusarium species as well as members of the genus isaria. twenty-six isolates of isaria species and its cordyceps teleomorph, and ten taxonomically close strains including beauveria, nomuraea and paecilomyces species were sequenced and tested for beauvericin production. trees using its rdna and beta-tubulin sequence data were constructed and used to infer the phyl ... | 2009 | 19766720 |
| [potential of metarhizium anisopliae and beauveria bassiana isolates and neem oil to control the aphid lipaphis erysimi (kalt.) (hemiptera: aphididae)]. | this work aimed to determine the efficiency of the entomopathogenic fungi metarhizium anisopliae and beauveria bassiana to control the aphid lipaphis erysimi (kalt.) (hemiptera: aphididae) in kale brassica oleracea var acephala d.c., as well as their compatibility with a neem oil formulation (neemseto). ten isolates of both fungi were tested and the most pathogenic ones were b. bassiana cg001 and m. anisopliae cg30 with 90% and 4.4 days, and 64% and 3.8 days of mortality and median lethal time, ... | 2009 | 19768273 |
| fungal infection counters insecticide resistance in african malaria mosquitoes. | the evolution of insecticide resistance in mosquitoes is threatening the effectiveness and sustainability of malaria control programs in various parts of the world. through their unique mode of action, entomopathogenic fungi provide promising alternatives to chemical control. however, potential interactions between fungal infection and insecticide resistance, such as cross-resistance, have not been investigated. we show that insecticide-resistant anopheles mosquitoes remain susceptible to infect ... | 2009 | 19805146 |
| interaction between beauveria bassiana and bacillus thuringiensis var. israelensis for the control of house fly larvae and adults in poultry houses. | field trials were carried out in the poultry houses to determine if a spray formulation of beauveria bassiana (balsamo) vuillemin isolate r444 would enhance the control potential of bacillus thuringiensis var. israelensis (bti) applied in chicken feed as a larvicide against house fly larvae and the emergence of adult house flies. the trials compared larval mortalities and adult house fly emergence that resulted from the bti plus b. bassiana treatments with those resulting from a commercial larvi ... | 2009 | 19834080 |
| [synergistic action of entomopathogenic hyphomycetes and the bacteria bacillus thuringiensis ssp. morrisoni in the infection of colorado potato beetle leptinotarsa decemlineata]. | a synchronous coinfection of the colorado potato beetle leptinotarsa decemlineata (say) with the entomopathogenic bacteria bacillus thuringiensis ssp. morrisoni bonnifoi & de barjak var. tenebrionis krieg et al. and hyphomycete metarhizium anisopliae (metsch.) sorokin or beauveria bassiana (bals.) vuill leads to the rapid death of 95-100% of larvae. the bacteria arrest the nutrition of insects, while the fungal spores kill the weakened larvae. the synergistic effect of two pathogens is recorded ... | 2009 | 19845290 |
| a case of necrotizing sclerokeratitis and endophthalmitis caused by beauveria bassiana. | 2009 | 19847617 | |
| microbial metabolism. part 10: metabolites of 7,8-dimethoxyflavone and 5-methoxyflavone. | microbial transformation of 7,8-dimethoxyflavone (1) by mucor ramannianus produced five metabolites: 7,8-dimethoxy-4'-hydroxyflavone (2), 3',4'-dihydroxy-7,8-dimethoxyflavone (3), 7,3'-dihydroxy-8-methoxyflavone (4), 7,4'-dihydroxy-8-methoxyflavone (5) and 8-methoxy-7,3',4'-trihydroxyflavone (6). it was, however, completely converted to a single metabolite, 7-hydroxy-8-methoxyflavone (7) by aspergillus flavus. 5-methoxyflavone (8), when fermented with beauveria bassiana, gave a single product, 5 ... | 2009 | 19731142 |
| evaluation of soyscreen in an oil-based formulation for uv protection of beauveria bassiana conidia. | soyscreen oil was studied as a formulation ingredient to protect beauveria bassiana (balsamo) vuillemin conidia from uv degradation. feruloylated soy glycerides, referred to as soyscreen oil, are biobased uv-absorbing molecules made by combining molecules of soybean oil with ferulic acid. conidia stored in soyscreen oil for 28 wk at 25, 30, and 35 degrees c retained viability as well as conidia stored in sunflower oil, demonstrating that soyscreen did not adversely affect viability with prolonge ... | 2009 | 19886439 |
| infection of the malaria mosquito, anopheles gambiae, with two species of entomopathogenic fungi: effects of concentration, co-formulation, exposure time and persistence. | entomopathogenic fungi metarhizium anisopliae and beauveria bassiana isolates have been shown to infect and reduce the survival of mosquito vectors. | 2009 | 20030834 |
| [selection of isolates of entomopathogenic fungus beauveria bassiana (ascomycetes: clavicipitaceae) for control of rhipicephalus (boophilus) microplus (acari: ixodidae)]. | this study was carried out to select isolates of the entomopathogenic fungus beauveria bassiana with pathogenic potential to control the rhipicephalus (boophilus) microplus tick. the effectiveness of thirty isolates was first tested at a concentration of 5 x 108 conidia.ml(-1). of these, eight were evaluated (ibcb01, ibcb02, ibcb07, ibcb17, ibcb21, ibcb74, ibcb149, ibcb165) and showed an effectiveness between 90 and 99%; thirteen (ibcb03, ibcb14, ibcb16, ibcb24, ibcb95, ibcb97, ibcb102, ibcb141, ... | 2009 | 20040184 |
| [determination of lc 90 and lt 90 of ibcb66 beauveria bassiana (ascomycetes: clavicipitaceae) isolate for rhipicephalus (boophilus) microplus (acari: ixodidae) control]. | the objective of this research was to evaluate the pathogenicity and the virulence of the ibcb66 isolate of beauveria bassiana on infected larvae of rhipicephalus (boophilus) microplus. the ibcb66 fungus strain was used as standard isolates of b. bassiana against r. (b.) microplus larvae. the larval bioassay tests using the ibcb66 isolate were carried out to determine the (lethal concentration) lc50, lc90, (lethal time) lt50 and lt90. the ibcb66 fungus strain was tested at six different concentr ... | 2009 | 20040188 |
