Data/hora: 24/06/2024 21:52:50

Biblioteca(s): 	Embrapa Meio Norte / UEP-Parnaíba.	
Data corrente: 	20/08/1996	
Data da última atualização: 	20/08/1996	
Autoria: 	GATEHOUSE, A. M. R.; BARBIERI, L.; STIRPE, F.; CROY, R. R. D.	
Título: 	Effects of ribosome inactivating proteins on insect development - differences between Lepidoptera and Coleoptera.	
Ano de publicação: 	1990	
Fonte/Imprenta: 	Entomologia Experimentalis et Applicata, v.54, p.43-51, 1990.	
Idioma: 	Inglês	
Conteúdo: 	Ricin and saporin represent two different classes of ribosome inactivating proteins (RIPs), or cytotoxins, present in plant seeds. The toxicity of these substances to several eukaryotic organisms is widely known, as is their intracellular mode of inhibitory action on the ribosomes. However virtually nothing is known of the effects of these substances on insects. In this paper we report on systematic studies which indicate that RIPs can be extremely toxic to insects although the effectsare variable with different insect orders. Specifically, two Coleopteran species were extremely susceptible to the effects of both RIP's with average LD50 values of less than 10 elevado a -2% (dry weight). The studies also indicate that resistance to the toxic effects, exhibited by Lepidoptera insects, may be due in part to the protease complementsof the insect guts wich are capable of hydrolysing the RIPs, thus eliminating them before they are absorbed and can exert their effects within the insects cells.	
Palavras-Chave: 	Insect pest; Praga de inseto; RIPs; Toxin.	
Thesagro: 	Toxina.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP)	
Exemplares: 	CPAMN-UEPP - (6985-1) - ADP - SP - -- -  -  - 1996.00203 - DIS