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Beauveria bassiana

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https://www.readbyqxmd.com/read/28800848/cold-generation-of-smoke-flavour-by-the-first-phenolic-acid-decarboxylase-from-a-filamentous-ascomycete-isaria-farinosa
#1
Diana Linke, Stephanie J L Riemer, Silke Schimanski, Annabel Nieter, Ulrich Krings, Ralf G Berger
A decarboxylase (IfPAD) from the ascomycete Isaria farinosa converted ferulic acid to 4-vinylguaiacol (4-VG), a volatile which imparts the distinct "smoke flavor" of pyrolized wood. The activity was enhanced by adding (E)-ferulic acid to the culture medium and peaked with 3.6 U g(-1) mycelium (1 μmol 4-VG min(-1)). The coding sequence of 543 bp was translated into a 25 kDa protein with a homology of 91 % to putative phenolic acid decarboxylases of its teleomorph, Cordyceps militaris, and Beauveria bassiana, the anamorph of Cordyceps bassiana...
September 2017: Fungal Biology
https://www.readbyqxmd.com/read/28766034/the-hog1-like-mapk-mpk3-collaborates-with-hog1-in-response-to-heat-shock-and-functions-in-sustaining-the-biological-control-potential-of-a-fungal-insect-pathogen
#2
Jing Liu, Huan-Huan Sun, Sheng-Hua Ying, Ming-Guang Feng
The mitogen-activated protein kinase (MAPK) Mpk3/MpkC resembles the MAPK Hog1 but does not necessarily function in some filamentous fungi. Here, we compared functions of Mpk3 and Hog1 in Beauveria bassiana, a filamentous fungal insect pathogen, by multi-phenotypic analyses of their single/double deletion mutants. Growth defects of Δmpk3 were moderate on all 14 minimal media with different carbon or nitrogen sources and less severe than those of Δhog1 on most media tested. The double deletion mutant suffered significantly more severe growth defects than those observed in Δmpk3 and Δhog1, suggesting overlapping and collaborative roles of Mpk3 and Hog1 in uptake of six carbon and four nitrogen sources during normal growth...
August 2, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28762123/differential-immune-responses-of-monochamus-alternatus-against-symbiotic-and-entomopathogenic-fungi
#3
Wei Zhang, Jie Meng, Jing Ning, Peijun Qin, Jiao Zhou, Zhen Zou, Yanhong Wang, Hong Jiang, Faheem Ahmad, Lilin Zhao, Jianghua Sun
Monochamus alternatus, the main vector beetles of invasive pinewood nematode, has established a symbiotic relationship with a native ectotrophic fungal symbiont, Sporothrix sp. 1, in China. The immune response of M. alternatus to S. sp. 1 in the coexistence of beetles and fungi is, however, unknown. Here, we report that immune responses of M. alternatus pupae to infection caused by ectotrophic symbiotic fungus S. sp. 1 and entomopathogenic fungus Beauveria bassiana differ significantly. The S. sp. 1 did not kill the beetles while B...
July 28, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28761042/a-dsrna-virus-with-filamentous-viral-particles
#4
Hengxia Jia, Kaili Dong, Lingling Zhou, Guoping Wang, Ni Hong, Daohong Jiang, Wenxing Xu
Viruses with double-stranded RNA genomes form isometric particles or are capsidless. Here we report a double-stranded RNA virus, Colletotrichum camelliae filamentous virus 1 (CcFV-1) isolated from a fungal pathogen, that forms filamentous particles. CcFV-1 has eight genomic double-stranded RNAs, ranging from 990 to 2444 bp, encoding 10 putative open reading frames, of which open reading frame 1 encodes an RNA-dependent RNA polymerase and open reading frame 4 a capsid protein. When inoculated, the naked CcFV-1 double-stranded RNAs are infectious and induce the accumulation of the filamentous particles in vivo...
August 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28755300/in-vivo-gene-expression-profiling-of-the-entomopathogenic-fungus-beauveria-bassiana-elucidates-its-infection-stratagems-in-anopheles-mosquito
#5
Yiling Lai, Huan Chen, Ge Wei, Guandong Wang, Fang Li, Sibao Wang
The use of entomopathogenic fungi to control mosquitoes is a promising tool for reducing vector-borne disease transmission. To better understand infection stratagems of insect pathogenic fungi, we analyzed the global gene expression profiling of Beauveria bassiana at 36, 60, 84 and 108 h after topical infection of Anopheles stephensi adult mosquitoes using RNA sequencing (RNA-Seq). A total of 5,354 differentially expressed genes (DEGs) are identified over the course of fungal infection. When the fungus grows on the mosquito cuticle, up-regulated DEGs include adhesion-related genes involved in cuticle attachment, Pth11-like GPCRs hypothesized to be involved in host recognition, and extracellular enzymes involved in the degradation and penetration of the mosquito cuticle...
