Título:	The mitochondrial elongation factor LeEF-Tsmt is regulated during tomato fruit ripening and upon wounding and ethylene treatment.
Autoria:	GIRARDI, C. L. BERMUDEZ, K BERNADAC, A. CHAVEZ, A. ZOUINE, M. MIRANDA, F. J. BOUZAYEN, M. PECH, J.-C. LATCH, A.
Afiliação:	CESAR LUIS GIRARDI, CNPUV; Kalina Bermudez, ENSAT-INRA; Anne Bernadac, INRA; Ana Chavez, INRA; Mohamed Zouine, INRA; Fabiola Jaimes Miranda, INRA; Mondher Bouzayen, INRA; Jean-Claude Pech, INRA; Alain Latch, ENSAT-INRA.
Ano de publicação:	2006
Referência:	Postharvest Biology and Technology, Amsterdam, v. 42, n. 1, p. 1-7, 2006.
Conteúdo:	A gene encoding an elongation factor LeEF-Tsmt that participates in the protein synthesis process in mitochondria shows strong expression in ripening fruit as compared to other organs. It is strongly up-regulated during the first stages of the ripening process in parallel with the climacteric rise in respiration. LeEF-Tsmt expression is stimulated by ethylene, wounding and high temperature but ethylene-insensitive mutants exhibit normal expression. Transgenic fruit have been generated in which LeEF-Tsmt has been constitutively up- and down-regulated. Surprisingly, altering the expression of the gene by genetic transformation with antisense and sense LeEF-Tsmt constructs did not affect the pattern of respiration and ethylene production during ripening and upon wounding. In addition, expression of the alternative oxidase gene which is known to play an important role in respiratory climacteric was not affected. Possible reasons for the absence of effect on respiration of variations of LeEF-Tsmt gene expression are discussed.
Thesagro:	Fruticultura Tomate Genética Colheita Maturação Respiração Etileno Dano Lycopersicon Esculentum
Palavras-chave:	Transgenia
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPUV)