A fungal endophyte of a palatable grass affects preference of large herbivores

A fungal endophyte of a palatable grass affects preference of large herbivores

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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.

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Main Authors: Hernández Agramonte, Ignacio, Semmartin, María, Omacini, Marina, Durante, Martín, Gundel, Pedro Emilio, De Battista, Juan José
Format: Texto biblioteca
Language:eng
Subjects:EPICHLOË, FUNGAL ENDOPHYTES, HERBIVORE PREFERENCE, LOLIUM MULTIFLORUM, NEOTYPHODIUM, RYEGRASS,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45814
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id KOHA-OAI-AGRO:45814
record_format koha
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic EPICHLOË
FUNGAL ENDOPHYTES
HERBIVORE PREFERENCE
LOLIUM MULTIFLORUM
NEOTYPHODIUM
RYEGRASS
EPICHLOË
FUNGAL ENDOPHYTES
HERBIVORE PREFERENCE
LOLIUM MULTIFLORUM
NEOTYPHODIUM
RYEGRASS
spellingShingle EPICHLOË
FUNGAL ENDOPHYTES
HERBIVORE PREFERENCE
LOLIUM MULTIFLORUM
NEOTYPHODIUM
RYEGRASS
EPICHLOË
FUNGAL ENDOPHYTES
HERBIVORE PREFERENCE
LOLIUM MULTIFLORUM
NEOTYPHODIUM
RYEGRASS
Hernández Agramonte, Ignacio
Semmartin, María
Omacini, Marina
Durante, Martín
Gundel, Pedro Emilio
De Battista, Juan José
A fungal endophyte of a palatable grass affects preference of large herbivores
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 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.
format Texto
topic_facet EPICHLOË
FUNGAL ENDOPHYTES
HERBIVORE PREFERENCE
LOLIUM MULTIFLORUM
NEOTYPHODIUM
RYEGRASS
author Hernández Agramonte, Ignacio
Semmartin, María
Omacini, Marina
Durante, Martín
Gundel, Pedro Emilio
De Battista, Juan José
author_facet Hernández Agramonte, Ignacio
Semmartin, María
Omacini, Marina
Durante, Martín
Gundel, Pedro Emilio
De Battista, Juan José
author_sort Hernández Agramonte, Ignacio
title 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_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_sort fungal endophyte of a palatable grass affects preference of large herbivores
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45814
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spelling KOHA-OAI-AGRO:458142022-11-03T17:06:53Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=45814http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGA fungal endophyte of a palatable grass affects preference of large herbivoresHernández Agramonte, IgnacioSemmartin, MaríaOmacini, MarinaDurante, MartínGundel, Pedro EmilioDe Battista, Juan Josétextengapplication/pdfTemperate 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.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.EPICHLOËFUNGAL ENDOPHYTESHERBIVORE PREFERENCELOLIUM MULTIFLORUMNEOTYPHODIUMRYEGRASSAustral ecology : a journal of ecology in the southern hemisphere

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