Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala
Schedonorus arundinaceus (tall fescue) population can be infected by the endophyte fungus Epichloë coenophiala, responsible of livestock intoxication due to fungal alkaloids (i.e., ergovaline). The effects of ergovaline in pastures can be attenuated through dilution; this is, to interseed infected...
| Autores principales: | , , , , , |
|---|---|
| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Asociación Argentina de Ecología
2020
|
| Materias: | |
| Acceso en línea: | http://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/944/429 http://hdl.handle.net/20.500.12123/7101 |
| _version_ | 1855035796990459904 |
|---|---|
| author | Petigrosso, Lucas R García, Matías Vignolio, Osvaldo Salvat, Adriana Elisabeth Cristos, Diego Sebastian Castaño, Jorge Alberto |
| author_browse | Castaño, Jorge Alberto Cristos, Diego Sebastian García, Matías Petigrosso, Lucas R Salvat, Adriana Elisabeth Vignolio, Osvaldo |
| author_facet | Petigrosso, Lucas R García, Matías Vignolio, Osvaldo Salvat, Adriana Elisabeth Cristos, Diego Sebastian Castaño, Jorge Alberto |
| author_sort | Petigrosso, Lucas R |
| collection | INTA Digital |
| description | Schedonorus arundinaceus (tall fescue) population can be infected by the endophyte fungus Epichloë
coenophiala, responsible of livestock intoxication due to fungal alkaloids (i.e., ergovaline). The effects of ergovaline
in pastures can be attenuated through dilution; this is, to interseed infected tall fescue (E+) with legumes,
endophyte-free grass, or with both. Plant interaction and ergovaline concentration in mixture of tall fescue
(E+) and Lotus tenuis, a forage legume, were investigated in replacement series experiments under defoliation
conditions. The interaction between species was analysed through relative yield total (RYT) of the forage
biomass, aggressivity index (AI), plant cover and ergovaline concentration. The work was performed in field
conditions. Six cuttings were applied during the experimental period. Plant monocultures of each species were
at a constant density of 80 pl/m2
, while mixtures ratios were 20:60, 40:40 and 60:20 pl/m² of L. tenuis and tall
fescue, respectively. Mortality of L. tenuis and tall fescue plants was not observed. Tall fescues yield and plant
cover, in monoculture and in mixture, were higher than in L. tenuis. RYT was higher than 1 for all mixtures.
According to AI, in mixture, tall fescue was the dominant species and overcompensated the lower yield of L.
tenuis. At the early Autumn, ergovaline concentration in monoculture was 1.637±0.594 ng/g, and in the 40:40
mixture was 0.407±0.109 ng/g. Forage production was higher in mixtures than in monocultures, and L. tenuis
contributed to reduce ergovaline concentration. According to the results, 40:40 pl/m2
of tall fescue and L. tenuis
was the best species combination. A positive effect of L. tenuis on growth of tall fescue mediated by nitrogen
availability could have allowed the plant coexistence. Future experiments should analyse the variation of
alkaloid concentration and forage production in tall fescue pastures, according to L. tenuis proportion, defoliation
frequency and intensity under different seasons. |
| format | info:ar-repo/semantics/artículo |
| id | INTA7101 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Asociación Argentina de Ecología |
| publisherStr | Asociación Argentina de Ecología |
| record_format | dspace |
| spelling | INTA71012020-04-17T11:56:44Z Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala Petigrosso, Lucas R García, Matías Vignolio, Osvaldo Salvat, Adriana Elisabeth Cristos, Diego Sebastian Castaño, Jorge Alberto Gramineas Leguminosas Competición Vegetal Fitotoxicidad Festuca Arundinacea Lotus Tenuis Grasses Legumes Plant Competition Phytotoxicity Replacement Series Series de Reemplazo Schedonorus arundinaceus (tall fescue) population can be infected by the endophyte fungus Epichloë coenophiala, responsible of livestock intoxication due to fungal alkaloids (i.e., ergovaline). The effects of ergovaline in pastures can be attenuated through dilution; this is, to interseed infected tall fescue (E+) with legumes, endophyte-free grass, or with both. Plant interaction and ergovaline concentration in mixture of tall fescue (E+) and Lotus tenuis, a forage legume, were investigated in replacement series experiments under defoliation conditions. The interaction between species was analysed through relative yield total (RYT) of the forage biomass, aggressivity index (AI), plant cover and ergovaline concentration. The work was performed in field conditions. Six cuttings were applied during the experimental period. Plant monocultures of each species were at a constant density of 80 pl/m2 , while mixtures ratios were 20:60, 40:40 and 60:20 pl/m² of L. tenuis and tall fescue, respectively. Mortality of L. tenuis and tall fescue plants was not observed. Tall fescues yield and plant cover, in monoculture and in mixture, were higher than in L. tenuis. RYT was higher than 1 for all mixtures. According to AI, in mixture, tall fescue was the dominant species and overcompensated the lower yield of L. tenuis. At the early Autumn, ergovaline concentration in monoculture was 1.637±0.594 ng/g, and in the 40:40 mixture was 0.407±0.109 ng/g. Forage production was higher in mixtures than in monocultures, and L. tenuis contributed to reduce ergovaline concentration. According to the results, 40:40 pl/m2 of tall fescue and L. tenuis was the best species combination. A positive effect of L. tenuis on growth of tall fescue mediated by nitrogen availability could have allowed the plant coexistence. Future