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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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Registro original : |
INIA Tacuarembó (TBO) |
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 | Acceso al texto completo restringido a Biblioteca INIA Las Brujas. Por información adicional contacte bibliolb@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Las Brujas. |
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Fecha actual : |
15/10/2014 |
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Actualizado : |
10/02/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
B - 2 |
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Autor : |
CASANOVA, S.; GARCIA, C.; VILARO, F.; CARLESSO, R. |
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Afiliación : |
CLAUDIO CESAR GARCIA GALLARRETA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay; FRANCISCO LUIS VILARO PAREJA, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
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Título : |
Morpho-physiological and yield modifications in two potato cultivars under different irrigation managements. |
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Fecha de publicación : |
2011 |
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Fuente / Imprenta : |
Acta Horticulturae, 2011, no.889, p.445-452. |
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ISSN : |
0567-7572 |
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DOI : |
10.17660/ActaHortic.2011.889.56 |
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Idioma : |
Inglés |
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Notas : |
Article history: November 2, 2009. In: Acta Horticulturae (ISHS) 889: VI International Symposium on Irrigation of Horticultural Crops. Editors: S. Ortega-Farias, G. Selles.
Location: Viña del Mar (Chile). Begin date: November 2, 2009. End date: November 6, 2009. |
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Contenido : |
ABSTRACT.
The potato crop (Solanum tuberosum L.) is of great importance in the Uruguay economy, being the major vegetable in volume of trade. Uruguay imports some amount of potato seed annually. The National Institute of Agricultural Research (INIA) has been engaged for the last decades to obtain cultivars more adapted to country agroecological conditions, easier to multiply locally for replacing imported seed cultivars such as 'Chieftain'. In this sense, promising cultivars including 'INIA-Iporá' were developed. The objective of this work was to study the morpho-physiological and yield modifications of two potato cultivars ('Chieftain' and 'INIA-Iporá') under different irrigation managements. The experiment was carried out during 2006 and 2007 growing seasons under a rainout shelter, at the Experimental Station INIA Las Brujas, in Uruguay. These two varieties were studied under two irrigation managements: (i) irrigated treatment (2003/04 rainfall + irrigation according to daily crop ETc) and; (ii) deficit irrigated treatment (2003/04 rainfall + one irrigation of 25 mm when the accumulated maximum daily crop evapotranspiration reached 90 mm). The maximum daily crop evapotranspiration was estimated using the FAO Penman-Monteith equation. The experimental design was a completely randomized split plot. The leaf area index, the total plant photosynthesis and the crop yield better responded to the irrigation regime. The two potato cultivars showed differences in length of growing season, leaf area, number of mainstems, plant height and plant transpiration rates. The yield components were modified by the irrigation managements, and differences in commercial yield and total number of plant tubers were observed between the 'Chieftain' and 'INIA-Iporá' cultivars. MenosABSTRACT.
The potato crop (Solanum tuberosum L.) is of great importance in the Uruguay economy, being the major vegetable in volume of trade. Uruguay imports some amount of potato seed annually. The National Institute of Agricultural Research (INIA) has been engaged for the last decades to obtain cultivars more adapted to country agroecological conditions, easier to multiply locally for replacing imported seed cultivars such as 'Chieftain'. In this sense, promising cultivars including 'INIA-Iporá' were developed. The objective of this work was to study the morpho-physiological and yield modifications of two potato cultivars ('Chieftain' and 'INIA-Iporá') under different irrigation managements. The experiment was carried out during 2006 and 2007 growing seasons under a rainout shelter, at the Experimental Station INIA Las Brujas, in Uruguay. These two varieties were studied under two irrigation managements: (i) irrigated treatment (2003/04 rainfall + irrigation according to daily crop ETc) and; (ii) deficit irrigated treatment (2003/04 rainfall + one irrigation of 25 mm when the accumulated maximum daily crop evapotranspiration reached 90 mm). The maximum daily crop evapotranspiration was estimated using the FAO Penman-Monteith equation. The experimental design was a completely randomized split plot. The leaf area index, the total plant photosynthesis and the crop yield better responded to the irrigation regime. The two potato cultivars showed differences in length of growin... Presentar Todo |
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Palabras claves : |
SOLANUM TUBEROSUM. |
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Thesagro : |
EVAPOTRANSPIRACIÓN; PAPA. |
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Asunto categoría : |
F01 Cultivo |
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Marc : |
LEADER 02719naa a2200229 a 4500
001 1051112
005 2020-02-10
008 2011 bl uuuu u00u1 u #d
022 $a0567-7572
024 7 $a10.17660/ActaHortic.2011.889.56$2DOI
100 1 $aCASANOVA, S.
245 $aMorpho-physiological and yield modifications in two potato cultivars under different irrigation managements.$h[electronic resource]
260 $c2011
500 $aArticle history: November 2, 2009. In: Acta Horticulturae (ISHS) 889: VI International Symposium on Irrigation of Horticultural Crops. Editors: S. Ortega-Farias, G. Selles. Location: Viña del Mar (Chile). Begin date: November 2, 2009. End date: November 6, 2009.
520 $aABSTRACT. The potato crop (Solanum tuberosum L.) is of great importance in the Uruguay economy, being the major vegetable in volume of trade. Uruguay imports some amount of potato seed annually. The National Institute of Agricultural Research (INIA) has been engaged for the last decades to obtain cultivars more adapted to country agroecological conditions, easier to multiply locally for replacing imported seed cultivars such as 'Chieftain'. In this sense, promising cultivars including 'INIA-Iporá' were developed. The objective of this work was to study the morpho-physiological and yield modifications of two potato cultivars ('Chieftain' and 'INIA-Iporá') under different irrigation managements. The experiment was carried out during 2006 and 2007 growing seasons under a rainout shelter, at the Experimental Station INIA Las Brujas, in Uruguay. These two varieties were studied under two irrigation managements: (i) irrigated treatment (2003/04 rainfall + irrigation according to daily crop ETc) and; (ii) deficit irrigated treatment (2003/04 rainfall + one irrigation of 25 mm when the accumulated maximum daily crop evapotranspiration reached 90 mm). The maximum daily crop evapotranspiration was estimated using the FAO Penman-Monteith equation. The experimental design was a completely randomized split plot. The leaf area index, the total plant photosynthesis and the crop yield better responded to the irrigation regime. The two potato cultivars showed differences in length of growing season, leaf area, number of mainstems, plant height and plant transpiration rates. The yield components were modified by the irrigation managements, and differences in commercial yield and total number of plant tubers were observed between the 'Chieftain' and 'INIA-Iporá' cultivars.
650 $aEVAPOTRANSPIRACIÓN
650 $aPAPA
653 $aSOLANUM TUBEROSUM
700 1 $aGARCIA, C.
700 1 $aVILARO, F.
700 1 $aCARLESSO, R.
773 $tActa Horticulturae, 2011, no.889, p.445-452.
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