| [compatibility of beauveria bassiana (ascomycetes: clavicipitaceae) with chemicals acaricides used in the control of cattle tick]. | the purpose of the present study was to assess compatibility between ibcb66 and ibcb21 isolates of beauveria bassiana and acaricides: flumethrin+coumaphos, deltamethrin, dichlorvos+cypermethrin, dichlorvos+chlorpyrifos, cypermethrin high cis, dichlorvos+cypermethrin high cis, cypermethrin and amitraz, utilized on the control of rhipicephalus (boophilus) microplus in our country. the effect of commercial products on the isolates was assayed according to observation of vegetative growth, conidia p ... | 2009 | 20040194 |
| soil application of beauveria bassiana to control ceratitis capitata in semi field conditions. | the mediterranean fruit fly ceratitis capitata (wiedemann) is a highly polyphagous pest of economic importance cultures in syria, as in many other parts of the world. the potential of the entomopathogenic fungus beauveria bassiona bals (vuil.) strain 412 against adults of mediterranean fruit fly c. capitata was evaluated in semi field conditions during the summer. soil (5-7 cm high) was filled into plastic container (27 cm x 32 cm). in one container 75 pupae, two days before emergency, were spre ... | 2009 | 20222591 |
| construction of beauveria bassiana t-dna insertion mutant collections and identification of thermosensitive and osmosensitive mutants. | this study was to identify genes involved in thermotolerance and osmotolerance of beauveria bassiana. | 2009 | 20069875 |
| [susceptibility of the parasitoid phymastichus coffea lasalle (hymenoptera: eulophidae) to beauveria bassiana under laboratory conditions]. | the coffee berry borer, hypothenemus hampei (ferrari) (coleoptera: curculionidae), is the most important coffee pest worldwide. beauveria bassiana is a generalist entomopathogenic fungus widely used by coffee farmers to control this pest and phymastichus coffea lasalle (hymenoptera: eulophidae) is an african endoparasitoid of h. hampei adults, recently imported to several latin american and caribbean countries to aid in the coffee berry borer control. the objective of this study was to determine ... | 2009 | 19943017 |
| [selectivity of beauveria bassiana and metarhizium anisopliae to trichogramma pretiosum riley (hymenoptera: trichogrammatidae)]. | trichogramma pretiosum riley and the entomopathogenic fungi beauveria bassiana and metarhizium anisopliae are efficient biological control agents and are thought to be used jointly. in here, we investigated if these entomopathogens could have any side-effects on t. pretiosum. therefore, 1 x 8 cards containing sterilized eggs of anagasta kuehniella (zeller) that were sprayed with 0.2 ml of b. bassiana or m. anisopliae (1.0 x 10(9) conidia/ml) were offered to a t. pretiosum female for 24h (30 card ... | 2009 | 20098929 |
| combinatorial mutasynthesis of scrambled beauvericins, cyclooligomer depsipeptide cell migration inhibitors from beauveria bassiana. | fungal cyclooligomer depsipeptides such as beauvericin, bassianolide, and enniatins display antibiotic, antifungal, insecticidal, broad-spectrum cancer cell antiproliferative, and cell migration inhibitory activities. we have identified a gene encoding a novel enzyme, ketoisovalerate reductase (kivr), which is the sole provider of d-hydroxyisovalerate (d-hiv), a common precursor for cyclooligomer depsipeptide biosynthesis in beauveria bassiana. kivr and related hypothetical oxidoreductases encod ... | 2009 | 19105175 |
| physiological implication of intracellular trehalose and mannitol changes in response of entomopathogenic fungus beauveria bassiana to thermal stress. | to explore possible role of intracellular trehalose accumulation in fungal tolerance to summer-like thermal stress, 3-day colonies of beauveria bassiana grown on a glucose-free medium at 25 degrees c were separately exposed to 35, 37.5 and 40 degrees c for 1-18 h, respectively. trehalose accumulation in stressed mycelia increased from initial 4.2 to 88.3, 74.7 and 65.5 mg g(-1) biomass after 6-h stress at 35, 37.5 and 40 degrees c, respectively, while intracellular mannitol level generally decli ... | 2009 | 18850325 |
| molecular characterization of a subgroup ie intron with wide distribution in the large subunit rrna genes of dermatophyte fungi. | group i introns have the ability to catalyse their own excision (self-splice) from pre-rna, and are found in a wide range of eukaryotic organisms. in fungal nuclear genomes, they have been identified in the small subunit (ssu) and large subunit (lsu) of the ribosomal rna gene. sequencing of the 3' region of the lsu rrna gene of the dermatophyte trichophyton interdigitale revealed a 393 bp group i intron, tin.2563, containing the four characteristic conserved motifs (p,q,r and s) essential for se ... | 2009 | 18949625 |
| influence of temperature on virulence of fungal isolates of metarhizium anisopliae and beauveria bassiana to the two-spotted spider mite tetranychus urticae. | twenty-three isolates of metarhizium anisopliae (metschnikoff) sokorin and three isolates of beauveria bassiana (balsamo) vuillemin (ascomycota: hypocreales: clavicipitaceae) were assessed for their virulence against the two-spotted spider mite, tetranychus urticae koch (acari: tetranychidae). based on the screening results, nine isolates of m. anisopliae and two isolates of b. bassiana were tested for their virulence against young adult (1- to 2-day-old) female t. urticae at constant temperatur ... | 2009 | 18987988 |
| relationships among activities of extracellular enzyme production and virulence against helicoverpa armigera in beauveria bassiana. | extracellular enzymes produced by beauveria bassiana, are believed to play a key role in cuticle hydrolysis. enzyme production and pathogenicity has been found to be positively correlated. twenty-eight isolates of b. bassiana, collected from different geographical regions and host ranges were characterized by in vitro extracellular enzyme production and sds-page techniques for discerning biochemical basis for virulence among the different isolates. in vitro analysis of extracellular enzymes like ... | 2009 | 19025880 |
