A fungal endophyte of a palatable grass affects preference of large herbivores
Temperate grasses frequently acquire resistance to herbivores through a symbiosis with epichloid fungi that produces alkaloids of variable deterrent effects. However, in those cases without apparent endophyte negative effects on domestic herbivores, it is not clear whether plant consumption or prefe...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | https://onlinelibrary.wiley.com/doi/full/10.1111/aec.12554 http://hdl.handle.net/20.500.12123/2603 https://doi.org/10.1111/aec.12554 |
| _version_ | 1855483085184827392 |
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| author | Hernández Agramonte, Ignacio M. Semmartin, María Gisela Omacini, Marina Durante, Martin Gundel, Pedro Emilio De Battista, Jose Pedro |
| author_browse | De Battista, Jose Pedro Durante, Martin Gundel, Pedro Emilio Hernández Agramonte, Ignacio M. Omacini, Marina Semmartin, María Gisela |
| author_facet | Hernández Agramonte, Ignacio M. Semmartin, María Gisela Omacini, Marina Durante, Martin Gundel, Pedro Emilio De Battista, Jose Pedro |
| author_sort | Hernández Agramonte, Ignacio M. |
| collection | INTA Digital |
| description | Temperate grasses frequently acquire resistance to herbivores through a symbiosis with epichloid fungi that produces alkaloids of variable deterrent effects. However, in those cases without apparent endophyte negative effects on domestic herbivores, it is not clear whether plant consumption or preference is affected or not. We performed three experiments with 1‐year‐old steers (Bos taurus, Aberdeen Angus) and the annual grass Lolium multiflorum, infected or not by Epichloë occultans to evaluate preference and to identify the underlying tolerance mechanisms. The first experiment evaluated steer preference for L. multiflorum cultivated in plots with three endophyte infection frequencies (low, medium and high), and investigated the role of canopy structure and plant nutritional traits on preference. The second experiment evaluated preference for chopped grass, offered in individual trays with contrasting infection frequencies (low and high), to discard possible effects associated with canopy structure and to focus on nutritional traits. The third experiment was performed with a tray + basket design that separated visual and olfactory stimuli from nutritional traits. High endophyte infection frequencies reduced consistently animal preference, even after short (~10 min) feeding events. However, we did not find significant evidence of plant structural, nutritional, visual or olfactory traits. Our results discarded several potential mechanisms; therefore, the dissuasive effect of fungal endophytes on animal consumption might be related to other mechanisms, including, likely, alkaloids and changes on grass metabolome. |
| format | Artículo |
| id | INTA2603 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA26032018-06-12T15:56:27Z A fungal endophyte of a palatable grass affects preference of large herbivores Hernández Agramonte, Ignacio M. Semmartin, María Gisela Omacini, Marina Durante, Martin Gundel, Pedro Emilio De Battista, Jose Pedro Gramineas Lolium Multiflorum Endófitas Hongos Herbívoros Grasses Endophytes Fungi Herbivores Temperate grasses frequently acquire resistance to herbivores through a symbiosis with epichloid fungi that produces alkaloids of variable deterrent effects. However, in those cases without apparent endophyte negative effects on domestic herbivores, it is not clear whether plant consumption or preference is affected or not. We performed three experiments with 1‐year‐old steers (Bos taurus, Aberdeen Angus) and the annual grass Lolium multiflorum, infected or not by Epichloë occultans to evaluate preference and to identify the underlying tolerance mechanisms. The first experiment evaluated steer preference for L. multiflorum cultivated in plots with three endophyte infection frequencies (low, medium and high), and investigated the role of canopy structure and plant nutritional traits on preference. The second experiment evaluated preference for chopped grass, offered in individual trays with contrasting infection frequencies (low and high), to discard possible effects associated with canopy structure and to focus on nutritional traits. The third experiment was performed with a tray + basket design that separated visual and olfactory stimuli from nutritional traits. High endophyte infection frequencies reduced consistently animal preference, even after short (~10 min) feeding events. However, we did not find significant evidence of plant structural, nutritional, visual or olfactory traits. Our results discarded several potential mechanisms; therefore, the dissuasive effect of fungal endophytes on animal consumption might be related to other mechanisms, including, likely, alkaloids and changes on grass metabolome. EEA Concepción del Uruguay Fil: Hernández Agramonte, Ignacio M. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Semmartin, María Gisela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Omacini, Marina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Durante, Martin. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; Argentina Fil: Gundel, Pedro Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: De Battista, Jose Pedro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concepción del Uruguay; Argentina 2018-06-12T15:08:08Z 2018-06-12T15:08:08Z 2018-04 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://onlinelibrary.wiley.com/doi/full/10.1111/aec.12554 http://hdl.handle.net/20.500.12123/2603 1442-9985 1442-9993 https://doi.org/10.1111/aec.12554 eng info:eu-repo/semantics/restrictedAccess application/pdf Austral Ecology 43 (2) : 172-179 (April 2018) |
| spellingShingle | Gramineas Lolium Multiflorum Endófitas Hongos Herbívoros Grasses Endophytes Fungi Herbivores Hernández Agramonte, Ignacio M. Semmartin, María Gisela Omacini, Marina Durante, Martin Gundel, Pedro Emilio De Battista, Jose Pedro A fungal endophyte of a palatable grass affects preference of large herbivores |
| title | A fungal endophyte of a palatable grass affects preference of large herbivores |
| title_full | A fungal endophyte of a palatable grass affects preference of large herbivores |
| title_fullStr | A fungal endophyte of a palatable grass affects preference of large herbivores |
| title_full_unstemmed | A fungal endophyte of a palatable grass affects preference of large herbivores |
| title_short | A fungal endophyte of a palatable grass affects preference of large herbivores |
| title_sort | fungal endophyte of a palatable grass affects preference of large herbivores |
| topic | Gramineas Lolium Multiflorum Endófitas Hongos Herbívoros Grasses Endophytes Fungi Herbivores |
| url | https://onlinelibrary.wiley.com/doi/full/10.1111/aec.12554 http://hdl.handle.net/20.500.12123/2603 https://doi.org/10.1111/aec.12554 |
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