July 27, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28754033/the-influence-of-glycosylation-of-natural-and-synthetic-prenylated-flavonoids-on-binding-to-human-serum-albumin-and-inhibition-of-cyclooxygenases-cox-1-and-cox-2
#6
Tomasz Tronina, Paulina Strugała, Jarosław Popłoński, Aleksandra Włoch, Sandra Sordon, Agnieszka Bartmańska, Ewa Huszcza
The synthesis of different classes of prenylated aglycones (α,β-dihydroxanthohumol (2) and (Z)-6,4'-dihydroxy-4-methoxy-7-prenylaurone (3)) was performed in one step reactions from xanthohumol (1)-major prenylated chalcone naturally occurring in hops. Obtained flavonoids (2-3) and xanthohumol (1) were used as substrates for regioselective fungal glycosylation catalyzed by two Absidia species and Beauveria bassiana. As a result six glycosides (4-9) were formed, of which four glycosides (6-9) have not been published so far...
July 21, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28730600/transcriptomic-insights-into-the-alternative-splicing-mediated-adaptation-of-the-entomopathogenic-fungus-beauveria-bassiana-to-host-niches-autophagy-related-gene-8-as-an-example
#7
Wei-Xia Dong, Jin-Li Ding, Yang Gao, Yue-Jin Peng, Ming-Guang Feng, Sheng-Hua Ying
Alternative splicing (AS) regulates various biological processes in fungi by extending the cellular proteome. However, comprehensive studies investigating AS in entomopathogenic fungi are lacking. Based on transcriptome data obtained via dual RNA-seq, the first overview of AS events was developed for Beauveria bassiana growing in an insect hemocoel. The AS was demonstrated for 556 of 8,840 expressed genes, accounting for 5.4% of the total genes in B. bassiana. Intron retention was the most abundant type of AS, accounting for 87...
July 21, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28729649/effects-of-single-and-combined-applications-of-entomopathogenic-fungi-and-nematodes-against-rhynchophorus-ferrugineus-olivier
#8
Waqas Wakil, Muhammad Yasin, David Shapiro-Ilan
This study was carried out to investigate the insecticidal properties of Beauveria bassiana, Metarhizium anisopliae and Heterorhabditis bacteriophora for their virulence against different larval instars of Rhynchophorus ferrugineus (Olivier). Both fungi were either applied alone or in combination, with H. bacteriophora simultaneously or 1 and 2 weeks after fungal application; EPN were also applied alone. Moreover, assessment of host development, diet consumption, frass production and weight gain were observed at sub-lethal dose rates...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28721609/susceptibility-of-diaphorina-citri-hemiptera-liviidae-and-its-parasitoid-tamarixia-radiata-hymenoptera-eulophidae-to-entomopathogenic-fungi-under-laboratory-conditions
#9
K H Ibarra-Cortés, A W Guzmán-Franco, H González-Hernández, L D Ortega-Arenas, J A Villanueva-Jiménez, A Robles-Bermúdez
Diaphorina citri (Kuwayama) is a global pest of citrus that transmits the bacteria associated with the disease, Huanglongbing. Entomopathogenic fungi and the parasitoid Tamarixia radiata (Waterston) are important biological control agents of this pest and likely to interact in D. citri populations. As a basis for interaction studies, we determined the susceptibility of nymphs and adults of D. citri and adults of the parasitoid T. radiata to six fungal isolates from the species Beauveria bassiana s.l. (Bals...
July 18, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28713011/the-genomic-and-transcriptomic-analyses-of-serine-proteases-and-their-homologs-in-an-endoparasitoid-pteromalus-puparum
#10
Lei Yang, Zhe Lin, Qi Fang, Jiale Wang, Zhichao Yan, Zhen Zou, Qisheng Song, Gongyin Ye
In insects, serine proteases (SPs) and serine protease homologs (SPHs) constitute a large family of proteins involved in multiple physiological processes such as digestion, development, and immunity. Here we identified 145 SPs and 38 SPHs in the genome of an endoparasitoid, Pteromalus puparum. Gene duplication and tandem repeats were observed in this large SPs/SPHs family. We then analyzed the expression profiles of SP/SPH genes in response to different microbial infections (Gram-positive bacterium Micrococcus luteus, Gram-negative bacterium Escherichia coli, and entomopathogenic fungus Beauveria bassiana), as well as in different developmental stages and tissues...
