Fecha/hora: 01/06/2024 16:03:21

Biblioteca(s): 	INIA La Estanzuela; INIA Las Brujas.	
Fecha corriente: 	24/09/2014	
Fecha de la última actualización: 	08/08/2017	
Autoria: 	BATISTA, L.; IRISARRI, L.; REBUFFO, M.; CUITIÑO, M.J.; SANJUÁN, J.; MONZA , J.	
Afiliación: 	LETICIA BATISTA, Universidad de la República (UdelaR)/ Facultad de Agronomía; PILAR IRISARRI, Universidad de la República (UdelaR)/ Facultad de Agronomía; MONICA IRENE REBUFFO GFELLER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; MARIA JOSE CUITIÑO DE VEGA, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; JUAN SANJUÁN, Estación Experimental del Zaidín; JORGE MONZA, Universidad de la República (UdelaR)/ Facultad de Agronomía.	
Título: 	Nodulation competitiveness as a requisite for improved rhizobial inoculants of Trifolium pratense.	
Año de publicación: 	2015	
Fuente/Imprenta: 	Biology and Fertility of Soils , v. 51, n. 1, p. 11-20, 2015	
ISSN: 	0178-2762.	
DOI: 	10.1007/s00374-014-0946-3	
Idioma: 	Inglés	
Notas: 	Received: 21 April 2014 /Revised: 14 July 2014 /Accepted: 16 July 2014 /Published online: 27 July 2014	
Contenido: 	ABSTRACT.

Red clover (Trifolium pratense L.) is used in the improvement of grasslands in Uruguay and has been inoculated with commercial strain U204 of Rhizobium leguminosarum bv trifolii since 1970s. Native-naturalized rhizobia strains present in soil are the basis for selecting and developing new inoculants. With this aim, we evaluated the diversity of red clover rhizobia in Uruguayan red clover pastures both historically inoculated with U204 and noninoculated ones. Thirty-eight different enterobacterial repetitive intergenic consensus (ERIC) PCR genomic fingerprints were identified, albeit surprisingly only one of 80 isolates showed an ERIC profile similar to U204. Under controlled conditions, red clover plants inoculated with one of the native isolates, strain 317, produced more biomass than those inoculated with the commercial U204. ERIC-PCR was also used to show that strain 317 competed for nodulation better than U204 in a field with previous history of inoculation. Moreover, both U204 and 317 were tagged with a gusA reporter gene and their competitiveness for nodulation assessed in various soil types. Again, strain 317 appeared more competitive than U204, particularly in soils with previous history of inoculation. Our results reinforce the long-known idea of assessing the actual needs of inoculation of legumes in different soils and suggest that the indigenous isolate 317 is an effective and competitive strain that can be used for development of a new red clover inoculant.

@ Springer-Verlag Berlin Heidelberg 2014	
Palabras-Clave: 	DNA FINGERPRINTING; GusA; RED CLOVER; RHIZOBIUM  LEGUMINOSARUM; RHIZOBIUM LEGUMINOSARUM BV TRIFOLI; TRÉBOL ROJO; TRIFOLIUM PRATENSE.	
Thesagro: 	MEJORAMIENTO DE LEGUMINOSAS.	
Categoría del tema: 	F30 Genética vegetal y fitomejoramiento	
Registro original: 	INIA Las Brujas (LB)	
Ejemplares: 	LB - (100893-1) - PXI - AP - DD -  -  -  - DIS
LE - (100211-1) - PXI - AP - DD -  -  -  - DIS