Data/hora: 17/06/2024 08:20:51

Biblioteca(s): 	Embrapa Hortaliças; Embrapa Semiárido.	
Data corrente: 	05/07/2006	
Data da última atualização: 	14/01/2020	
Autoria: 	QUEZADO-DUVAL, A. M.; LOPES, C. A.; LEITE JÚNIOR, R. P.; LIMA, M. F.; CAMARGO, L. E. A.	
Afiliação: 	ALICE MARIA QUEZADO DUVAL, CNPH; CARLOS ALBERTO LOPES, CNPH; MIRTES FREITAS LIMA, CPATSA.	
Título: 	Diversity of Xanthomonas spp. associated with bacterial spot of processing tomatoes in Brazil.	
Ano de publicação: 	2005	
Fonte/Imprenta: 	Acta Horticulturae, The Hague, Leuven, n. 695, p. 101-108, Nov. 2005.	
Idioma: 	Inglês	
Conteúdo: 	Bacterial spot has become a major problem in Brazilian processing tomato fields due to favorable environmental conditions, lack of resistant cultivars or lack of efficient chemical control. The occurrence of genetic groups/species of Xanthomonas associates with bacterial spot in tomato in Brazil was studied from 1995 to 2000, upon phenotypic and genotypic characterization of 447 strains collected in commercial fields in the Central-West and Northeast. The four recently described Xanthomonas species associated with bacterial spot of tomato were detected. The populations from de Central-West were mainly composed of X. gardneri (group D/race T2). Xanthomonas vesicatoria (group B/race T2) and X. euvesicatoria (group A/race T1) were also present in some fields but at low rates. In the Northeast, only X. euvesicatoria (group A/rece T1) and X. perforans (group C/race T3) were found. Genetic variability was analysed using pulsed-field electrophoresis. Strains of X. euvesicatoria, which were collected mostly from a open pollinated variety, were more variable in contrast with those of X. vesicatoria, X. perforans, and X. gardneri. Further collection and characterization of 53 strains from 2002 and 2003 revealed that race T3 is already present in the Central-West associated with imported hybrid cultivars. Surveys on bacterial spot occurrence shold be continuous in order to detect evntual changes in population composition.	
Palavras-Chave: 	Cultivar resistente; Tomate industrial.	
Thesagro: 	Análise Química; Bactéria; Controle Químico; Doença; Eletroforese; Lycopersicon Esculentum; Processamento; Tomate.	
Thesaurus Nal: 	Cultivars; Disease control; Tomatoes; Xanthomonas.	
Categoria do assunto: 	--
H Saúde e Patologia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/208763/1/Quezado-Duval-et-al-Diversity-of-zanthomonas...-2005.pdf	
Registro original: 	Embrapa Hortaliças (CNPH)	
Exemplares: 	CPATSA - (34408-1) - UPC - AP - PP - 00440 -  - 00440 - DIS
CNPH - (31523-1) - UPC - AP - DD - SP 017049 -  - 017049 - DIS