July 13, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28708056/metarhizium-robertsii-produces-indole-3-acetic-acid-which-promotes-root-growth-in-arabidopsis-and-enhances-virulence-to-insects
#11
Xinggang Liao, Brian Lovett, Weiguo Fang, Raymond J St Leger
The plant root colonizing insect-pathogenic fungus Metarhizium robertsii has been shown to boost plant growth, but little is known about the responsible mechanisms. Here we show that M. robertsii promotes lateral root growth and root hair development of Arabidopsis seedlings in part through an auxin [indole-3-acetic acid (IAA)]-dependent mechanism. M. robertsii, or its auxin-containing culture filtrate promoted root proliferation, activated IAA-regulated gene expression and rescued the root hair defect of the IAA-deficient rhd6 Arabidopsis mutant...
July 15, 2017: Microbiology
https://www.readbyqxmd.com/read/28706459/beauvericin-a-cyclic-peptide-inhibits-inflammatory-responses-in-macrophages-by-inhibiting-the-nf-%C3%AE%C2%BAb-pathway
#12
Sulgi Yoo, Mi-Yeon Kim, Jae Youl Cho
Beauvericin (BEA), a cyclic hexadepsipeptide produced by the fungus Beauveria bassiana, is known to have anti-cancer, anti-inflammatory, and anti-microbial actions. However, how BEA suppresses macrophage-induced inflammatory responses has not been fully elucidated. In this study, we explored the anti-inflammatory properties of BEA and the underlying molecular mechanisms using lipopolysaccharide (LPS)-treated macrophage-like RAW264.7 cells. Levels of nitric oxide (NO), mRNA levels of transcription factors and the inflammatory genes inducible NO synthase (iNOS) and interleukin (IL)-1, and protein levels of activated intracellular signaling molecules were determined by Griess assay, semi-quantitative reverse transcriptase-polymerase chain reaction (RT-PCR), luciferase reporter gene assay, and immunoblotting analysis...
July 2017: Korean Journal of Physiology & Pharmacology
https://www.readbyqxmd.com/read/28705395/targeted-disruption-of-the-polyketide-synthase-gene-pks15-affects-virulence-against-insects-and-phagocytic-survival-in-the-fungus-beauveria-bassiana
#13
Wachiraporn Toopaang, Suranat Phonghanpot, Juntira Punya, Cheerapha Panyasiri, Kewarin Klamchao, Rudsamee Wasuwan, Chettida Srisuksam, Duangjai Sangsrakru, Chutima Sonthirod, Sithichoke Tangphatsornruang, Morakot Tanticharoen, Alongkorn Amnuaykanjanasin
The reducing clade III polyketide synthase genes, including pks15, are highly conserved among entomopathogenic fungi. To examine the function of pks15, we used targeted disruption to investigate the impact of Beauveria bassiana pks15 on insect pathogenesis. Southern analysis verified that the Δpks15 mutant was disrupted by a single integration of the transformation cassette at the pks15 locus. The Δpks15 mutant had a slight reduction in radial growth, and it produced fewer spores. Our insect bioassays indicated the Δpks15 mutant to be significantly reduced in virulence against beet armyworms compared to wild type (WT), which could be partially accounted for by its markedly decreased ability to survive phagocytosis...
August 2017: Fungal Biology
https://www.readbyqxmd.com/read/28677226/two-histidine-kinases-can-sense-different-stress-cues-for-activation-of-the-mapk-hog1-in-a-fungal-insect-pathogen
#14
Jing Liu, Sen-Miao Tong, Lei Qiu, Sheng-Hua Ying, Ming-Guang Feng
Filamentous fungi possess a large family of histidine kinases (HKs) classified to 11 distinct groups. Of those, only Group III (HK3) homologs in some fungi can sense osmotic, fungicidal and/or oxidative cues upstream of the signaling MAPK Hog1 cascade that usually governs two hallmark phenotypes, i.e., osmotolerance and dicarboximide/phenylpyrrole fungicide resistance. Here we examined functions of all eight HK groups with each possessing a single member in Beauveria bassiana. HK3 and HK8 (Group VIII) were evidently localized at hyphal cell periphery and had more functions in aerial conidiation and multiple stress responses than six other HKs...
