Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum

Autores
Barra, Paula Sabina; Etcheverry, Miriam Graciela; Nesci, Andrea Verónica
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Entomopathogenic fungi can regulate insect populations. They have extracellular enzymes that degrade cuticle components, mainly hydrocarbons, used as an energy source. The increase in insecticidal activity of fungi in a medium supplemented with cuticular hydrocarbons was assayed and the hydrolytic enzyme profiles of two strains of Purpureocillium lilacinum were evaluated. A spore suspension of P. lilacinum was inoculated in Petri plates with different values (0.99–0.97–0.95) of water activity (Aw) using the substrates gelatin, starch and tween-20. Growth rate on the different substrates and the enzymatic activity index for proteases, amylases and lipases at different incubation times, pH and Aw, was evaluated. Moreover, the insecticidal efficiency of strains grown in media supplemented with n-hexadecane and n-octacosane was analyzed. LT50 was calculated against adults of Tribolium confusum and showed that mortality increased about 15% when the strains grew in amended culture medium. High amylolytic activity was detected, but proteases were the main enzymes produced. Optimal protease production was observed in a range of acid and alkaline pH and lower Aw. The greatest growth rate was obtained in presence of gelatin. Lipase and amylase production was detected in small amounts. Fungal growth in media with hydrocarbon mixtures increased the pathogenicity of the two strains of P. lilacinum, with the strain JQ926223 being more virulent. The information obtained is important for achieving both an increase in insecticidal capacity and an understanding of physiological adaptation of the fungus.
Fil: Barra, Paula Sabina. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; Argentina
Fil: Etcheverry, Miriam Graciela. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; Argentina
Fil: Nesci, Andrea Verónica. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; Argentina
Materia
Entomopathogenic Fungi
Enzymes
Insects
Virulence
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/62589
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/62589
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium ConfusumBarra, Paula SabinaEtcheverry, Miriam GracielaNesci, Andrea VerónicaEntomopathogenic FungiEnzymesInsectsVirulencehttps://purl.org/becyt/ford/4.4https://purl.org/becyt/ford/4Entomopathogenic fungi can regulate insect populations. They have extracellular enzymes that degrade cuticle components, mainly hydrocarbons, used as an energy source. The increase in insecticidal activity of fungi in a medium supplemented with cuticular hydrocarbons was assayed and the hydrolytic enzyme profiles of two strains of Purpureocillium lilacinum were evaluated. A spore suspension of P. lilacinum was inoculated in Petri plates with different values (0.99–0.97–0.95) of water activity (Aw) using the substrates gelatin, starch and tween-20. Growth rate on the different substrates and the enzymatic activity index for proteases, amylases and lipases at different incubation times, pH and Aw, was evaluated. Moreover, the insecticidal efficiency of strains grown in media supplemented with n-hexadecane and n-octacosane was analyzed. LT50 was calculated against adults of Tribolium confusum and showed that mortality increased about 15% when the strains grew in amended culture medium. High amylolytic activity was detected, but proteases were the main enzymes produced. Optimal protease production was observed in a range of acid and alkaline pH and lower Aw. The greatest growth rate was obtained in presence of gelatin. Lipase and amylase production was detected in small amounts. Fungal growth in media with hydrocarbon mixtures increased the pathogenicity of the two strains of P. lilacinum, with the strain JQ926223 being more virulent. The information obtained is important for achieving both an increase in insecticidal capacity and an understanding of physiological adaptation of the fungus.Fil: Barra, Paula Sabina. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; ArgentinaFil: Etcheverry, Miriam Graciela. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; ArgentinaFil: Nesci, Andrea Verónica. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; ArgentinaMDPI AG2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/62589Barra, Paula Sabina; Etcheverry, Miriam Graciela; Nesci, Andrea Verónica; Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum; MDPI AG; Insects; 6; 1; 3-2015; 206-2232075-4450CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3390/insects6010206info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-4450/6/1/206info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-05T09:45:43Zoai:ri.conicet.gov.ar:11336/62589instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-11-05 09:45:44.247CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
title Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
spellingShingle Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
Barra, Paula Sabina
Entomopathogenic Fungi
Enzymes
Insects
Virulence
title_short Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
title_full Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
