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...
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Formato: | Artículo |
Lenguaje: | Inglés |
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Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2018hernandezagramonte.pdf LINK AL EDITOR |
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024 | |a 10.1111/aec.12554 | ||
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245 | 1 | 0 | |a A fungal endophyte of a palatable grass affects preference of large herbivores |
520 | |a 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 plus sign basket design that separated visual and olfactory stimuli from nutritional traits. High endophyte infection frequencies reduced consistently animal preference, even after short ( approximately 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. | ||
653 | |a EPICHLOË | ||
653 | |a FUNGAL ENDOPHYTES | ||
653 | |a HERBIVORE PREFERENCE | ||
653 | |a LOLIUM MULTIFLORUM | ||
653 | |a NEOTYPHODIUM | ||
653 | |a RYEGRASS | ||
700 | 1 | |9 38543 |a Hernández Agramonte, Ignacio |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
700 | 1 | |9 7454 |a Semmartin, María |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
700 | 1 | |9 6464 |a Omacini, Marina |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
700 | 1 | |9 26775 |a Durante, Martín |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Entre Ríos. Estación Experimental Agropecuaria Concepción del Uruguay (EEA Concepción del Uruguay). Entre Ríos, Argentina. | |
700 | 1 | |9 28667 |a Gundel, Pedro Emilio |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. | |
700 | 1 | |a De Battista, Juan José |u Instituto Nacional de Tecnología Agropecuaria (INTA). Centro Regional Entre Ríos. Estación Experimental Agropecuaria Concepción del Uruguay (EEA Concepción del Uruguay). Entre Ríos, Argentina. |9 38828 | |
773 | 0 | |t Austral ecology : a journal of ecology in the southern hemisphere |w (AR-BaUFA)SECS000968 |g Vol.43, no.2 (2018), p.172-179, grafs., tbls. | |
856 | |f 2018hernandezagramonte |i En reservorio |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2018hernandezagramonte.pdf |x ARTI201808 | ||
856 | |u https://www.wiley.com |z LINK AL EDITOR | ||
942 | |c ARTICULO | ||
942 | |c ENLINEA | ||
976 | |a AAG |