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Beauveria bassiana

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https://www.readbyqxmd.com/read/29327477/nitrogen-sources-affect-productivity-desiccation-tolerance-and-storage-stability-of-beauveria-bassiana-blastospores
#1
Gabriel M Mascarin, Nilce N Kobori, Mark A Jackson, Christopher A Dunlap, Ítalo Delalibera
AIMS: Nitrogen is a critical element in industrial fermentation media. This study investigated the influence of various nitrogen sources on blastospore production, desiccation tolerance, and storage stability using two strains of the cosmopolitan insect pathogenic fungus Beauveria bassiana. METHODS AND RESULTS: Complex organic sources of nitrogen such as soy flour, autolyzed yeast and cottonseed flour induced great numbers of blastospores after 2-3 days of fermentation, which also survived drying and remained viable (32-56% survival) after 9 months storage at 4 °C, although variations were found between strains...
January 11, 2018: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/29321565/characterization-of-novel-endo-%C3%AE-n-acetylglucosaminidases-from-sphingobacterium-species-beauveria-bassiana-and-cordyceps-militaris-that-specifically-hydrolyze-fucose-containing-oligosaccharides-and-human-igg
#2
Yibo Huang, Yujiro Higuchi, Takashi Kinoshita, Ai Mitani, Yasunari Eshima, Kaoru Takegawa
Endo-β-N-acetylglucosaminidase (ENGase) catalyzes hydrolysis of N-linked oligosaccharides. Although many ENGases have been characterized from various organisms, so far no fucose-containing oligosaccharides-specific ENGase has been identified in any organism. Here, we screened soil samples, using dansyl chloride (Dns)-labeled sialylglycan (Dns-SG) as a substrate, and discovered a strain that exhibits ENGase activity in the culture supernatant; this strain, named here as strain HMA12, was identified as a Sphingobacterium species by 16S ribosomal RNA gene analysis...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29305969/an-aldo-keto-reductase-bbakr1-is-involved-in-stress-response-and-detoxification-of-heavy-metal-chromium-but-not-required-for-virulence-in-the-insect-fungal-pathogen-beauveria-bassiana
#3
Huifang Wang, Zhangjiang He, Linli Luo, Xin Zhao, Zhuoyue Lu, Tingying Luo, Min Li, Yongjun Zhang
The aldo-keto reductases (AKRs) belong to the NADP-dependent oxidoreductase superfamily, which play important roles in various physiological functions in prokaryotic and eukaryotic organisms. However, many AKR superfamily members remain uncharacterized. Here, a downstream target gene of the HOG1 MAPK pathways coding for an aldo-keto reductase, named Bbakr1, was characterized in the insect fungal pathogen, Beauveria bassiana. Bbakr1 expression increased in response to osmotic and salt stressors, and oxidative and heavy metal (chromium) stress...
January 3, 2018: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/29302156/root-environment-is-a-key-determinant-of-fungal-entomopathogen-endophytism-following-seed-treatment-in-the-common-bean-phaseolus-vulgaris
#4
Soroush Parsa, Viviana Ortiz, María I Gómez-Jiménez, Matthew Kramer, Fernando E Vega
The common bean is the most important food legume in the world. We examined the potential of the fungal entomopathogens Beauveria bassiana and Metarhizium anisopliae applied as seed treatments for their endophytic establishment in the common bean. Endophytic colonization in sterile sand:peat averaged ca. 40% higher for fungus treatments and ca. six times higher for volunteer fungi (other fungal endophytes naturally occurring in our samples), relative to sterile vermiculite. Colonization by B. bassiana and M...
January 2018: Biological Control: Theory and Applications in Pest Management
https://www.readbyqxmd.com/read/29275430/the-histone-acetyltransferase-mst2-sustains-the-biological-control-potential-of-a-fungal-insect-pathogen-through-transcriptional-regulation
#5
Juan-Juan Wang, Qing Cai, Lei Qiu, Sheng-Hua Ying, Ming-Guang Feng
Histone lysine acetylation orchestrates transcriptional activity essential for diverse cellular events across organisms, but it remains poorly understood how an acetylated lysine affects cellular functions in filamentous fungal pathogens. Here, we show the functions of a histone acetyltransferase that is phylogenetically close to Mst2 in fission yeast and specifically acetylates histone H3K14 in Beauveria bassiana, a fungal insect pathogen widely applied in arthropod pest management. Deletion of mst2 in B. bassiana resulted in moderate growth defects on rich and minimal media, delayed conidiation, and drastic reduction (75%) in conidiation capacity under normal culture conditions...
