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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
14/10/1998 |
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Data da última atualização: |
14/10/1998 |
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Autoria: |
WU, C. H.; WARREN, H. L.; SITARAMAN, K.; TSAI, C. Y. |
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Título: |
Translational alterations in maize leaves responding to pathogen infection, paraquat treatment, or heat shock. Polysome dissociation and accumulation of a 57 kilodalton protein. |
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Ano de publicação: |
1988 |
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Fonte/Imprenta: |
Plant Physiology, v.86, n.4, p.1323-1329, 1988. |
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Idioma: |
Inglês |
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Conteúdo: |
Translational alterations occur in maize (Zea mays L.) leaves stressed by pathogen infection or herbicide paraquat treatment. These translational changes include: a)dissociation of large polysomes to small polysomes, monosomes, and subunits; b)a decreased rate of total protein synthesis; and c)a reduced synthesis of several proteins by polysomes in vitro. The polysome dissociation was neither due to an extraction artifact nor to degradation of RNA by RNase. The protein patterns of polysomes isolated from leaves inoculated with Bipolaris maydis at 6 to 48 hours showed an increase in the intensity of a 57 kilodalton protein. When inoculated with less virulent pathogens, such as B. zeicola, Exserohilum turcium, or Colletotrichum graminicola, the protein was accumulated in polysomes of leaves at 24 to 48 hours after inoculation. The 57 kilodalton protein was also accumulated in polysomes of maize leaves responding to heat shock or herbicide paraquat treatments. The purified 57 kilodalton protein reassociated with polysomes isolated from healthy leaves and inhibited polysomal translation in vitro. Since the 57 kilodalton protein is rapidly accumulated in maize polysomes in response to various biological and environmental stresses and may affect protein synthesis, it may be involved in translational regulation of maize leaves during stress response. |
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Palavras-Chave: |
Choque de calor; Heat shoch; Herbicide; Maize; Patogenos; Reacao; Reaction. |
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Thesagro: |
Colletotrichum Graminicola; Herbicida; Milho; Zea Mays. |
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Thesaurus Nal: |
Bipolaris maydis; infection; pathogens. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02279naa a2200325 a 4500
001 1054850
005 1998-10-14
008 1988 bl --- 0-- u #d
100 1 $aWU, C. H.
245 $aTranslational alterations in maize leaves responding to pathogen infection, paraquat treatment, or heat shock. Polysome dissociation and accumulation of a 57 kilodalton protein.
260 $c1988
520 $aTranslational alterations occur in maize (Zea mays L.) leaves stressed by pathogen infection or herbicide paraquat treatment. These translational changes include: a)dissociation of large polysomes to small polysomes, monosomes, and subunits; b)a decreased rate of total protein synthesis; and c)a reduced synthesis of several proteins by polysomes in vitro. The polysome dissociation was neither due to an extraction artifact nor to degradation of RNA by RNase. The protein patterns of polysomes isolated from leaves inoculated with Bipolaris maydis at 6 to 48 hours showed an increase in the intensity of a 57 kilodalton protein. When inoculated with less virulent pathogens, such as B. zeicola, Exserohilum turcium, or Colletotrichum graminicola, the protein was accumulated in polysomes of leaves at 24 to 48 hours after inoculation. The 57 kilodalton protein was also accumulated in polysomes of maize leaves responding to heat shock or herbicide paraquat treatments. The purified 57 kilodalton protein reassociated with polysomes isolated from healthy leaves and inhibited polysomal translation in vitro. Since the 57 kilodalton protein is rapidly accumulated in maize polysomes in response to various biological and environmental stresses and may affect protein synthesis, it may be involved in translational regulation of maize leaves during stress response.
650 $aBipolaris maydis
650 $ainfection
650 $apathogens
650 $aColletotrichum Graminicola
650 $aHerbicida
650 $aMilho
650 $aZea Mays
653 $aChoque de calor
653 $aHeat shoch
653 $aHerbicide
653 $aMaize
653 $aPatogenos
653 $aReacao
653 $aReaction
700 1 $aWARREN, H. L.
700 1 $aSITARAMAN, K.
700 1 $aTSAI, C. Y.
773 $tPlant Physiology$gv.86, n.4, p.1323-1329, 1988.
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