| effects of sheep fleece washings on the germination and growth of beauveria bassiana. | the development of biopesticides against ectoparasites must take into account the effect that an animal host's secretions and host associated micro-organisms may have on the viability of the applied agent. in this study, the effects of secretions washed from the pelt of sheep on the viability and growth of the fungal pathogen beauveria bassiana, were assessed. the fungal isolate had been obtained from the parasitic sheep scab mite psoroptes ovis. it was added to 0.05% tween 80 in which sheep fle ... | 2009 | 19041656 |
| cold stress increases resistance to fungal infection throughout life in drosophila melanogaster. | flies were subjected to one of three mild stresses known to have positive effects on longevity (heat, hypergravity, cold), prior to an infection with the entomopathogenic fungus beauveria bassiana. flies subjected to cold survived longer to infection, while the other mild stresses had no positive effect. these positive effects of a cold stress on resistance to infection were observed mainly in males and throughout life, i.e., a long time after the cold stress was applied. it was confirmed that c ... | 2009 | 19067222 |
| entomopathogens (beauveria bassiana and steinernema carpocapsae) for biological control of bark-feeding moth indarbela dea on field-infested litchi trees. | the bark-feeding moth indarbela dea (swinhoe) is one of the major pests of litchi (litchi chinensis sonn.) in asia. effects on larval mortality and web production were tested by repeated, single and combined tree trunk applications of the entomopathogenic fungus beauveria bassiana (bals.) vuill. and the entomopathogenic nematode steinernema carpocapsae (weiser). two separate application trials were conducted in different seasons on young and older larvae respectively. | 2009 | 18823078 |
| up-regulation of lysozyme gene expression during metamorphosis and immune challenge of the cotton bollworm, helicoverpa armigera. | lysozymes act as crucial bacteriolytic enzymes in insect immune system by hydrolyzing the beta (1-->4) bonds between n-acetylglucosamine and n-acetylmuramic acid in the peptidoglycan of prokaryotic cell walls. we have isolated and characterized a helicoverpa armigera cdna encoding an insect lysozyme named halyz. we amplified a fragment by pcr, using degenerate primers derived from the conservative amino acid sequences for performing 5' and 3' race. the full-length cdna was 661 base pairs. the th ... | 2009 | 18615707 |
| copulation enhances resistance against an entomopathogenic fungus in the mealworm beetle tenebrio molitor. | ecological immunology is based upon the notion that activation and use of the immune system is costly and should thus be traded off against other energy-demanding aspects of life history. most of the studies on insects that have examined the possibility that mating results in trade-offs with immunity have shown that mating has immunosuppressive effects. the connection between mating and immunity has traditionally been investigated using indirect measures of immunity. however, studies that have a ... | 2010 | 20128944 |
| requirement of a mitogen-activated protein kinase for appressorium formation and penetration of insect cuticle by the entomopathogenic fungus beauveria bassiana. | beauveria bassiana is an important insect-pathogenic fungus that invades insects by direct penetration of the host cuticle. to delineate the molecular mechanisms involved in fungal infection, a mitogen-activated protein kinase (mapk) gene, bbmpk1, which encodes a yerk1 family mapk was isolated and characterized. targeted gene disruption of bbmpk1 resulted in a complete loss of virulence when applied topically to host insects but did not affect growth of the fungus when conidia were injected dire ... | 2010 | 20139313 |
| hydrophobicity-related protein contents and surface areas of aerial conidia are useful traits for formulation design of fungal biocontrol agents. | to clarify the potential use of hydrophobicity-related traits of aerial conidia in formulation design of fungal biocontrol agents, hydrophobicity rates (h (r)) and surface areas (s (a)) of aerial conidia were assessed with 48 strains of beauveria bassiana, isaria fumosorosea and metarhizium spp. inter- or intra-specific variation was large in h (r) (59.7-92.2%) and s (a) (7.9-25.3 microm(2) conidium(-1)) measurements, which were significantly correlated (r (2) = 0.55). six isolates of the three ... | 2010 | 20155444 |
| effects of carbon concentrations and carbon to nitrogen ratios on sporulation of two biological control fungi as determined by different culture methods. | the nematophagous fungus pochonia chlamydosporia (clavicipitaceae) and entomopathogenic fungus beauveria bassiana (cordycipitaceae) have great potential for biological control. however, a significant barrier to their commercial development as mycopesticides is the high costs associated with production. carbon (c) concentration and c to nitrogen ratio (c:n ratio) greatly affect fungal growth and sporulation. effects of c concentration and c:n ratio differed when the fungi were cultivated using tw ... | 2010 | 20155445 |
| susceptibility of preimaginal western cherry fruit fly, rhagoletis indifferens (diptera: tephritidae) to beauveria bassiana (balsamo) vuillemin clavicipitaceae (hypocreales). | last-instar larvae of the western cherry fruit fly, rhagoletis indifferens, were subjected to beauveria bassiana gha incorporated into sterile sand and non-sterile orchard soil. mycosis in the pupal stage was observed in >20% of buried r. indifferens pupae and >80% of larvae entering sand treated with either of two b. bassiana isolates. when pre-pupal larvae burrowed into conidium-treated non-sterile cherry orchard soil, the incidence of mycosis, on both the puparia and internally developing pup ... | 2010 | 20171971 |