experiments should analyse the variation of alkaloid concentration and forage production in tall fescue pastures, according to L. tenuis proportion, defoliation frequency and intensity under different seasons. Las poblaciones de Schedonorus arundinaceus (festuca alta) pueden ser infectadas por el hongo endófito Epichloë coenophiala, responsable de la intoxicación del ganado por la presencia de alcaloides fúngicos (i.e., ergovalina). Los efectos de la ergovalina en las pasturas pueden ser atenuados mediante dilución; es decir, intersembrar la población de festuca alta infectada (E+) con leguminosas, con gramíneas libres de endófitos o con ambas. En experimentos de series de reemplazo bajo defoliación se estudió la concentración de ergovalina y la interacción de la mezcla de festuca alta (E+) y Lotus tenuis, una leguminosa forrajera. La interacción entre las especies se analizó mediante el rendimiento relativo total (RYT) de la biomasa forrajera, el índice de agresividad (AI), la cobertura vegetal y la concentración de ergovalina. El trabajo se realizó en condiciones de campo y se aplicaron seis cortes durante el período experimental. Los monocultivos de cada especie tenían una densidad constante de 80 pl/m-2, y las proporciones de las mezclas tenían 20:60, 40:40 y 60:20 pl/m2 de L. tenuis y festuca alta, respectivamente. No hubo mortalidad de plantas de L. tenuis ni de festuca alta. Los rendimientos y la cobertura vegetal de festuca alta, en monocultivo y en mezcla, fueron mayores que en L. tenuis. El RYT fue >1 para todas las mezclas. Según el IA, en la mezcla, festuca alta fue la especie dominante y sobrecompensó el menor rendimiento de L. tenuis. A principios del otoño, la concentración de ergovalina en el monocultivo fue de 1.637±0.594 ng/g, y en la mezcla 40:40 fue 0.407±0.109 ng/g. La producción de forraje fue mayor en las mezclas que en los monocultivos y Lotus tenuis contribuyó a reducir la concentración de ergovalina. Según nuestros resultados, la mezcla 40:40 pl/m2 de festuca alta y L. tenuis fue la mejor combinación de especies. Esta coexistencia podría explicarse por un efecto positivo de L. tenuis sobre el crecimiento de festuca alta mediado por la disponibilidad de nitrógeno. Futuros experimentos deberían analizar la variación en la concentración de alcaloides y la producción de forraje en pasturas de festuca alta de acuerdo a la proporción de L. tenuis y la frecuencia e intensidad de defoliación en diferentes estaciones. EEA Balcarce Fil: Petigrosso, Lucas. Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias; Argentina Fil: García, Matías. Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias; Argentina. Fil: Vignolio, Osvaldo. Universidad Nacional de Mar del Plata, Facultad de Ciencias Agrarias; Argentina Fil: Salvat, Adriana Elisabeth. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Patobiología; Argentina. Fil: Cristos, Diego Sebastián. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Investigación Tecnología de los Alimentos; Argentina. Fil: Castaño, Jorge Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina 2020-04-17T11:37:44Z 2020-04-17T11:37:44Z 2020-01-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/944/429 http://hdl.handle.net/20.500.12123/7101 1667-782X 0327-5477 (Online) eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Asociación Argentina de Ecología Ecología Austral 30 :165-174. (Abril 2020) |
| spellingShingle | Gramineas Leguminosas Competición Vegetal Fitotoxicidad Festuca Arundinacea Lotus Tenuis Grasses Legumes Plant Competition Phytotoxicity Replacement Series Series de Reemplazo Petigrosso, Lucas R García, Matías Vignolio, Osvaldo Salvat, Adriana Elisabeth Cristos, Diego Sebastian Castaño, Jorge Alberto Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala |
| title | Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala |
| title_full | Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala |
| title_fullStr | Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala |
| title_full_unstemmed | Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala |
| title_short | Plant interactions and ergovaline concentration in mixture of Lotus tenuis and Schedonorus arundinaceus infected with the fungus Epichloë coenophiala |
| title_sort | plant interactions and ergovaline concentration in mixture of lotus tenuis and schedonorus arundinaceus infected with the fungus epichloe coenophiala |
| topic | Gramineas Leguminosas Competición Vegetal Fitotoxicidad Festuca Arundinacea Lotus Tenuis Grasses Legumes Plant Competition Phytotoxicity Replacement Series Series de Reemplazo |
| url | http://ojs.ecologiaaustral.com.ar/index.php/Ecologia_Austral/article/view/944/429 http://hdl.handle.net/20.500.12123/7101 |
| work_keys_str_mv | AT petigrossolucasr plantinteractionsandergovalineconcentrationinmixtureoflotustenuisandschedonorusarundinaceusinfectedwiththefungusepichloecoenophiala AT garciamatias plantinteractionsandergovalineconcentrationinmixtureoflotustenuisandschedonorusarundinaceusinfectedwiththefungusepichloecoenophiala AT vignolioosvaldo plantinteractionsandergovalineconcentrationinmixtureoflotustenuisandschedonorusarundinaceusinfectedwiththefungusepichloecoenophiala AT salvatadrianaelisabeth plantinteractionsandergovalineconcentrationinmixtureoflotustenuisandschedonorusarundinaceusinfectedwiththefungusepichloecoenophiala AT cristosdiegosebastian plantinteractionsandergovalineconcentrationinmixtureoflotustenuisandschedonorusarundinaceusinfectedwiththefungusepichloecoenophiala AT castanojorgealberto plantinteractionsandergovalineconcentrationinmixtureoflotustenuisandschedonorusarundinaceusinfectedwiththefungusepichloecoenophiala |