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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
20/08/1996 |
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Data da última atualização: |
20/08/1996 |
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Autoria: |
GATEHOUSE, A. M. R.; BARBIERI, L.; STIRPE, F.; CROY, R. R. D. |
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Título: |
Effects of ribosome inactivating proteins on insect development - differences between Lepidoptera and Coleoptera. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Entomologia Experimentalis et Applicata, v.54, p.43-51, 1990. |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Insect pest; Praga de inseto; RIPs; Toxin. |
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Thesagro: |
Toxina. |
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Categoria do assunto: |
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Marc: |
LEADER 01618naa a2200217 a 4500
001 1078030
005 1996-08-20
008 1990 bl --- 0-- u #d
100 1 $aGATEHOUSE, A. M. R.
245 $aEffects of ribosome inactivating proteins on insect development - differences between Lepidoptera and Coleoptera.
260 $c1990
520 $aRicin 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.
650 $aToxina
653 $aInsect pest
653 $aPraga de inseto
653 $aRIPs
653 $aToxin
700 1 $aBARBIERI, L.
700 1 $aSTIRPE, F.
700 1 $aCROY, R. R. D.
773 $tEntomologia Experimentalis et Applicata$gv.54, p.43-51, 1990.
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