| 4'-o-methylglycosylation of curcumin by beauveria bassiana. | the applications of curcumin have been limited by its poor water solubility and low bioavailability. in this study, we successfully synthesized a new curcumin derivative, curcumin-8'-o-4"-o-methyl-beta-d-glucopyranoside, by biotransformation with the fungal strain beauveria bassiana atcc 7159. the structure of this new product was determined on the basis of spectroscopic data. this is the first record of a curcumin glycoside that has been synthesized by a fungus. | 2010 | 20184026 |
| the drosophila prr gnbp3 assembles effector complexes involved in antifungal defenses independently of its toll-pathway activation function. | the drosophila toll-signaling pathway controls the systemic antifungal host response. gram-negative binding protein 3 (gnbp3), a member of the beta-glucan recognition protein family senses fungal infections and activates this pathway. a second detection system perceives the activity of proteolytic fungal virulence factors and redundantly activates toll. gnbp3(hades) mutant flies succumb more rapidly to candida albicans and to entomopathogenic fungal infections than wt flies, despite normal trigg ... | 2010 | 20201042 |
| the infectivity of the entomopathogenic fungus beauveria bassiana to insecticide-resistant and susceptible anopheles arabiensis mosquitoes at two different temperatures. | control of the major african malaria vector species continues to rely extensively on the application of residual insecticides through indoor house spraying or bed net impregnation. insecticide resistance is undermining the sustainability of these control strategies. alternatives to the currently available conventional chemical insecticides are, therefore, urgently needed. use of fungal pathogens as biopesticides is one such possibility. however, one of the challenges to the approach is the poten ... | 2010 | 20210990 |
| integration of insecticidal protein vip3aa1 into beauveria bassiana enhances fungal virulence to spodoptera litura larvae by cuticle and per os infection. | the entomopathogenic fungus beauveria bassiana acts slowly on insect pests through cuticle infection. vegetative insecticidal proteins (vip3a) of bacillus thuringiensis kill lepidopteran pests rapidly, via per os infection, but their use for pest control is restricted to integration into transgenic plants. a transgenic b. bassiana strain (bbv28) expressing vip3aa1 (a vip3a toxin) was thus created to infect the larvae of the oriental leafworm moth spodoptera litura through conidial ingestion and ... | 2010 | 20495052 |
| molecular characterization and virulence of beauveria spp. from the pine processionary moth, thaumetopoea pityocampa (lepidoptera: thaumetopoeidae). | the pine processionary moth thaumetopoea pityocampa (den. & schiff.) is one of the most harmful pests to pine species in mediterranean countries including turkey. caterpillars of t. pityocampa are not only significantly harmful to forest trees but also responsible for various allergic reactions in humans and animals. in this study, in order to find a more effective and safe biological control agent against t. pityocampa, we investigated fungal pathogens of t. pityocampa in the black sea region o ... | 2010 | 20499189 |
| structure determination of two new monocillin i derivatives. | biotransformation of monocillin i (1) by beauveria bassiana atcc 7159 was investigated. two new derivatives 2 and 3 were isolated and identified on the basis of the spectroscopic data. compounds 2 and 3 are synthesized by hydration at 10,11-double bond and hydrolysis of 14,15-epoxide, respectively. the r configuration of 11-oh in 2 was established by the modified 2-methoxy-2-trifluoromethylphenylacetic acid (mtpa) method. the conversion of 1 to 2 and 3 was reconstituted in an acid solution, indi ... | 2010 | 20521550 |
| chitosan increases conidiation in fungal pathogens of invertebrates. | antifungal activity of chitosan on plant pathogenic fungi has been widely studied, but little is known about the effect of chitosan on fungal biocontrol agents. in this work, we characterize the increase of conidiation induced by chitosan in fungal pathogens of invertebrates (fpi). chitosan increased conidiation of fpi, including beauveria bassiana, widely used as mycoinsecticide, and did not affect conidia viability or pathogenicity. increased conidiation induced by chitosan is shown to be conc ... | 2010 | 20532757 |
| in vitro effects of flutriafol and azoxystrobin on beauvaria bassiana and its efficacy against tetranychus urticae. | testing the compatibility of chemical pesticides and fungal biocontrol agents is necessary if these two agents are to be applied together in the integrated management of plant pests and diseases. in this study, the fungicides azoxystrobin (a strobilurin) and flutriafol (a triazole) were tested in vitro for their effects on germination of conidia and mycelial growth of beauveria bassiana (bals.) vuill. and in bioassay for their effect on fungal activity against tetranychus urticae koch. the fungi ... | 2010 | 20533452 |
| haemolymph protein and lipid profile of rhipicephalus (boophilus) microplus infected by fungi. | the current study evaluates the protein and lipid profile of haemolymph of rhipicephalus (boophilus) microplus engorged females infected by metarhizium anisopliae, beauveria bassiana or fusarium oxysporum. ticks were immersed or inoculated with conidial suspension. haemolymph was collected from the dorsal surface of engorged females. the results showed altered total protein amounts; however, no significant difference was observed on electrophoretic profile among haemolymph samples. in addition, ... | 2010 | 20537114 |
| debilitation in conidia of the entomopathogenic fungi beauveria bassiana and metarhizium anisopliae and implication with respect to viability determinations and mycopesticide quality assessments. | germination of beauveria bassiana (bb) and metarhizium anisopliae (ma) conidia determined from a fast-rehydration (fr) protocol were compared to those obtained when dry conidia were subjected to slow rehydration (sr) by holding under high humidity conditions prior to aqueous suspension. differences in viability estimates obtained using the fr vs. sr protocols increased markedly after conidia were exposed to various stress factors in storage (high a(w), temperature, and o(2) concentrations), with ... | 2010 | 20546750 |
