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handle: 10261/266621
[ES] El hongo Neotyphodium coenophialum infecta plantas de Festuca arundinacea sin que éstas muestren síntomas durante su ciclo de vida. Este hongo de ciclo endofítico se transmite verticalmente por semilla. Las plantas infectadas contienen alcaloides tóxicos para herbívoros y bajo determinadas condiciones climáticas, el consumo de F. arundinacea infectada por N. coenophialum puede causar trastornos en ganado vacuno y equino. Para determinar la presencia de N. coenophialum en variedades forrajeras comerciales de F. arundinacea se analizaron semillas de trece variedades. Se detectaron niveles de infección del 17 al 72 p. 100 en cuatro de las variedades analizadas. Dado que N. coenophialum sólo se transmite por semilla, estos resultados indican que la semilla de estas variedades ha sido producida por plantas infectadas.
[EN] The fungus Neotyphodium coenophialum infects tall fescue (Festuca arundinacea) plants. During their life cycle the infected plants do not show any obvious sign of infection. This endophytic fungus in vertically transmitted by seed, and infected plants contain alkaloids which are toxic to herbivores. The comsumption of infected tall fescue by cattle and horses is associated to fescue toxicosis. In order to determine if N. coenophialum was present in seeds of forage cultivars of tall fescue, 13 cultivars were analyzed. Neotyphodium mycelium was detected in seeds of four cultivars. The levels of infection in these cultivars ranged from 17 to 72 p. 100 of the seeds. These results indicate that the seed of these cultivars was likely produced by infected plants.
Este trabajo ha sido financiado por el proyecto CICYT AGF96-0423 y una beca post-doctoral INIA.
Hongos endofíticos, Festuca arundinacea, Neotyphodium coenophialum, Semillas, Acremonium coenophialum
Hongos endofíticos, Festuca arundinacea, Neotyphodium coenophialum, Semillas, Acremonium coenophialum
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