title_fullStr Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
title_full_unstemmed Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
title_sort Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum
dc.creator.none.fl_str_mv Barra, Paula Sabina
Etcheverry, Miriam Graciela
Nesci, Andrea Verónica
author Barra, Paula Sabina
author_facet Barra, Paula Sabina
Etcheverry, Miriam Graciela
Nesci, Andrea Verónica
author_role author
author2 Etcheverry, Miriam Graciela
Nesci, Andrea Verónica
author2_role author
author
dc.subject.none.fl_str_mv Entomopathogenic Fungi
Enzymes
Insects
Virulence
topic Entomopathogenic Fungi
Enzymes
Insects
Virulence
purl_subject.fl_str_mv https://purl.org/becyt/ford/4.4
https://purl.org/becyt/ford/4
dc.description.none.fl_txt_mv Entomopathogenic fungi can regulate insect populations. They have extracellular enzymes that degrade cuticle components, mainly hydrocarbons, used as an energy source. The increase in insecticidal activity of fungi in a medium supplemented with cuticular hydrocarbons was assayed and the hydrolytic enzyme profiles of two strains of Purpureocillium lilacinum were evaluated. A spore suspension of P. lilacinum was inoculated in Petri plates with different values (0.99–0.97–0.95) of water activity (Aw) using the substrates gelatin, starch and tween-20. Growth rate on the different substrates and the enzymatic activity index for proteases, amylases and lipases at different incubation times, pH and Aw, was evaluated. Moreover, the insecticidal efficiency of strains grown in media supplemented with n-hexadecane and n-octacosane was analyzed. LT50 was calculated against adults of Tribolium confusum and showed that mortality increased about 15% when the strains grew in amended culture medium. High amylolytic activity was detected, but proteases were the main enzymes produced. Optimal protease production was observed in a range of acid and alkaline pH and lower Aw. The greatest growth rate was obtained in presence of gelatin. Lipase and amylase production was detected in small amounts. Fungal growth in media with hydrocarbon mixtures increased the pathogenicity of the two strains of P. lilacinum, with the strain JQ926223 being more virulent. The information obtained is important for achieving both an increase in insecticidal capacity and an understanding of physiological adaptation of the fungus.
Fil: Barra, Paula Sabina. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; Argentina
Fil: Etcheverry, Miriam Graciela. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; Argentina
Fil: Nesci, Andrea Verónica. Universidad Nacional de Rio Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Microbiología e Inmunología. Cátedra de Ecología Microbiana; Argentina
description Entomopathogenic fungi can regulate insect populations. They have extracellular enzymes that degrade cuticle components, mainly hydrocarbons, used as an energy source. The increase in insecticidal activity of fungi in a medium supplemented with cuticular hydrocarbons was assayed and the hydrolytic enzyme profiles of two strains of Purpureocillium lilacinum were evaluated. A spore suspension of P. lilacinum was inoculated in Petri plates with different values (0.99–0.97–0.95) of water activity (Aw) using the substrates gelatin, starch and tween-20. Growth rate on the different substrates and the enzymatic activity index for proteases, amylases and lipases at different incubation times, pH and Aw, was evaluated. Moreover, the insecticidal efficiency of strains grown in media supplemented with n-hexadecane and n-octacosane was analyzed. LT50 was calculated against adults of Tribolium confusum and showed that mortality increased about 15% when the strains grew in amended culture medium. High amylolytic activity was detected, but proteases were the main enzymes produced. Optimal protease production was observed in a range of acid and alkaline pH and lower Aw. The greatest growth rate was obtained in presence of gelatin. Lipase and amylase production was detected in small amounts. Fungal growth in media with hydrocarbon mixtures increased the pathogenicity of the two strains of P. lilacinum, with the strain JQ926223 being more virulent. The information obtained is important for achieving both an increase in insecticidal capacity and an understanding of physiological adaptation of the fungus.
publishDate 2015
dc.date.none.fl_str_mv 2015-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/62589
Barra, Paula Sabina; Etcheverry, Miriam Graciela; Nesci, Andrea Verónica; Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum; MDPI AG; Insects; 6; 1; 3-2015; 206-223
2075-4450
CONICET Digital
CONICET
url http://hdl.handle.net/11336/62589
identifier_str_mv Barra, Paula Sabina; Etcheverry, Miriam Graciela; Nesci, Andrea Verónica; Improvement of the insecticidal capacity of two Purpureocillium Lilacinum strains against Tribolium Confusum; MDPI AG; Insects; 6; 1; 3-2015; 206-223
2075-4450
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3390/insects6010206
info:eu-repo/semantics/altIdentifier/url/https://www.mdpi.com/2075-4450/6/1/206
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI AG
publisher.none.fl_str_mv MDPI AG
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.087074

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