| effects of steam-distilled shoot extract of tagetes minuta (asterales: asteraceae) and entomopathogenic fungi on larval tetanops myopaeformis. | interactions of a biopesticidal formulation of steam distilled shoot extract of mexican marigold, tagetes minuta, and entomopathogenic fungi were evaluated for management of the sugarbeet root maggot, tetanops myopaeformis (röder). shoot extract plus surfactant (e-z mulse) (=t. minuta oil) was used in a 65:35 ratio to test the hypothesis that this fungicidal and nematocidal biopesticide causes dose-dependent mortality and developmental arrest of t. myopaeformis but does not interfere with the ac ... | 2010 | 20550813 |
| phylogenetic and biogeographic implications inferred by mitochondrial intergenic region analyses and its1-5.8s-its2 of the entomopathogenic fungi beauveria bassiana and b. brongniartii. | the entomopathogenic fungi of the genus beauveria are cosmopolitan with a variety of different insect hosts. the two most important species, b. bassiana and b. brongniartii, have already been used as biological control agents of pests in agriculture and as models for the study of insect host - pathogen interactions. mitochondrial (mt) genomes, due to their properties to evolve faster than the nuclear dna, to contain introns and mobile elements and to exhibit extended polymorphisms, are ideal too ... | 2010 | 20553589 |
| pyrethroid resistance in anopheles gambiae leads to increased susceptibility to the entomopathogenic fungi metarhizium anisopliae and beauveria bassiana. | entomopathogenic fungi are being investigated as a new mosquito control tool because insecticide resistance is preventing successful mosquito control in many countries, and new methods are required that can target insecticide-resistant malaria vectors. although laboratory studies have previously examined the effects of entomopathogenic fungi against adult mosquitoes, most application methods used cannot be readily deployed in the field. because the fungi are biological organisms it is important ... | 2010 | 20553597 |
| histopathology caused by the entomopathogenic fungi, beauveria bassiana and metarhizium anisopliae, in the adult planthopper, peregrinus maidis, a maize virus vector. | the planthopper peregrinus maidis (ashmead) (hemiptera: delphacidae) is an important vector of maize viruses in tropical and subtropical areas. planthoppers are biologically controlled with several species of entomopathogenic fungi that have been isolated from these insect pests of rice in asia. beauveria bassiana (balsamo-crivelli) vuillemin and metarhizium anisopliae (metschnikoff) sorokin (hypocreales: clavicipitaceae) appear to be the most useful against planthoppers because of their ease of ... | 2010 | 20578956 |
| endophytic and entomopathogenic strains of beauveria sp to control the bovine tick rhipicephalus (boophilus) microplus. | pathogenicity of strains of the entomopathogenic fungus beauveria bassiana and endophytic strains of beauveria sp against the bovine tick rhipicephalus (boophilus) microplus was tested in laboratory bioassays and under field conditions. suspensions containing 10(5), 10(7) and 10(9) conidia/ml were prepared of each fungal strain for laboratory bioassays. the ticks were maintained at 28 degrees c, 90 +/- 5% relative humidity, and the following variables were evaluated: initial female weight, egg w ... | 2010 | 20662157 |
| a fungal pathogen in time and space: the population dynamics of beauveria bassiana in a conifer forest. | the fungal entomopathogen beauveria bassiana is ubiquitous in below-ground systems; however, there is a dearth of information on the above-ground diversity, temporal and spatial distribution of this fungus. therefore, we assessed its occurrence in a conifer forest (pseudotsuga monziesii and pinus nigra var. maritima) using selective media to isolate b. bassiana from soil, branch and bark samples collected in october 2005, march and june 2006. fungal density was the highest at all locations in oc ... | 2010 | 20662927 |
| fungi associated with the hemlock woolly adelgid, adelges tsugae, and assessment of entomopathogenic isolates for management. | fungi associated with the hemlock wooly adelgid, adelges tsugae annand (hemiptera: adelgidae), were collected throughout the eastern usa and southern china. twenty fungal genera were identified, as were 79 entomopathogenic isolates, including: lecanicillium lecanii (zimmermann) (hypocreales: insertae sedis), isaria farinosa (holm: fries.) (cordycipitaceae), beauveria bassiana (balasamo) (hyphomycetes), and fusarium spp (nectriaceae). the remaining fungal genera associated with insect cadavers we ... | 2010 | 20672977 |
| insect-toxic secreted proteins and virulence of the entomopathogenic fungus beauveria bassiana. | fungal virulence has been mostly associated with cuticle-degrading enzymes that can be regulated depending on nutrient conditions. however, few studies have related fungal virulence to insect-toxic secreted proteins. here, we describe how the presence of secreted toxic proteins may be linked to conidial virulence, which can be affected by nutrient factors. in this study we evaluated: (1) the virulence of the conidia of four beauveria bassiana strains (eabb 01/103-su, eabb 01/12-su, eabb 01/88-su ... | 2010 | 20674578 |
| increased virulence using engineered protease-chitin binding domain hybrid expressed in the entomopathogenic fungus beauveria bassiana. | insect cuticles consist mainly of interlinked networks of proteins and the highly insoluble polysaccharide, chitin. entomopathogenic fungi, such as beauveria bassiana, invade insects by direct penetration of host cuticles via the action of diverse hydrolases including proteases and chitinases coupled to mechanical pressure. in order to better target cuticle protein-chitin structures and accelerate penetration speed, a hybrid protease (cdep-bmchbd) was constructed by fusion of a chitin binding do ... | 2010 | 20674735 |