July 5, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28667709/relationship-between-expression-level-of-hygromycin-b-resistant-gene-and-agrobacterium-tumefaciens-mediated-transformation-efficiency-in-beauveria-bassiana-jef-007
#15
Y S Nai, M R Lee, S Kim, S J Lee, J C Kim, Y T Yang, J S Kim
AIMS: Agrobacterium tumefaciens-mediated transformation (AtMT) is an effective method for generation of entomopathogenic Beauveria bassiana transformants. However, some strains grow on the selective medium containing hygromycin B (HygB), which reduces the selection efficiency of the putative transformants. In this work, a relationship between HygB resistance gene promoter and AtMT efficiency was investigated to improve the transformant selection. METHODS AND RESULTS: Ten B...
July 1, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28629883/laboratory-evaluation-of-the-effect-of-beauveria-bassiana-on-the-predatory-mite-phytoseiulus-persimilis-acari-phytoseiidae
#16
Mohammad Shaef Ullah, Un Taek Lim
Tetranychus urticae Koch (Acari: Tetranychidae), a major pest of many agricultural crops, is mainly controlled with chemical acaricides. However, predatory mites and entomopathogens have been proposed as alternative control agents. In this study, the effect of the BotaniGard(®) GHA strain of Beauveria bassiana on the survival, longevity, fecundity, and egg hatch rate of the predatory mite Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae) were studied under laboratory conditions. When B. bassiana was applied directly to P...
September 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28615876/microscopic-investigation-to-determine-the-effect-of-beauveria-bassiana-bals-vuill-and-cymbopogon-citratus-dc-stapf-treatment-on-different-life-stages-of-musca-domestica-l
#17
Sapna Mishra, Peeyush Kumar, Anushree Malik
Microscopic investigation was done to determine the effect of entomopathogenic fungi, Beauveria bassiana and essential oil of Cymbopogon citratus on different life stages of Musca domestica. Scanning electron microscopy investigation of fungal infected larvae showed sluggish movement, rigor, and failure of body to balance in water. Treated larvae also revealed varied level of cuticle shrinkage and extreme dehydration. Surface of B. bassiana infected pupae showed varied stage of mycelial growth, while the cadaver of adult fly was observed to have extensive fungal growth covering their entire body surface...
June 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28615623/proboscis-infection-route-of-beauveria-bassiana-triggers-early-death-of-anopheles-mosquito
#18
Minehiro Ishii, Hirotaka Kanuka, Athanase Badolo, N'Falé Sagnon, Wamdaogo M Guelbeogo, Masanori Koike, Daigo Aiuchi
Entomopathogenic fungi are known to control vector mosquito populations. Thus, understanding the infection dynamics of entomopathogenic fungi is crucial for the effective control of insect pests such as mosquitoes. We investigated the dynamics of Beauveria bassiana s.l. 60-2 infection of Anopheles stephensi by exposing the mosquito to fungus-impregnated filter paper through two infection routes and then comparing the mortality and extent of infection. Fungal development was observed after using this inoculation method with both the tarsus route and the proboscis route, but early mosquito death occurred only after infection through the proboscis route...
June 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28605881/scorpion-neurotoxin-aait-expressing-beauveria-bassiana-enhances-the-virulence-against-aedes-albopictus-mosquitoes
#19
Sheng-Qun Deng, Qun-Di Cai, Ming-Zhi Deng, Qiang Huang, Hong-Juan Peng
To improve the insecticidal efficacy of this entomopathogen Beauveria bassiana, the fungus was genetically modified to express an insect-specific scorpion neurotoxin AaIT. The virulence of the recombinant B. bassiana strain (Bb-AaIT) against Aedes albopictus adults (which occurs via penetration through the cuticle during spore germination or by conidia ingestion), and the larvae (by conidia ingestion) was measured with bioassays. The median lethal concentration (LC50) of Bb-AaIT against A. albopictus larvae was 313...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28557308/discovery-of-a-new-intravacuolar-protein-required-for-the-autophagy-development-and-virulence-of-beauveria-bassiana
#20
Zhen-Jian Chu, Huan-Huan Sun, Xiao-Guan Zhu, Sheng-Hua Ying, Ming-Guang Feng
High proportions of hypothetical proteins exist in genomic databases of fungi, including putative secretory proteins (PSPs) likely involved in fungal invasion and virulence. Here we characterize one of many PSPs revealed in the previous transcriptome of Beauveria bassiana (a fungal insect pathogen) infecting a global lepidopteran pest and name it vacuole-localized protein 4 (VLP4) because this small, domain-lacking protein (22.96 kDa) was specifically localized in the vacuoles of hyphal cells. Deletion of VLP4 resulted in repression of almost all genes acting in autophagy and central development pathways...
May 30, 2017: Environmental Microbiology
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