Data/hora: 24/09/2024 13:59:28

Biblioteca(s): 	Embrapa Mandioca e Fruticultura.	
Data corrente: 	10/01/2008	
Data da última atualização: 	29/01/2008	
Autoria: 	MURCIA, N.; BEDERSKI, K.; WULFF, N. A.; BARBOSA, C. de J.; BOVÉ, J. M.; DURAN-VILA, N.	
Afiliação: 	N. Murcia, IVIA; K. Bederski, Topara Nursery; N. A. Wulff, Fundecitrus; Cristiane de Jesus Barbosa, CNPMF; J. M. Bové, INRA; N. Duran-Vila, IVIA.	
Título: 	Viroids in Tahiti limes showing bark cracking symptoms.	
Ano de publicação: 	2007	
Fonte/Imprenta: 	In: CONFERENCE OF THE INTERNATIONAL ORGANIZATION OF CITRUS VIROLOGISTS, 17., 2007, Adana. Program & Abstracts. Adana: [s.n.], 2007. p.103.	
Idioma: 	Inglês	
Conteúdo: 	The so-called "quebra-galho" clone of Tahiti lime is very popular in Brazil, because the small size of the trees is suitable for high density plantings. These Tahiti lime trees are easily recognized because they present bark cracking symptoms, wich have been claimed to be associated with "exocortis" infection. Viroid infection of two "quebra-galho" Tahiti lime tress from a farm near  Araraquara in the state of  São de Paulo, Brazil, was assessed by graft-inoculation into Etrog citron, followed by sPAGE analysis and Northern-blot hybridization using viroid-specific probes. Both trees were found to be infected with Citrus exocortis viroid (CEVd) and Citrus viroid III (CVd-III). Similarly, five clones of Tahiti lime from different origins and available at Topara Nursey, near Chincha, Peru, were also tested for viroids. The four clones that displayed characteristic bark-cracking symptoms were found to be infected with CEVd, HSVd and CVd-III, whereas the clones that did not present bark-craking symptoms were either viroid-free or only infected with CVd-III. "Quebra-galho" symptoms differ from those of the wood-pocket disease of Tahiti lime bacause, apparently, they lack the symptoms of leaf blotch, wood-staining and fruit sectoring. Therefore both affections are most probably unrelated. Since the presence of viroids, and in particular CEVd, in "quebra-galho" limes might only be circumstantial, assays are being conducted to establish if viroids are indeed the cause of "quebra-galho" bark cracking symptoms.	
Palavras-Chave: 	Quebra galho.	
Thesagro: 	Doença; Fruta Cítrica; Vírus.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Mandioca e Fruticultura (CNPMF)	
Exemplares: 	CNPMF - (23878-1) - UPC - SP - -- - S12548 -  - 12548 - DIS