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Ricietto APS, Gonçalves KCB, Appel RJC, Sosa-Gómez DR, Vilas-Bôas GT, Vilas-Boas LA. Complete genome sequence of Bacillus thuringiensis BR145, a strain with insecticidal activity against Lepidoptera pests. Genet Mol Biol 2022; 45:e20210289. [PMID: 35298585 PMCID: PMC8929511 DOI: 10.1590/1678-4685-gmb-2021-0289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 02/03/2022] [Indexed: 11/22/2022] Open
Abstract
Bacillus thuringiensis BR145 isolated from a soybean field in Southern Brazil showed toxicity against two important insect pests from soybean crop, Helicoverpa armigera, and Chrysodeixis includens, with LC50 0.294 µg.cm-2 and 0.277 µg.cm-2, respectively. We analyzed the genome of this strain through sequences obtained by Next Generation DNA Sequencing and de novo assembly. The analysis of the genome revealed insecticidal genes cry1Aa, cry1Ab, cry1Ac, cry1Ia, cry2Ab, cyt1, and vip3Aa, suggesting the use of this strain in new strategies of biological control.
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Affiliation(s)
| | | | | | - Daniel Ricardo Sosa-Gómez
- Empresa Brasileira de Pesquisa Agropecuária (Embrapa Soja), Centro Nacional de Pesquisa de Soja, Londrina, PR, Brazil
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Pezenti LF, Sosa-Gómez DR, de Souza RF, Vilas-Boas LA, Gonçalves KB, da Silva CRM, Vilas-Bôas GT, Baranoski A, Mantovani MS, da Rosa R. Transcriptional profiling analysis of susceptible and resistant strains of Anticarsia gemmatalis and their response to Bacillus thuringiensis. Genomics 2021; 113:2264-2275. [PMID: 34022342 DOI: 10.1016/j.ygeno.2021.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 03/09/2021] [Accepted: 05/17/2021] [Indexed: 02/06/2023]
Abstract
Anticarsia gemmatalis is one of the main defoliators of soybean in Brazil. Bacillus thuringiensis (Bt) transgenic crops are used for their management. In this paper we used RNA-seq to explore the response of A. gemmatalis to Bt HD73, as well as to detect transcriptional differences after Bt infection between resistant and susceptible strains. A total of 3853 and 6224 differentially expressed genes (DGEs) were identified in susceptible and resistant larvae after Bt exposure, respectively. We identified 2143 DEGs between susceptible and resistant larvae and 1991 between susceptible and resistant larvae Bt exposed. Immunity-related genes, Bt toxins receptors, proteases, genes involved in metabolic processes, transporters, cuticle proteins and mobile elements have been identified. qRT-PCR data demonstrated upregulation of five genes in susceptible strain after Bt exposure. These results provide insights to understand the molecular and cellular mechanisms of response to Bt that could be used in strategies to control agricultural pests.
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Affiliation(s)
- Larissa Forim Pezenti
- Laboratório de Citogenética Animal, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil; Laboratório de Bioinformática, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Daniel Ricardo Sosa-Gómez
- Empresa Brasileira de Pesquisa Agropecuária/Centro Nacional de Pesquisa de Soja (Embrapa Soja), Londrina, Paraná, Brazil.
| | - Rogério Fernandes de Souza
- Laboratório de Bioinformática, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Laurival Antônio Vilas-Boas
- Laboratório de Bioinformática, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil; Laboratório de Genética e Taxonomia de Bactérias, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Kátia Brumatti Gonçalves
- Laboratório de Bioinformática, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | | | - Gislayne Trindade Vilas-Bôas
- Laboratório de Genética e Taxonomia de Bactérias, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Adrivanio Baranoski
- Laboratório de Genética Toxicológica, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil
| | - Mário Sérgio Mantovani
- Laboratório de Genética Toxicológica, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
| | - Renata da Rosa
- Laboratório de Citogenética Animal, Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil.