December 23, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29273219/cryptic-changes-in-immune-response-and-fitness-in-tribolium-castaneum-as-a-consequence-of-coevolution-with-beauveria-bassiana
#6
Charlotte Rafaluk-Mohr, Sophia Wagner, Gerrit Joop
Immunity is a key trait in host defence against parasites and is thus likely to be under selection during host-parasite coevolution. Broadly, the immune system consists of several lines of defence including physiological innate immunity, physical barriers such as the cuticle, avoidance behaviours and in some cases antimicrobial secretions. The defence conferring the highest fitness benefit may be situation specific and depend on the taxon and infection route of the parasite. We carried out a host-parasite coevolution experiment between the red flour beetle T...
December 19, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29258843/comparative-transcriptome-and-gene-co-expression-network-analysis-reveal-genes-and-signaling-pathways-adaptively-responsive-to-varied-adverse-stresses-in-the-insect-fungal-pathogen-beauveria-bassiana
#7
Zhangjiang He, Xin Zhao, Zhuoyue Lu, Huifang Wang, Pengfei Liu, Fanqin Zeng, Yongjun Zhang
Sensing, responding, and adapting to the surrounding environment are crucial for all living organisms to survive, proliferate, and differentiate in their biological niches. Beauveria bassiana is an economically important insect-pathogenic fungus which is widely used as a biocontrol agent to control a variety of insect pests. The fungal pathogen unavoidably encounters a variety of adverse environmental stresses and defense response from the host insects during application of the fungal agents. However, few are known about the transcription response of the fungus to respond or adapt varied adverse stresses...
December 16, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29250446/a-laboratory-assessment-of-two-local-strains-of-the-beauveria-bassiana-bals-vuill-against-the-tetranychus-urticae-acari-tetranychidae-and-their-potential-as-a-mycopesticide
#8
Serkan Ortucu, Omer Faruk Algur
This study was conducted to assess highly pathogenic Beauveria bassiana isolates to be used in biocontrol and to determine their potentials as mycopesticide. For this purpose, two B. bassiana isolates, which were locally isolated from T. urticae, were chosen. Firstly, three suspensions were investigated at the degree of humidity of 65 ± 5% and 100% RH. Secondly, these strains were selected according to their tendency to mass production, tolerance to UV radiation, and capability of producing spore at the different temperatures...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29226976/analysis-of-variation-in-virulence-of-beauveria-bassiana-against-insect-pests-of-pigeonpea-using-qpcr
#9
Govindasamy Senthilraja, Theerthagiri Anand, Subbarayalu Mohankumar, Thiruvengadam Raguchander, Ramasamy Samiyappan
Beauveria bassiana is a broad spectrum microbial bioagent used for the control of agriculturally important insect pests. However, in our experiments, two virulent isolates of B. bassiana (B2 and B10) showed specific preference toward Maruca vitrata and Helicoverpa armigera of pigeonpea. To better understand this feature, we developed a qPCR assay to quantify the chitinase (virulence factor) of B. bassiana during the infection process. Isolates of B. bassiana were grown on insect cuticle amended medium and minimal medium (without insect cuticle) to assess the induction of chitinase...
December 11, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29214339/genes-involved-in-beauveria-bassiana-infection-to-galleria-mellonella
#10
Anhui Chen, Yulong Wang, Ying Shao, Qiumei Zhou, Shanglong Chen, Yonghua Wu, Hongwei Chen, Enqi Liu
The ascomycete fungus Beauveria bassiana is a natural pathogen of hundreds of insect species and is commercially produced as an environmentally friendly mycoinsecticide. Many genes involved in fungal insecticide infection have been identified but few have been further explored. In this study, we constructed three transcriptomes of B. bassiana at 24, 48 and 72 h post infection of insect pests (BbI) or control (BbC). There were 3148, 3613 and 4922 genes differentially expressed at 24, 48 and 72 h post BbI/BbC infection, respectively...
