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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
22/02/2018 |
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Actualizado : |
22/02/2018 |
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Autor : |
LABANDERA, C.A.; VINCENT, J.M. |
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Título : |
Competition between an introduced strain and native Uruguayan strains of Rhizobium trifolii. |
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Fecha de publicación : |
1975 |
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Fuente / Imprenta : |
In: Plant and Soil, 1975, v. 42, p. 327-347. |
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Idioma : |
Español |
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Contenido : |
The relative success of a commercial strain (TA1) competing with ineffective Uruguayan strains of Rhizobium trifolii for the colonisation of the root surface and in forming nodules has been tested with Trifolium subterraneum and T. vepens, and with a species indigenous to Uruguay (T. polymorphum). Competing pairs of strains were tested on hosts, raised from surface-sterilized seed and maintained on seedling agar in tube culture, so as to permit representation on the root surface and in each nodule to be determined. Relative nodulation success was estimated as a competitive index (C): the ratio of nodules formed by one strain to those formed by the other when equally represented on the root surface.
On T. repens and T. subterraneum the effective strain (TA1) dominated the ineffective Uruguayan competitor (U73) so that CTA1:U73 ranged from 18 to greater than 94, and its success was very little dependent on relative representation on the root surface. On T. polymorphum, with which TA1 and U73 were both ineffective, the former was still superior (CTA1:U73=2?4), but was not as dominant as it was on the other two hosts; its success was more dependent on its root-surface representation. A mixture of several, all ineffective, Uruguayan strains narrowed the competitive advantage of strain TA1 and caused its relative nodulating success to become more dependent on representation on the root.
The greater intrinsic nodulating competitiveness of strain TA1 was to some extent offset by its relatively poor colonisation of the root surface, where it could be outgrown by the Uruguayan strains, particularly when a medium or low level of inoculation permitted considerable growth. Delay in the addition of TA1 to an established population of U73 resulted in additional representation of the latter in nodules of T. subterraneum. However strain U73 was largely restricted to the earlier-formed nodules and the total, as distinct from the proportion, of TA1 nodules was largely unaffected by the start given its competitor.
Nodules due to mixed infections were regularly encountered (up to 18%), particularly in the case of T. subterraneum.
It was not possible to find in any of the strains' symbiotic properties a consistent explanation of their competitiveness in nodule formation. However it is perhaps significant that TA1 (the more successful strain) formed its first nodule slightly ahead of its competitors. MenosThe relative success of a commercial strain (TA1) competing with ineffective Uruguayan strains of Rhizobium trifolii for the colonisation of the root surface and in forming nodules has been tested with Trifolium subterraneum and T. vepens, and with a species indigenous to Uruguay (T. polymorphum). Competing pairs of strains were tested on hosts, raised from surface-sterilized seed and maintained on seedling agar in tube culture, so as to permit representation on the root surface and in each nodule to be determined. Relative nodulation success was estimated as a competitive index (C): the ratio of nodules formed by one strain to those formed by the other when equally represented on the root surface.
On T. repens and T. subterraneum the effective strain (TA1) dominated the ineffective Uruguayan competitor (U73) so that CTA1:U73 ranged from 18 to greater than 94, and its success was very little dependent on relative representation on the root surface. On T. polymorphum, with which TA1 and U73 were both ineffective, the former was still superior (CTA1:U73=2?4), but was not as dominant as it was on the other two hosts; its success was more dependent on its root-surface representation. A mixture of several, all ineffective, Uruguayan strains narrowed the competitive advantage of strain TA1 and caused its relative nodulating success to become more dependent on representation on the root.
The greater intrinsic nodulating competitiveness of strain TA1 was to some extent offset by i... Presentar Todo |
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Thesagro : |
URUGUAY. |
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Asunto categoría : |
-- |
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Marc : |
LEADER 02840naa a2200145 a 4500
001 1058144
005 2018-02-22
008 1975 bl uuuu u00u1 u #d
100 1 $aLABANDERA, C.A.
245 $aCompetition between an introduced strain and native Uruguayan strains of Rhizobium trifolii.
260 $c1975
520 $aThe relative success of a commercial strain (TA1) competing with ineffective Uruguayan strains of Rhizobium trifolii for the colonisation of the root surface and in forming nodules has been tested with Trifolium subterraneum and T. vepens, and with a species indigenous to Uruguay (T. polymorphum). Competing pairs of strains were tested on hosts, raised from surface-sterilized seed and maintained on seedling agar in tube culture, so as to permit representation on the root surface and in each nodule to be determined. Relative nodulation success was estimated as a competitive index (C): the ratio of nodules formed by one strain to those formed by the other when equally represented on the root surface. On T. repens and T. subterraneum the effective strain (TA1) dominated the ineffective Uruguayan competitor (U73) so that CTA1:U73 ranged from 18 to greater than 94, and its success was very little dependent on relative representation on the root surface. On T. polymorphum, with which TA1 and U73 were both ineffective, the former was still superior (CTA1:U73=2?4), but was not as dominant as it was on the other two hosts; its success was more dependent on its root-surface representation. A mixture of several, all ineffective, Uruguayan strains narrowed the competitive advantage of strain TA1 and caused its relative nodulating success to become more dependent on representation on the root. The greater intrinsic nodulating competitiveness of strain TA1 was to some extent offset by its relatively poor colonisation of the root surface, where it could be outgrown by the Uruguayan strains, particularly when a medium or low level of inoculation permitted considerable growth. Delay in the addition of TA1 to an established population of U73 resulted in additional representation of the latter in nodules of T. subterraneum. However strain U73 was largely restricted to the earlier-formed nodules and the total, as distinct from the proportion, of TA1 nodules was largely unaffected by the start given its competitor. Nodules due to mixed infections were regularly encountered (up to 18%), particularly in the case of T. subterraneum. It was not possible to find in any of the strains' symbiotic properties a consistent explanation of their competitiveness in nodule formation. However it is perhaps significant that TA1 (the more successful strain) formed its first nodule slightly ahead of its competitors.
