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| Título: | Symbiotic interactions as drivers of trade-offs in plants: effects of fungal endophytes on tall fescue |
| Autor(es): | Gundel, Pedro E. Garibaldi, Lucas Alejandro Helander, Marjo Saikkonen, Kari |
| Fecha de publicación: | 24-mar-2013 |
| Editorial: | Springer |
| Citación: | Gundel, Pedro E., Garibaldi, Lucas A., Helander, Marjo y Saikkonen, Kari. (2013). Symbiotic interactions as drivers of trade-offs in plants: effects of fungal endophytes on tall fescue. Springer; Fungal Diversity; 60 (1); 5-14 |
| Revista: | Fungal Diversity |
| Resumen: | Studying the controls on biomass allocation trade-offs in plants are important since they affect harvestable product yields and are critical to understanding symbiotic interactions. Epichloae fungal endophytes associate with cool-season grasses, growing systemically within the plant inter-cellular spaces and are transmitted through seeds. We explore the endophytes influence on the relationship between the plant reproductive and vegetative aboveground biomass (reproductive effort: RE) and on the trade-off between two components of the reproductive biomass, number and weight of panicles (RPN), using tall fescue as a model system. Naturally endophyte-colonized, manipulatively endophyte-free, and naturally endophyte-free plants from Northern European wild-populations together with the cultivar Kentucky-31 were grown under different environmental conditions (nutrients x water). The endophyte had an effect on the RPN (E+: 6.19, ME-: 4.68 and E-: 4.40) which indicates how reproductive biomass is partitioned into number and mass of panicles, but not on RE (≈0.06). As expected, wild plants showed higher reproductive effort (≈0.06) compared to the cultivar KY-31 (0.05), irrespective of endophyte presence. Endophyte-colonized plants had lighter panicles than endophyte-free plants, a pattern that was clear among low-yielding plants. Similarly, the trade-off between RPN and RE was higher for endophyte-colonized plants. This was again evident among plants with low RE indicating that colonized plants split the yield into either greater number of panicles and/or lighter panicles. The effect of vertically transmitted endophytes has earlier been studied as ratios (e.g. RE); however, our study shows that this approach may hide size-dependent endophyte effects on these relationships. Our study reveals that Neotyphodium endophyte affects trade-offs in tall fescue plants in a complex manner, and is influenced by a number of biological and abiotic factors. |
| URI: | http://hdl.handle.net/11336/4275 http://link.springer.com/article/10.1007%2Fs13225-013-0224-y https://rid.unrn.edu.ar/jspui/handle/20.500.12049/3456 |
| Identificador DOI: | http://dx.doi.org/10.1007/s13225-013-0224-y |
| ISSN: | 1560-2745 |
| Aparece en las colecciones: | Artículos |
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| Archivo | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Gundel (2013) Symbiotic interactions as drivers of trade-offs in plants - effects of fungal endophytes on tall fescue.pdf | 343,62 kB | Adobe PDF | Visualizar/Abrir |
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