December 6, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/29193264/role-of-antheraea-pernyi-serpin-12-in-prophenoloxidase-activation-and-immune-responses
#11
Saima Kausar, Muhammad Nadeem Abbas, Cen Qian, Baojian Zhu, Jin Gao, Yu Sun, Lei Wang, Guoqing Wei, Chaoliang Liu
Serine protease inhibitors play a key role in the immune system of invertebrates by controlling proteolytic cascades. Besides its importance, the knowledge on immune functions of serpins in most of insects is fragmentary. In the present study, we identified serpin-12 from Antheraea pernyi encoding a predicted 402 amino acid residue protein (Apserpin-12). We expressed the recombinant protein in Escherichia coli and the purified protein was used for the synthesis of rabbit anti-Apserpin-12 polyclonal antibodies and functional studies...
November 29, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29193252/immune-function-of-a-rab-related-protein-by-modulating-the-jak-stat-signaling-pathway-in-the-silkworm-bombyx-mori
#12
Chen Chen, Salah Eldein, Xiaosan Zhou, Yu Sun, Jin Gao, Yuxuan Sun, Chaoliang Liu, Lei Wang
The Rab-family GTPases mainly regulate intracellular vesicle transport, and play important roles in the innate immune response in invertebrates. However, the function and signal transduction of Rab proteins in immune reactions remain unclear in silkworms. In this study, we analyzed a Rab-related protein of silkworm Bombyx mori (BmRABRP) by raising antibodies against its bacterially expressed recombinant form. Tissue distribution analysis showed that BmRABRP mRNA and protein were high expressed in the Malpighian tubule and fat body, respectively...
November 30, 2017: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29175530/increased-tolerance-of-beauveria-bassiana-and-metarhizium-anisopliae-conidia-to-high-temperature-provided-by-oil-based-formulations
#13
Daian Guilherme Pinto De Oliveira, Rogerio Biaggioni Lopes, Janayne Maria Rezende, Italo Delalibera
The influence of the temperature of aqueous conidial sprays on conidial viability and virulence against Diatraea saccharalis was evaluated for pure conidia, rice + fungus (technical concentrates) and oil-based formulations of Beauveria bassiana s.s. and Metarhizium anisopliae s.s. under laboratory conditions. The fungal preparations were suspended in water and maintained at 26°C, 36°C and 46°C for one, four and six hours. Conidial viability was determined by plating aliquots of each suspension onto PDA medium followed by incubation for 20-22 h and observing for viable conidia (germ tubes longer than diameter of conidia)...
November 22, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29163517/prophenoloxidase-mediated-ex-vivo-immunity-to-delay-fungal-infection-after-insect-ecdysis
#14
Jie Zhang, Wuren Huang, Chuanfei Yuan, Yuzhen Lu, Bing Yang, Cheng-Yuan Wang, Peng Zhang, Leonard Dobens, Zhen Zou, Chengshu Wang, Erjun Ling
Skin immunity protects animals from airborne pathogen infection. Unlike mammals, arthropods, including insects, undergo periodic ecdysis to grow and develop. Newly molted insects emerge with unsclerotized thin cuticles but successfully escape pathogenic infections during the post-molt period. Here we show that prophenoloxidases (PPOs) in molting fluids remain bioactive on the integument and impede fungal infection after ecdysis. We found that the purified plasma PPOs or recombinant PPOs could effectively bind to fungal spores (conidia) by targeting the cell wall components chitin and β-1,3-glucan...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29154952/in-vitro-mechanisms-of-beauvericin-toxicity-a-review
#15
REVIEW
Beatriz Mallebrera, Alessandra Prosperini, Guillermina Font, Maria-Jose Ruiz
Beauvericin (BEA) is a mycotoxin produced by many species of fungus Fusarium and by Beauveria bassiana; BEA is a natural contaminant of cereals and cereals based products and possesses a wide variety of biological properties. The mechanism of action seems to be related to its ionophoric activity, that increases ion permeability in biological membranes. As a consequence, BEA causes cytotoxicity in several cell lines and is capable to produce oxidative stress at molecular level. Moreover, BEA is genotoxic (produces DNA fragmentation, chromosomal aberrations and micronucleus) and causes apoptosis with the involvement of mitochondrial pathway...
