Trade - off between seed number and weight Influence of a grass - endophyte symbiosis
Plant fitness is enhanced by resource allocation to seed number [offspring number] or weight [offspring survival]. Besides, there is a well known trade-off in resource allocation between both traits. Symbiotic interactions can influence plant resource allocation to reproduction, yet little research...
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2012Gundel3.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
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| 245 | 1 | 0 | |a Trade - off between seed number and weight |b Influence of a grass - endophyte symbiosis |
| 520 | |a Plant fitness is enhanced by resource allocation to seed number [offspring number] or weight [offspring survival]. Besides, there is a well known trade-off in resource allocation between both traits. Symbiotic interactions can influence plant resource allocation to reproduction, yet little research has been performed in this direction. We studied the consequences of a grass-fungus symbiosis on the trade-off between seed number and weight, using Lolium multiflorum and the endophyte Neotyphodium occultans as our study system. In ecological terms, we experimentally removed N. occultans from L. multiflorum plants, and compared reproductive allocation to seed number and weight in endophyte-symbiotic vs. non-symbiotic plants at different levels of nutrient availability [small pots vs. large pots]. In evolutionary terms, we compared reproductive allocation between symbiotic vs. non-symbiotic plants for different host genotypes. All plants showed a negative association between seed number and weight, once standardized for total reproductive biomass. Under high nutrient availability, endophyte-symbiotic plants showed higher seed weight than non-symbiotic plants for any seed number. However, no differences were observed under low nutrient availability. Endophyte influence also varied according to L. multiflorum genotype; specifically, endophyte-symbiotic plants showed a lower slope in the relationship between seed number and weight than non-symbiotic plants for the 'Marshall' genotype but no endophyte influence was found for the "Pampean" genotype. The results implied a higher plasticity in seed weight and lower plasticity in seed number for symbiotic plants. Indeed, endophyte-symbiotic plants showed an overall lower slope in the association between seed number and total reproductive biomass than non-symbiotic plants. Our results suggest that N. occultans induces heavier seeds in L. multiflorum plants under environmental conditions favorable to plant growth or for certain plant genotypes. We propose that symbiotic interactions may influence the evolution of seed number and weight trade-off. | ||
| 653 | 0 | |a ALLOMETRIC RELATIONSHIPS | |
| 653 | 0 | |a GRASS-ENDOPHYTE INTERACTION | |
| 653 | 0 | |a MUTUALISM | |
| 653 | 0 | |a PLANT-MICROBE INTERACTIONS | |
| 653 | 0 | |a SYMBIOSIS | |
| 653 | 0 | |a FUNGI | |
| 653 | 0 | |a LOLIUM | |
| 653 | 0 | |a LOLIUM MULTIFLORUM | |
| 653 | 0 | |a NEOTYPHODIUM | |
| 653 | 0 | |a NEOTYPHODIUM OCCULTANS | |
| 700 | 1 | |9 28667 |a Gundel, Pedro Emilio | |
| 700 | 1 | |9 31177 |a Garibaldi, Lucas Alejandro | |
| 700 | 1 | |9 7113 |a Martínez Ghersa, María Alejandra | |
| 700 | 1 | |9 7549 |a Ghersa, Claudio Marco | |
| 773 | |t Basic and Applied Ecology |g Vol.13, no.1 (2012), p.32-39 | ||
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| 900 | |a ^tTrade-off between seed number and weight^sInfluence of a grass-endophyte symbiosis | ||
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| 900 | |a ^aMartínez Ghersa^bM. A. | ||
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| 900 | |a ^aGundel, P.E.^tIFEVA-Facultad de Agronomía [UBA]/CONICET, Cátedra de Ecología, Facultad de Agronomía [UBA], Av. San Martín 4453, [C1417DSE] Buenos Aires, Argentina | ||
| 900 | |a ^aGaribaldi, L.A.^tDepartamento de Métodos Cuantitativos y Sistemas de información, Facultad de Agronomía [UBA], Av. San Martín 4453, [C1417DSE] Buenos Aires, Argentina | ||
| 900 | |a ^aMartínez-Ghersa, M.A.^tMTT Agrifood Research Finland, Plant protection, 31600 Jokioinen, Finland | ||
| 900 | |a ^aGhersa, C.M.^tLaboratorio Ecotono, INIBIOMA-CONICET and CRUB-UNCOMA, Quintral 1250, [8400] San Carlos de Bariloche, Río Negro, Argentina | ||
| 900 | |a ^tSede Andina, Universidad Nacional de Río Negro, Villegas 147, [8400] San Carlos de Bariloche, Río Negro, Argentina | ||
| 900 | |a ^tBasic and Applied Ecology^cBasic Appl. Ecol. | ||
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| 900 | |a Vol. 13, no. 1 | ||
| 900 | |a 39 | ||
| 900 | |a ALLOMETRIC RELATIONSHIPS | ||
| 900 | |a GRASS-ENDOPHYTE INTERACTION | ||
| 900 | |a MUTUALISM | ||
| 900 | |a PLANT-MICROBE INTERACTIONS | ||
| 900 | |a SYMBIOSIS | ||
| 900 | |a FUNGI | ||
| 900 | |a LOLIUM | ||
| 900 | |a LOLIUM MULTIFLORUM | ||
| 900 | |a NEOTYPHODIUM | ||
| 900 | |a NEOTYPHODIUM OCCULTANS | ||
| 900 | |a Plant fitness is enhanced by resource allocation to seed number [offspring number] or weight [offspring survival]. Besides, there is a well known trade-off in resource allocation between both traits. Symbiotic interactions can influence plant resource allocation to reproduction, yet little research has been performed in this direction. We studied the consequences of a grass-fungus symbiosis on the trade-off between seed number and weight, using Lolium multiflorum and the endophyte Neotyphodium occultans as our study system. In ecological terms, we experimentally removed N. occultans from L. multiflorum plants, and compared reproductive allocation to seed number and weight in endophyte-symbiotic vs. non-symbiotic plants at different levels of nutrient availability [small pots vs. large pots]. In evolutionary terms, we compared reproductive allocation between symbiotic vs. non-symbiotic plants for different host genotypes. All plants showed a negative association between seed number and weight, once standardized for total reproductive biomass. Under high nutrient availability, endophyte-symbiotic plants showed higher seed weight than non-symbiotic plants for any seed number. However, no differences were observed under low nutrient availability. Endophyte influence also varied according to L. multiflorum genotype; specifically, endophyte-symbiotic plants showed a lower slope in the relationship between seed number and weight than non-symbiotic plants for the 'Marshall' genotype but no endophyte influence was found for the "Pampean" genotype. The results implied a higher plasticity in seed weight and lower plasticity in seed number for symbiotic plants. Indeed, endophyte-symbiotic plants showed an overall lower slope in the association between seed number and total reproductive biomass than non-symbiotic plants. Our results suggest that N. occultans induces heavier seeds in L. multiflorum plants under environmental conditions favorable to plant growth or for certain plant genotypes. We propose that symbiotic interactions may influence the evolution of seed number and weight trade-off. | ||
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