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Zorzetti J, Ricietto APS, Fazion FAP, Meneguim AM, Neves PMOJ, Vilas-Boas LA, Rodrigues RB, Vilas-Bôas GT. Selection and Characterization of Bacillus thuringiensis (Berliner) (Eubacteriales: Bacillaceae) Strains for Ecdytolopha aurantiana (Lima) (Lepidoptera: Tortricidae) Control. Neotrop Entomol 2017; 46:86-92. [PMID: 27406593 DOI: 10.1007/s13744-016-0424-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 06/24/2016] [Indexed: 06/06/2023]
Abstract
The citrus fruit borer, Ecdytolopha aurantiana (Lima, 1927) (Lepidoptera: Tortricidae), is responsible for major losses to the citrus industry because it causes rot and drop of fruits. The current study aimed to select and characterize Bacillus thuringiensis (Berliner, 1911) strains toxic to E. aurantiana. For this purpose, 47 B. thuringiensis strains were evaluated in selective bioassays using first instar larvae of E. aurantiana. The lethal concentration (LC50) of the most toxic strains was estimated, and the strains were characterized by morphological, biochemical, and molecular methods. Of the 47 strains tested, 10 caused mortality above 85% and showed mean lethal concentrations between 1.05E+7 and 1.54E+8 spores mL-1. The lowest LC50 values were obtained for the HD-1 standard strain and the BR145, BR83, BR52, and BR09 strains. The protein profile showed the presence of Cry proteins of 60, 65, 70, 80, and 130 kDa. The molecular characterization showed the presence of cry1, cry2, cry3, and cry11 genes. The morphological analysis identified three different crystalline inclusions: bipyramidal, round, and cuboidal. The cry1 and cry2 genes were the most frequent among the B. thuringiensis strains evaluated and encode Cry proteins toxic to insects of the order Lepidoptera, which agree with the toxicity results obtained by the selective bioassays against E. aurantiana. The results showed four different B. thuringiensis strains toxic to E. aurantiana at the same level as the HD-1 standard strain, and these strains have biotechnological potential for E. aurantiana control through the production of transgenic plants or the formulation of biopesticides.
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Affiliation(s)
- J Zorzetti
- Centro de Ciências Agrárias, Departamento de Agronomia, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil.
| | - A P S Ricietto
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - F A P Fazion
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - A M Meneguim
- Instituto Agronômico do Paraná, Londrina, PR, Brazil
| | - P M O J Neves
- Centro de Ciências Agrárias, Departamento de Agronomia, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - L A Vilas-Boas
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
| | - R B Rodrigues
- Instituto Agronômico do Paraná, Londrina, PR, Brazil
| | - G T Vilas-Bôas
- Centro de Ciências Biológicas, Departamento de Biologia Molecular, Univ Estadual de Londrina, Rodovia Celso Garcia Cid, Km 445, CEP 86047-902, Londrina, PR, Brazil
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Ricietto APS, Gomis-Cebolla J, Vilas-Bôas GT, Ferré J. Susceptibility of Grapholita molesta (Busck, 1916) to formulations of Bacillus thuringiensis, individual toxins and their mixtures. J Invertebr Pathol 2016; 141:1-5. [PMID: 27686262 DOI: 10.1016/j.jip.2016.09.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 09/14/2016] [Accepted: 09/23/2016] [Indexed: 11/28/2022]
Abstract
The Oriental fruit moth, Grapholita molesta (Lepidoptera: Tortricidae), is a major pest of fruit trees worldwide, such as peach and apple. Bacillus thuringiensis has been shown to be an efficient alternative to synthetic insecticides in the control of many agricultural pests. The objective of this study was to evaluate the effectiveness of B. thuringiensis individual toxins and their mixtures for the control of G. molesta. Bioassays were performed with Cry1Aa, Cry1Ac, Cry1Ca, Vip3Aa, Vip3Af and Vip3Ca, as well as with the commercial products DiPel® and XenTari®. The most active proteins were Vip3Aa and Cry1Aa, with LC50 values of 1.8 and 7.5ng/cm2, respectively. Vip3Ca was nontoxic to this insect species. Among the commercial products, DiPel® was slightly, but significantly, more toxic than XenTari®, with LC50 values of 13 and 33ng commercial product/cm2, respectively. Since Vip3A and Cry1 proteins are expressed together in some insect-resistant crops, we evaluated possible synergistic or antagonistic interactions among them. The results showed moderate to high antagonism in the combinations of Vip3Aa with Cry1Aa and Cry1Ca.
