Data/hora: 12/06/2024 20:07:26

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 14/03/2013
Data da última atualização: | 14/03/2013
Autoria: | PRADO, J. S. M.; LOURENÇÃO, A. L.; GUEDES, R. N. C.; PALLINI, A.; OLIVEIRA, J. A.; OLIVEIRA, M. G. A.
Afiliação: | JEANNE SCARDINI MARINHO PRADO, CNPMA; A. L. LOURENÇÃO, IAC; R. N. C. GUEDES, Departamento de Entomologia - UFV; A. PALLINI, Departamento de Entomologia - UFV; J. A. OLIVEIRA, Departamento de Química - UFV; M. G. A. OLIVEIRA, Departamento de Bioquímica e Biologia Molecular - UFV.
Título: | Enzymatic response of the eucalypt defoliator Thyrinteina arnobia (Stoll) (Lepidoptera: Geometridae) to a bis-benzamidine proteinase inhibitor.
Ano de publicação: | 2012
Fonte/Imprenta: | Neotropical Entomology, v. 41, p. 420-425, 2012.
Idioma: | Inglês
Conteúdo: | Ingestion of proteinase inhibitors leads to hyperproduction of digestive proteinases, limiting the bioavailability of essential amino acids for protein synthesis, which affects insect growth and development. However, the effects of proteinase inhibitors on digestive enzymes can lead to an adaptive response by the insect. In here, we assessed the biochemical response of midgut proteinases from the eucalypt defoliator Thyrinteina arnobia (Stoll) to different concentrations of berenil, a bisbenzamidine proteinase inhibitor, on eucalyptus. Eucalyptus leaves were immersed in berenil solutions at different concentrations and fed to larvae of T. arnobia. Mortality was assessed daily. The proteolytic activity in the midgut of T. arnobia was assessed after feeding on plants sprayed with aqueous solutions of berenil, fed to fifth instars of T. arnobia for 48 h before midgut removal for enzymatic assays. Larvae of T. arnobia were able to overcome the effects of the lowest berenil concentrations by increasing their trypsin-like activity, but not as berenil concentration increased, despite the fact that the highest berenil concentration resulted in overproduction of trypsin-like proteinases. Berenil also prevented the increase of the cysteine proteinases activity in response to trypsin inhibition.
Palavras-Chave: | Synthetic inhibitor.
Thesaurus Nal: | Pest control; trypsin.
Categoria do assunto: | H Saúde e Patologia
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/79048/1/AP-Marinho-PradoJS-NeotropicalEntomology-B1.pdf
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (12208-1) - UPC - AP - DD -  -  -  - DIS