| [cloning and expression of the osmotic tolerance gene bbmpd of beauveria bassiana]. | we isolate the gene involved in osmotolerance of beauveria bassiana for investigation the adaptation mechanism of the fungus to adversity. | 2010 | 20687335 |
| synergy in efficacy of fungal entomopathogens and permethrin against west african insecticide-resistant anopheles gambiae mosquitoes. | increasing incidences of insecticide resistance in malaria vectors are threatening the sustainable use of contemporary chemical vector control measures. fungal entomopathogens provide a possible additional tool for the control of insecticide-resistant malaria mosquitoes. this study investigated the compatibility of the pyrethroid insecticide permethrin and two mosquito-pathogenic fungi, beauveria bassiana and metarhizium anisopliae, against a laboratory colony and field population of west africa ... | 2010 | 20711409 |
| anopheline and culicine mosquitoes are not repelled by surfaces treated with the entomopathogenic fungi metarhizium anisopliae and beauveria bassiana. | abstract: | 2010 | 20799937 |
| tools for delivering entomopathogenic fungi to malaria mosquitoes: effects of delivery surfaces on fungal efficacy and persistence. | entomopathogenic fungi infection on malaria vectors increases daily mortality rates and thus represents a control measure that could be used in integrated programmes alongside insecticide-treated bed nets (itns) and indoor residual spraying (irs). before entomopathogenic fungi can be integrated into control programmes, an effective delivery system must be developed. | 2010 | 20799967 |
| production of thermotolerant entomopathogenic fungal conidia on millet grain. | thermotolerance of entomopathogenic (insect-killing) fungi should be seriously considered before industrialization. this work describes the feasibility of millet grain as a substrate for production of thermotolerant beauveria bassiana (bb) gha and erl1170 and metarhizium anisopliae (ma) erl1171 and erl1540 conidia. first, conidial suspensions of the bb isolates, produced on millet grain in polyethylene bags, were exposed to five temperatures (43-47°c) at 15-min intervals for up to 120 min (exper ... | 2010 | 20803242 |
| effects of culture media on hydrophobicity and thermotolerance of bb and ma conidia, with description of a novel surfactant based hydrophobicity assay. | hypocrealean entomopathogenic fungal conidia are made up of multi-aged groups given their chronological conidiogenesis. most thermotolerance assays have been conducted using mixed-age conidia. the present work exploited a polysiloxane polyether copolymer (siloxane) (silwet l-77®) mediated conidial collection method, validated by a hydrophobicity assay. this was done to divide mixed-age conidia into two groups based on hydrophobicity and test their thermotolerance, relying on the relationship of ... | 2010 | 20807540 |
| the entomopathogenic fungus beauveria bassiana reduces instantaneous blood feeding in wild multi-insecticide-resistant culex quinquefasciatus mosquitoes in benin, west africa. | abstract: | 2010 | 20843321 |
| beauveria bassiana infection alters colony development and defensive secretions of the beetles tribolium castaneum and ulomoides dermestoides (coleoptera: tenebrionidae). | we studied the effect of the entomopathogenic fungus beauveria bassiana strain gha on a) colony development of the beetles tribolium castaneum (herbst) and ulomoides dermestoides (fairmaire) (coleoptera: tenebrionidae) under laboratory conditions; and 2) the volatile blend released by both beetles, containing defensive pheromones, by using the solid phase microextraction technique. colony development of both species was strongly altered 3 mo after treatment with b. bassiana, showing a significan ... | 2010 | 20857716 |
| infection of anopheles gambiae mosquitoes with entomopathogenic fungi: effect of host age and blood-feeding status. | physiological characteristics of insects can influence their susceptibility to fungal infection of which age and nutritional status are among the most important. an understanding of host-pathogen interaction with respect to these physiological characteristics of the host is essential if we are to develop fungal formulations capable of reducing malaria transmission under field conditions. here, two independent bioassays were conducted to study the effect of age and blood-feeding status on fungal ... | 2010 | 20872014 |
| plant oils for improving thermotolerance of beauveria bassiana. | conidia of beauveria bassiana arsef-7060 produced in millet amended with plant oils such as sunflower, corn, or cotton seed oil, were exposed to 45 degrees c of wet heat for 90 min. conidia from millet+corn oil medium had the highest thermotolerance (lt50 (median survival time): 45.7 min). the mycotized millet grains were coated with each of the same plant oils as a granular formulation and subjected to 50 degrees c of dry heat for 8 h. corn oil coating (lt50: 8.68 h) was superior to sunflower- ... | 2010 | 20890101 |
| flexible metabolism in metarhizium anisopliae and beauveria bassiana: role of the glyoxylate cycle during insect pathogenesis. | insect pathogenic fungi such as metarhizium anisopliae and beauveria bassiana have an increasing role in the control of agricultural insect pests and vectors of human diseases. many of the virulence factors are well studied but less is known of the metabolism of these fungi during the course of insect infection or saprobic growth. here, we assessed enzyme activity and gene expression in the central carbon metabolic pathway, including isocitrate dehydrogenase, aconitase, citrate synthase, malate ... | 2010 | 20929953 |
| in vivo passages of heterologous beauveria bassiana isolates improve conidial surface properties and pathogenicity to nilaparvata lugens (homoptera: delphacidae). | in entomopathogenic hyphomycetes, desired candidates against the brown planthopper, nilaparvata lugens (a sap-sucking rice pest in asia), are lacking. in this study, 21 beauveria bassiana isolates from heterologous host insects showed low pathogenicity to third-instar nymphs sprayed at the high concentration of ∼ 1000 conidia/mm(2), causing only 2-23% mortalities. of those, three isolates killed significantly more nymphs (up to 45-62%) after two in vivo passages but no more after further passage ... | 2010 | 20932842 |