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Affiliation(s)
- Ana Paula Scaramal Ricietto
- Departamento de Biologia Geral, Universidade Estadual de Londrina, Londrina, Paraná, Brazil; ERI de Biotecnología y Biomedicina (BIOTECMED), Department of Genetics, Universitat de València, 46100 Burjassot, Spain
| | - Joaquín Gomis-Cebolla
- ERI de Biotecnología y Biomedicina (BIOTECMED), Department of Genetics, Universitat de València, 46100 Burjassot, Spain
| | | | - Juan Ferré
- ERI de Biotecnología y Biomedicina (BIOTECMED), Department of Genetics, Universitat de València, 46100 Burjassot, Spain.
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Costa GN, Marcelino-Guimarães FC, Vilas-Bôas GT, Matsuo T, Miglioranza LHS. Potential fate of ingested Lactobacillus plantarum and its occurrence in human feces. Appl Environ Microbiol 2014; 80:1013-9. [PMID: 24271176 PMCID: PMC3911214 DOI: 10.1128/aem.02588-13] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 11/19/2013] [Indexed: 12/26/2022] Open
Abstract
Lactobacillus plantarum has been used in human clinical trials to promote beneficial effects in the immune system, to alleviate intestinal disorders, and to reduce the risk of cardiovascular disease. It is also involved in many fermentation processes in the food industry. However, information on the fate of ingested L. plantarum is limited. In this study, 61 subjects received daily doses of fermented milk containing 2 × 10(11) cells of L. plantarum Lp115 for different periods of time. The target microorganism was monitored in the fecal microbiota via quantitative PCR (qPCR). L. plantarum was detected and quantified in all of the subjects during the ingestion periods. The differences between the L. plantarum levels at time zero and during all the different ingestion periods were statistically significant (P = 0.001). However, at 15 and 45 days after discontinuing supplementation, the number of lactobacilli was reduced to the baseline level (those at time zero). A longer period with L. plantarum in the diet did not result in increased levels of this bacterium in the stool, based on postconsumption evaluations (P = 0.001). The qPCR method was specific and sensitive for L. plantarum quantification in such a complex microbial environment as the gastrointestinal tract.
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Affiliation(s)
- Giselle Nobre Costa
- Departamento de Ciência e Tecnologia de Alimentos, Universidade Estadual de Londrina, Londrina, PR, Brazil
- Mestrado em Ciência e Tecnologia do Leite e Derivados, Universidade Norte do Paraná, Londrina, PR, Brazil
| | | | | | - Tiemi Matsuo
- Departamento de Matemática e Estatística Aplicada, Universidade Estadual de Londrina, Londrina, PR, Brazil
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Paião FG, Arisitides LGA, Murate LS, Vilas-Bôas GT, Vilas-Boas LA, Shimokomaki M. Detection of Salmonella spp, Salmonella Enteritidis and Typhimurium in naturally infected broiler chickens by a multiplex PCR-based assay. Braz J Microbiol 2013; 44:37-41. [PMID: 24159281 PMCID: PMC3804175 DOI: 10.1590/s1517-83822013005000002] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Accepted: 09/13/2012] [Indexed: 11/24/2022] Open
Abstract
The presence of Salmonella in the intestinal tract, on the chickens skin and among their feathers, may cause carcasses contamination during slaughtering and processing and possibly it is responsible by the introduction of this microorganism in the slaughterhouses. A rapid method to identify and monitor Salmonella and their sorovars in farm is becoming necessary. A pre-enriched multiplex polymerase chain reaction (m-PCR) assay employing specific primers was developed and used to detect Salmonella at the genus level and to identify the Salmonella enterica serovar Enteritidis (S. Enteritidis) and Salmonella enterica serovar Typhimurium (S. Typhimurium) in broiler chicken swab samples. The method was validated by testing DNA extract from 90 fresh culture cloacal swab samples from poultry chicken cultured in phosphate buffer peptone water at 37 °C for 18 h. The final results showed the presence of Salmonella spp. in 25% of samples, S. Enteritidis was present in 12% of the Salmonella-positive samples and S. Typhimurium in 3% of the samples. The m-PCR assay developed in this study is a specific and rapid alternative method for the identification of Salmonella spp. and allowed the observation of specific serovar contamination in the field conditions within the locations where these chickens are typically raised.