November 15, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29138624/entomopathogenic-fungi-as-dual-control-agents-against-both-the-pest-myzus-persicae-and-phytopathogen-botrytis-cinerea
#16
Hwi-Geon Yun, Dong-Jun Kim, Won-Seok Gwak, Tae-Young Shin, Soo-Dong Woo
The green peach aphid (Myzus persicae), a plant pest, and gray mold disease, caused by Botrytis cinerea, affect vegetables and fruit crops all over the world. To control this aphid and mold, farmers typically rely on the use of chemical insecticides or fungicides. However, intensive use of these chemicals over many years has led to the development of resistance. To overcome this problem, there is a need to develop alternative control methods to suppress populations of this plant pest and pathogen. Recently, potential roles have been demonstrated for entomopathogenic fungi in endophytism, phytopathogen antagonism, plant growth promotion, and rhizosphere colonization...
September 2017: Mycobiology
https://www.readbyqxmd.com/read/29135952/integrated-pest-management-of-coffee-berry-borer-in-hawaii-and-puerto-rico-current-status-and-prospects
#17
Luis F Aristizábal, Melissa Johnson, Suzanne Shriner, Robert Hollingsworth, Nicholas C Manoukis, Roxana Myers, Paul Bayman, Steven P Arthurs
The coffee berry borer (CBB), Hypothenemus hampei, is the most significant insect pest of coffee worldwide. Since CBB was detected in Puerto Rico in 2007 and Hawaii in 2010, coffee growers from these islands are facing increased costs, reduced coffee quality, and increased pest management challenges. Here, we outline the CBB situation, and summarize the findings of growers, researchers, and extension professionals working with CBB in Hawaii. Recommendations for the Integrated Pest Management (IPM) program for CBB in Hawaiian Islands and Puerto Rico include: (1) establish a CBB monitoring program, (2) synchronize applications of insecticides with peak flight activity of CBB especially during the early coffee season, (3) conduct efficient strip-picking as soon as possible after harvest and perform pre-harvest sanitation picks in CBB hotspots if needed, (4) establish protocols to prevent the escape of CBB from processing areas and when transporting berries during harvest, and (5) stump prune by blocks...
November 14, 2017: Insects
https://www.readbyqxmd.com/read/29102780/involvement-of-laccase2-and-yellow-e-genes-in-antifungal-host-defense-of-the-model-beetle-tribolium-castaneum
#18
Yuuki Hayakawa, Mitsuki Sawada, Masaki Seki, Patchara Sirasoonthorn, Shotaro Shiga, Katsumi Kamiya, Chieka Minakuchi, Ken Miura
We previously reported that the moderate knockdown of chitin synthase 1 gene of the model beetle Tribolium castaneum impairs the host defense against entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae, which infect host insects via the direct penetration of cuticular integuments (Hayakawa et al, 2017). In this study, we focused on the antifungal roles of laccase2 (Lac2) as well as yellow-e (Y-e) genes, both of which are shown to be important to the establishment of stable cuticular structures in this beetle species...
November 1, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29079530/identification-and-function-of-camp-response-element-binding-protein-in-oak-silkworm-antheraea-pernyi
#19
Jin Gao, Yu Sun, Yuxuan Sun, Chen Chen, Saima Kausar, Jiwu Tian, Baojian Zhu, Chaoliang Liu
Cyclic AMP response element binding (CREB) proteins participate in the regulation of many biological processes. However, little is known about their role in immune regulation in the Oak silkworm (Antheraea pernyi). In this study, a CREB gene was identified in A. pernyi and its role in immune regulation was investigated. ApCREB shares conserved signature motifs with other CREB proteins, and includes a typical leucine zipper domain, specific DNA-binding site, nuclear localisation signal (NLS) and cAMP-dependent protein kinase phosphorylation site...
October 24, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/29079330/compatibility-of-chemical-insecticides-and-entomopathogenic-fungi-for-control-of-soybean-defoliating-pest-rachiplusia-nu
#20
Sebastian A Pelizza, Santiago Schalamuk, María R Simón, Sebastian A Stenglein, Suani G Pacheco-Marino, Ana C Scorsetti
Rachiplusia nu (Guenée) (Lepidoptera: Noctuidae) is one of the major lepidopteran pests defoliating soybeans (Glycine max Merrill) in Argentina. The combined use of chemical insecticides and entomopathogenic fungi is a promising pest-control option to minimize adverse chemical effects. In this work, we evaluated the interactions between five insecticides-two being considered biorational-and five fungal entomopathogenic strains under laboratory conditions in order to determine the possible usefulness of combinations of these agents against R...
October 24, 2017: Revista Argentina de Microbiología
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