| the rhizosphere-competent entomopathogen metarhizium anisopliae expresses a specific subset of genes in plant root exudate. | metarhizium anisopliae and beauveria bassiana are ubiquitous insect pathogens and possible plant symbionts, as some strains are endophytic or colonize the rhizosphere. we evaluated 11 strains of m. anisopliae and b. bassiana, and two soil saprophytes (the non-rhizospheric aspergillus niger and the rhizosphere-competent trichoderma harzianum) for their ability to germinate in bean root exudates (res). our results showed that some generalist strains of m. anisopliae were as good at germinating in ... | 2010 | 20947574 |
| physiological effects upon amblyomma americanum (acari: ixodidae) infected with beauveria bassiana (ascomycota: hypocreales). | unfed adult amblyomma americanum were exposed to the entomopathogenic fungus beauveria bassiana. ticks exposed to the fungus exhibited reduced survival and increased water loss as indicated by change in weight. treated ticks survived 7.2 ± 0.22 days (mean ± se) and controls survived 17.9 ± 0.73 days (p = 0.01; df = 57). at death, ticks exposed to the fungus had lost 25.2 ± 0.84% of their starting weight; control ticks had lost 14.1 ± 0.85% of their starting weight (p = 0.01; df = 96). water loss ... | 2010 | 20957415 |
| microbial transformations of aryltetralone and aryltetralin lignans by cunninghamella echinulata and beauveria bassiana. | microbiological transformation of the aryltetralone lignan (-)-8'-epi-aristoligone (1) with cunninghamella echinulata atcc 10028b afforded two known natural lignans, (-)-holostyligone (3) and (-)-arisantetralone (4). incubation of the aryltetralin lignan (-)-isogalbulin (2), obtained by chemical transformation of 1, with c. echinulata atcc 10028b afforded the known lignan aryltetralol (5) and seven new metabolites, (-)-8-hydroxyisogalbulin (6), (-)-7-methoxyisogalbulin (7), (-)-4'-o-demethyl-8-h ... | 2010 | 20961092 |
| correlation of the aphicidal activity of beauveria bassiana sfb-205 supernatant with enzymes. | the supernatant of beauveria bassiana sfb-205 reduced the population of cotton aphid, aphis gossypii glover, with a dosage-dependent manner, which allowed a quality control (qc) factor to be determined for the evaluation of the supernatant as the first step of a development. enzymes were assumed as possible qc factors based on 1) the comparable aphicidal activity of the supernatant protein pellet to the raw supernatant, 2) the supernatant-induced degradation of the insect cuticles, observed by t ... | 2010 | 20965068 |
| potential synergistic effect of melia azedarach fruit extract and beauveria bassiana in the control of rhipicephalus (boophilus) microplus (acari: ixodidae) in cattle infestations. | the use of a concentrate emulsion of melia azedarach green fruits and a suspension of the fungus beauveria bassiana was evaluated in the control of rhipicephalus microplus on artificially infested cattle. the evaluation was conducted following the protocol established by the brazilian agriculture ministry. five groups of 4 or 5 animals were allocated to one of the following treatments: emulsion concentrate of m. azedarach at 0.25% (t azed 0.25%), emulsion concentrate of m. azedarach at 0.5% (t a ... | 2010 | 21055878 |
| diversity of rhizosphere associated entomopathogenic fungi of perennial herbs, shrubs and coniferous trees. | understanding habitat selection of fungal entomopathogens is critical to improve the efficacy, persistence and cost of these fungi as microbial insecticides. this study sought to determine the prevalence of metarhizium and beauveria spp. isolated from the rhizosphere of strawberry, blueberry, grape and christmas tree crops in the willamette valley of oregon. entomopathogenic fungi were assigned to thirteen species based on molecular phylogenetic criteria. four species of metarhizium were isolate ... | 2010 | 21056569 |
| high-throughput insertion mutagenesis and functional screening in the entomopathogenic fungus beauveria bassiana. | the entomopathogenic fungus beauveria bassiana displays a broad insect host range and serves as a model for examining host-pathogen interactions. rapid construction and screening of random-insertion mutants of b. bassiana provides a powerful tool to dissect the molecular mechanisms of fungal virulence. liac/dmso treated b. bassiana blastospores were found to be highly competent to transformation using linear dna and a polyethylene glycol-based method. selection on cellophane-layered czapek-dox a ... | 2010 | 21059351 |
| dietary stress increases the susceptibility of tribolium castaneum to beauveria bassiana. | sanitation being an important component of chemical-free management of stored-products pests, the nutritional stress on insects that results from a clean environment may prove advantageous to the use of microbial controls. dietary stress by food deprivation or suboptimal diet increased susceptibility of the red flour beetle, tribolium castaneum (herbst), larvae to beauveria bassiana (balsamo) vuillemin. fungus-related mortality increased linearly with the number of days of food deprivation. rear ... | 2010 | 21061951 |
| characterization of a thioredoxin (bbtrx) from the entomopathogenic fungus beauveria bassiana and its expression in response to thermal stress. | a thioredoxin (bbtrx) was identified from the entomopathogenic fungus beauveria bassiana. the cloned nucleotide sequence consisted of a 423-bp open reading frame encoding a 141-amino-acid thioredoxin, a 1011-bp 5' region, and a 419-bp 3' region. the deduced protein sequence of bbtrx, including a common 95-amino-acid conserved domain and a unique 46-amino-acid carboxy terminal region, was similar (≤38% identity) to that of other thioredoxins and phylogenetically closest to that from neurospora cr ... | 2010 | 21076484 |
