Data/hora: 13/06/2024 08:22:50

Biblioteca(s): 	Embrapa Meio-Norte.	
Data corrente: 	14/10/1998	
Data da última atualização: 	14/10/1998	
Autoria: 	WU, C. H.; WARREN, H. L.; SITARAMAN, K.; TSAI, C. Y.	
Título: 	Translational alterations in maize leaves responding to pathogen infection, paraquat treatment, or heat shock. Polysome dissociation and accumulation of a 57 kilodalton protein.	
Ano de publicação: 	1988	
Fonte/Imprenta: 	Plant Physiology, v.86, n.4, p.1323-1329, 1988.	
Idioma: 	Inglês	
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.	
Palavras-Chave: 	Choque de calor; Heat shoch; Herbicide; Maize; Patogenos; Reacao; Reaction.	
Thesagro: 	Colletotrichum Graminicola; Herbicida; Milho; Zea Mays.	
Thesaurus Nal: 	Bipolaris maydis; infection; pathogens.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Meio-Norte (CPAMN)	
Exemplares: 	CPAMN - (6080-1) - ADC - SP - -- - S 11401 -  - S 11401 - DIS