650 $aURUGUAY
700 1 $aVINCENT, J.M.
773 $tIn: Plant and Soil, 1975$gv. 42, p. 327-347.
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INIA Tacuarembó (TBO) |
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| Registros recuperados : 17 | |
| 1. |  | LABANDERA, C. Evaluación de cultivares de alfalfa. Programa Nacional de Evaluación de Cultivares In: INIA (Instituto Nacional de Investigación Agropecuaria); MGAP (Ministerio Ganadería, Agricultura y Pesca); IPA (Instituto Plan Agropecuario). Jornada de Alfalfa: Todo lo que usted quiería saber sobre la reina de las forrajeras. (Jornada de Alfalfa, Colonia, Uruguay, 1998). Colonia (Uruguay): INIA, MGAP, Plan Agropecuario, 1998. p. 6-8| Biblioteca(s): INIA Las Brujas; INIA Tacuarembó. |
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| 3. | | LABANDERA, C.; JAURENA, M. Aspectos rhizobiológicos. ln: INIA Tacuarembó. Unidad Experimental Glencoe. Visita guiada sobre Lotononis INIA Glencoe. Tacuarembó (Uruguay): INIA, 2004. p. 6 (INIA Serie Actividades de Difusión ; 393)| Biblioteca(s): INIA Tacuarembó. |
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| 9. | | INIA (INSTITUTO NACIONAL DE INVESTIGACIÓN AGROPECUARIA); LABANDERA, C. Resultados experimentales de evaluación de cultivares. Especies forrajeras Parte II: Bianuales y perennes 1999. Programa Nacional de Evaluación de Cultivares. Unidad de Biometría, Protección Vegetal, Malezas. La Estanzuela: INIA, 1999. 63 p. Programa Nacional de Evaluación de Cultivares: Sergio Ceretta, Marcel Labandera, Diego Vilaró, Marina Castro, Juan Caffarel, Mauricio Sastre. Unidad de Biometría: Vilfredo Ibáñez. Protección Vegetal: Nora Altier, Rosario Alzugaray....| Biblioteca(s): INIA Tacuarembó. |
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| 12. | | Labandera, C.; Milian, A.; Baraibar, A.; Pagliano, D.; Russell, H.; Pastorini, D. Calidad de inoculantes, número de rizobios en la semilla y su efecto en la implantación y persistencia de las leguminosas ln: Seminario Nacional de Campo Natural, 2 : 1990 nov 15-16 : Tacuarembó Montevideo (Uruguay): Hemisferio Sur, 1990. p267-269 Participaron en el seminario : INIA, Sociedad Uruguaya de Pasturas Naturales, Facultad de Agronomía, Plan Agropecuario| Biblioteca(s): INIA La Estanzuela. |
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| 13. | | HERNANDEZ, S.; REBUFFO, M.; ARRIVILLAGA, S.; JAURENA, M.; LABANDERA, C.; RISSO, D.; CILIUTI, J. Evaluation of the genotype-environment interaction in the establishment of Lotus uliginosus (Schkuhr) with soil-cores. Lotus Newsletter, 2005, Volume 35, Issue 1, pages 120-130.| Tipo: Artículos Indexados |
| Biblioteca(s): INIA La Estanzuela. |
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| 14. | | AMARANTE, P.; FERENCZI, M.; JAURENA, M.; LABANDERA, C.; GARCÍA PRÉCHAC, F. Introducción de especies forrajeras en campo natural, comparando siembra directa en líneas con voleo superficial en combinación con diferentes tipos y dosis de herbicidas ln: Congreso Nacional de Ingeniería Agronómica, 7.; Jornada de Siembra Directa, 1997, Montevideo, Uruguay Compendio de trabajos presentados. Montevideo (Uruguay): Asociación de Ingenieros Agrónomos del Uruguay, 1997. p. 123-125| Tipo: Trabajos en Congresos/Conferencias |
| Biblioteca(s): INIA Treinta y Tres. |
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| 16. | | REYNO, R.; JAURENA, M.; REAL, D.; ZARZA, M.; MEROLA, R.; VIANA, A.; DALLA RIZZA, M.; LABANDERA, C. Evaluación de leguminosas forrajeras promisorias en la zona de areniscas ln: Bemhaja, M.; Pittaluga, O., eds. 30 años de investigación en suelos de areniscas, INIA Tacuarembó. Montevideo (Uruguay): INIA, 2006. p. 57-60 (INIA Serie Técnica ; 159)| Tipo: Capítulo en Libro Técnico-Científico |
| Biblioteca(s): INIA Las Brujas; INIA Tacuarembó. |
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| 17. | | REAL, D.; REYNO, R.; ZARZA, M.; MEROLA, R.; VIANA, A.; DALLA RIZZA, M.; ALTIER, N.; LABANDERA, C.; JAURENA, M.; LARGUERO, S. Ornithopus Pinnatus: Leguminosa forrajera anual promisoria para mejoramiento de campo. ln: INIA TACUAREMBÓ. ESTACIÓN EXPERIMENTAL GLENCOE. Día de campo. Producción animal, pasturas. Estación Experimental Glencoe, Paysandú, 14 noviembre, 2006. Tacuarembó (Uruguay): INIA, 2006. p. 32-34| Biblioteca(s): INIA Tacuarembó. |
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| Registros recuperados : 17 | |
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