| carbon catabolite repressor gene bbcre1 influences carbon source uptake but does not have a big impact on virulence in beauveria bassiana. | a gene (bbcre1, genbank accession number ef108309) encoding a carbon catabolite repressor (crea) with two cys(2)his(2) zinc finger regions and a nuclear localization signal was cloned from the entomopathogenic fungus beauveria bassiana. overexpression and antisense strategies were used to investigate the biological functions of this gene. compared with the wild type, the conidial yield and colony growth of bbcre1-overexpression transformants were significantly decreased on the plates with xylose ... | 2010 | 21130770 |
| infection of the red palm weevil (rhynchophorus ferrugineus) by the entomopathogenic fungus beauveria bassiana: a sem study. | the red palm weevil (rhynchophorus ferrugineus) is a devastating pest of palms in the mediterranean, middle east, and eastern countries. no effective control measures are available. r. ferrugineus has been found naturally infected by the entomopathogenic fungus beauveria bassiana, but its infection process in this host is unknown. we have studied the infection of r. ferrugineus larvae and adults by b. bassiana using dry conidia and conidia suspensions using scanning electron microscopy (sem). in ... | 2010 | 20025054 |
| evaluation of quantitative pcr reference genes for gene expression studies in tribolium castaneum after fungal challenge. | to investigate gene expression in tribolium castaneum exposed to beauveria bassiana, reference genes for qpcr were evaluated. of these, beta-actin, alpha-tubulin, and rps6 were not stable. the most stable were ribosomal protein genes, rps3, rps18, and rpl13a. syntaxin1, syntaxin6, and e-cadherin may be appropriate for some experimental systems. | 2010 | 20026205 |
| identification and characterisation of human pathogenic filamentous fungi and susceptibility to thymus schimperi essential oil. | summary twenty-eight clinical fungal isolates were characterised by morphological (macro- and micro-features and growth response at 25, 30 and 37 degrees c) and molecular (nuclear rdna-internal transcriber spacer, calmodulin, cytochrome c oxidase 1 and the largest subunit of rna polymerase ii) analyses. the clinical fungal isolates were ascribed to the following taxa: penicillium chrysogenum, verticillium sp., aspergillus tubingensis, aspergillus minutus, beauveria bassiana and microsporum gypse ... | 2010 | 20633233 |
| microbial transformation of podocarpic acid and evaluation of transformation products for antioxidant activity. | podocarpic acid was metabolized by mucor ramannianus atcc 9628, and beauveria bassiana atcc 7159 to afford two new metabolites, 2 alpha-hydroxy podocarpic acid and 11-hydroxy podocarpic acid, along with the known metabolite 13-hydroxy podocarbic acid. the identity of these metabolites was verified using different spectral methods. the antioxidant activity of the metabolites was tested, and comparable results to those observed for ascorbic acid were obtained. | 2010 | 20072957 |
| factors affecting fungus-induced larval mortality in anopheles gambiae and anopheles stephensi. | entomopathogenic fungi have shown great potential for the control of adult malaria vectors. however, their ability to control aquatic stages of anopheline vectors remains largely unexplored. therefore, how larval characteristics (anopheles species, age and larval density), fungus (species and concentration) and environmental effects (exposure duration and food availability) influence larval mortality caused by fungus, was studied. | 2010 | 20085659 |
| a new manganese superoxide dismutase identified from beauveria bassiana enhances virulence and stress tolerance when overexpressed in the fungal pathogen. | a superoxide dismutase (sod) was characterized from beauveria bassiana, a fungal entomopathogen widely applied to insect control. this 209-aa enzyme (bbsod2) showed no more than 71% sequence identity to other fungal mn-sods, sharing all conserved residues with the mn-sod family and lacking a mitochondrial signal. the sod activity of purified bbsod2 was significantly elevated by mn(2+), suppressed by cu(2+) and zn(2+) but inhibited by fe(3+). overexpressing the enzyme in a bbsod2-absent b. bassia ... | 2010 | 20094711 |
| application of the beauveria bassiana strain for the enantioselective oxidation of the diethyl 1-hydroxy-1-phenylmethanephosphonate. | biotransformation of diethyl 1-hydroxy-1-phenylmethanephosphonate using fungi beauveria bassiana allowed resolving the racemic mixture of the substrate and due to the biocatalyst and reaction conditions modifications, leading to desired optical isomer. | 2010 | 21161226 |
| adulticidal and larvicidal activity of beauveria bassiana and metarhizium anisopliae against housefly, musca domestica (diptera: muscidae), in laboratory and simulated field bioassays. | the susceptibility of the adult and larval stage of housefly, musca domestica l. (diptera: muscidae), to two entomopathogenic fungi, metarhizium anisopliae (metsch.) sor. and beauveria bassiana (bals.) vuill., was evaluated under laboratory and simulated field bioassays. bioassays on adult houseflies were carried out at different conidial concentrations ranging from 10(3) to 10(9) conidia/ml in petri plate and minichamber assays. absolute mortality was observed within 4-5 days at all the concent ... | 2010 | 21161273 |
| preliminary study of genetic variation in hawaiian isolates of beauveria bassiana [hypocreales, cordycipitaceae]. | there have been no previous surveys documenting genetic diversity in beauveria bassiana (balsamo) vuillemin in hawaii. we used pcr primers and dna sequencing to genetically characterize 14 isolates of b. bassiana collected from insects in east hawaii island (the largest hawaiian island, known as the 'big island') and compared these with the 'gha' strain found in the commercial product botanigard®. twelve of the 14 hawaiian isolates were unique and the gha strain was not among those isolated from ... | 2010 | 21167170 |