Data/hora: 23/09/2024 16:17:22

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	11/02/2011	
Data da última atualização: 	06/04/2011	
Autoria: 	EIRAS, M.; SILVA, S. R. da; STUCHI, E. S.; FLORES, R.; DARÓS, J. A.	
Afiliação: 	Marcelo Eiras, CPDSV; Simone Rodrigues da Silva, ESALQ/USP; EDUARDO SANCHES STUCHI, CNPMF; Ricardo Flores, CSIC; José Antonio Daròs, CSIC.	
Título: 	Viroid species associated with the bark-cracking phenotype of 'Tahiti' acid lime in the State of São Paulo, Brazil.	
Ano de publicação: 	2010	
Fonte/Imprenta: 	Tropical Plant Pathology, Brasília, DF, v. 35, n. 5, p. 303-309, 2010.	
Idioma: 	Português	
Notas: 	Short communication	
Conteúdo: 	Viroids have been used as "graft transmissible dwarfing agents" (GTDA) in several countries, mainly to reduce growth of citrus trees, thus increasing their density in orchards. In the State of São Paulo, Brazil, plants of the acid lime 'Tahiti' are usually grafted with a complex of GTDA, presumably viroids. The aim of the present work was the identification and molecular characterization of the viroids infecting trees of acid lime 'Tahiti' displaying "Quebra galho" (bark-cracking). Viroids were identified and characterized by biological indexing in 'Etrog' citron, Northern-blot hybridization, RT-PCR, cloning and complete sequencing of the RNA genomes. Citrus exocortis viroid (CEVd), Hop stunt viroid (HSVd) and Citrus dwarfing viroid (CDVd) were found in different combinations. Although we have not been able to infer a direct relationship between the agronomical performance and symptom severity with the presence of a specific viroid or viroid combination, the differences in the severity of "Quebra-galho" symptoms among different trees is probably associated with the presence (or absence) of CEVd, with its interaction with other viroids perhaps determining the different phenotypes observed in the field.	
Palavras-Chave: 	Citrus dwarfing; Exocortis; Xyloporosis.	
Thesaurus Nal: 	cachexia; Pospiviroid; Pospiviroidae.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (27416-1) - UPC - AP - PP -  -  -  - PCT