Fecha/hora: 03/06/2024 04:45:14

Biblioteca(s): 	INIA Treinta y Tres.	
Fecha corriente: 	09/03/2018	
Fecha de la última actualización: 	24/09/2018	
Autoria: 	GARCÍA, J.A.; GARCÍA Y SANTOS, C.; ROSAS, J.E.; DUTRA, F.; GARDNER, D.	
Afiliación: 	JUAN AGUSTÍN GARCÍA, Centro Universitario Regional Este, Universidad de la República, Uruguay.; CARMEN GARCÍA Y SANTOS, Departamento de Toxicología, Facultad de Veterinaria, Universidad de la República, Uruguay.; JUAN EDUARDO ROSAS CAISSIOLS, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; FERNANDO DUTRA, DILAVE (División Laboratorios Veterinarios), Regional Este, MGAP, Uruguay.; DALE GARDNER, USDA, ARX, Poisonuous Plant Research Laboratory, USA.	
Título: 	A survey of Senecio spp. affecting livestock in Uruguay and their associated pyrrolizidine alkaloid content.	
Año de publicación: 	2018	
Fuente/Imprenta: 	Ciência Rural, feb., 2018, v.48(2), p. e20170621.	
ISSN: 	1678-4596	
DOI: 	10.1590/0103-8478cr20170621	
Idioma: 	Inglés	
Notas: 	Article history: Received 09.04.17; Approved 11.30.17 Returned by the author 12.27.17. CR-2017-0621.R1	
Contenido: 	ABSTRACT:
In Eastern Uruguay there has been a significant increase of seneciosis in grazing livestock with most affected localities related to counties neighboring the Brazilian border. A survey in 28 farms associated with poisoning outbreaks in grazing cattle in Eastern Uruguay was carried out. Fifty populations of Senecio plants were collected for alkaloid analysis and species identification. Four species were identified: S. oxyphyllus DC, S. madagascariensis Poir, S. brasiliensis (Spreng.) Less., and S. selloi DC. Alkaloids were identified by a combination of GC-MS and HPLC-MS analysis and included: retrorsine in S. oxyphyllus; retrorsine, usaramine, and senecivernine/senecionine in S. selloi; retrorsine, senecivernine/senecionine, integerrimine, and usaramine in S. madagascariensis; and integerrimine, retrorsine and senecionine in S. brasiliensis. Total mean alkaloid concentration was reported to be highest in S. brasiliensis (17.6mg/g) followed by S. oxyphyllus (6.2mg/g), S. selloi (1.8mg/g) and S. adagascariensis (0.6mg/g). Alkaloid concentrations were also reported to be higher in 2015 vs. 2016 probably due to a common environmental factor. The species S. oxyphyllus and S. madagascariensis were not previously recognized as toxic plants in Eastern Uruguay. Particularly, S. oxyphyllus was present in 82% of the farms surveyed and occurred in high density with relative high concentrations of pyrrolizidine alkaloids suggesting S. oxyphyllus may be the main species involved in the reported outbreaks of seneciosis.	
Palabras-Clave: 	ASTERACEAE; PLANT SECONDARY METABOLITES; PLANTAS TÓXICAS; POISONOUS PLANTS; SENECIOSIS.	
Thesagro: 	RUMIANTES; SENECIO.	
Categoría del tema: 	Q53 Contaminación y toxicología de alimentos para animales	
URL: 	http://www.ainfo.inia.uy/digital/bitstream/item/8891/1/Rosas-Arb-2018-1.pdf	
Registro original: 	INIA Treinta y Tres (TT)	
Ejemplares: 	TT - (102333-1) - PXI - AP - DD - PP/CIENCIA-RURAL/2018/ROSAS -  -  - DIS