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Affiliation(s)
- F G Paião
- Universidade Estadual de Londrina, Centro de Ciências Agrárias, Departamento de Ciência e Tecnologia de Alimentos, Londrina, PR, Brazil
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Ricieto APS, Fazion FAP, Carvalho Filho CD, Vilas-Boas LA, Vilas-Bôas GT. Effect of vegetation on the presence and genetic diversity of Bacillus thuringiensis in soil. Can J Microbiol 2013; 59:28-33. [PMID: 23391226 DOI: 10.1139/cjm-2012-0462] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bacillus thuringiensis isolates were obtained from soil samples collected at different sites located in the same region but with different vegetation. The sites showed different frequencies of B. thuringiensis, depending on the type of vegetation. Strains of B. thuringiensis were found to be less common in samples of riparian forest soil than in soil of other types of vegetation. The rate of occurrence of B. thuringiensis in the samples also varied according to the vegetation. These results show that whenever this bacterium was found, it showed a high rate of occurrence, indicating that this species could be better adapted to using soil as a reservoir than other Bacillus species. The presence of cry genes was analyzed by polymerase chain reaction, and genes that exhibited activity against Diptera species were the most commonly found. The isolates obtained were characterized by random amplified polymorphic DNA, and 50% were clustered into clonal groups. These results demonstrated the possible occurrence of a high number of genetically similar strains when samples are collected from the same region, even if they are from locations with different vegetation.
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Affiliation(s)
- Ana Paula Scaramal Ricieto
- Departamento de Biologia Geral, Universidade Estadual de Londrina, CP6001, 86051-990, Londrina/PR, Brazil
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Abstract
Three species of the Bacillus cereus group (Bacillus cereus, Bacillus anthracis , and Bacillus thuringiensis ) have a marked impact on human activity. Bacillus cereus and B. anthracis are important pathogens of mammals, including humans, and B. thuringiensis is extensively used in the biological control of insects. The microbiological, biochemical, and genetic characteristics of these three species are reviewed, together with a discussion of several genomic studies conducted on strains of B. cereus group. Using bacterial systematic concepts, we speculate that to understand the taxonomic relationship within this group of bacteria, special attention should be devoted also to the ecology and the population genetics of these species.
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Affiliation(s)
- G T Vilas-Bôas
- Departamento de Biologia Geral, CCB, UEL, CP 6001, Londrina/PR, 86051-990, Brazil.
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Abstract
Two hundred and eighteen Bacillus thuringiensis isolates from Brazil were characterized by the presence of crystal protein genes by PCR with primers specific to different cry and cyt genes. Among these isolates, 95 were selected according to their geographic origin for genetic characterization with the 16S rRNA gene, RAPD, and plasmid profile. Isolates containing cry1 genes were the most abundant (48%) followed by the cry11 and cyt (7%) and cry8 genes (2%). Finally, 40.3% of the isolates did not produce any PCR product. The plasmid profile and RAPD analysis showed a remarkable diversity among the isolates of B. thuringiensis not observed in the 16S rRNA gene. These results suggest that the genetic diversity of B. thuringiensis species results from the influence of different ecological factors and spatial separation between strains generated by the conquest of different habitats.
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Affiliation(s)
- Gislayne Trindade Vilas-Bôas
- Departamento de Biologia Aplicada à Agropecuária, FCAV/UNESP, Via de Acesso Prof. Paulo D. Castellane, Jaboticabal/SP, 14884-900, Brazil.
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