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Advisor(s)
Abstract(s)
El castaño (Castanea sativa) es una especie de gran importancia económica y social en la región del Norte de Portugal.
Uno de los mayores obstáculos en el aumento de la producción de castaña está relacionada con la presencia de factores
bióticos como la antigua y conocida enfermedad de la Tinta y más recientemente con el chancro que provoca elevada mortalidad en los castaños. No hay sustancias químicas capaces de bloquear el desarrollo del chancro del castaño y todos los medios de lucha cultural mostraron baja eficacia. La hipovirulencia es el medio de lucha biológica y la manera más ventajosa para parar la enfermedad en Europa. El método mostro una elevada capacidad de cura en los chancros y la recuperación completa de los castaños atacados. El mecanismo molecular de hipovirulencia está asociado a la presencia en el hongo parasítico del virus dsRNA denominado Hypovirus (CHV). En Sergude (Minho) en una parcela con todos los árboles atacados por C. parasitica se verifico en un periodo de 3 – 4 años la remisión natural de los chancros llevando a la recuperación de los árboles enfermos. Conocer los mecanismos implicados en la expresión de la hipovirulencia y los factores asociados a su dispersión natural fue el objeto de este trabajo. Se estudió la estructura poblacional de C. parasitica presente en la parcela así como la micoflora epifítica y endofítica asociada.
Chestnut (Castanea sativa) is a species of great economic and social importance in the Northern region of Portugal. One of the biggest barriers to increased nut production is related to the presence of biotic factors such as the old and familiar Ink Disease and more recently the Chestnut Blight that is causing high mortality in chestnut. In the absence of chemical fungicides capable of stopping the development of the Chestnut Blight and considering the reduced effectiveness of other mitigation measures, hypovirulence is the most advantageous way to control the disease in Europe. The method showed high ability to heal the cankers and promote the complete recovery of chestnut. The molecular mechanism of hypovirulence is associated with the presence of dsRNA virus of the genus Hypovirus. In Sergude (Minho) in a chestnut grove with all trees attacked by C. parasitica in a period of 3-4 years occurred the natural remission of cankers leading to the recovery of diseased trees. Our objective was to understand the mechanisms involved in the expression of hypovirulence and factors associated with its natural dispersion . We studied the population structure of C. parasitica present in chestnut and associated epiphytic and endophytic mycoflora
Chestnut (Castanea sativa) is a species of great economic and social importance in the Northern region of Portugal. One of the biggest barriers to increased nut production is related to the presence of biotic factors such as the old and familiar Ink Disease and more recently the Chestnut Blight that is causing high mortality in chestnut. In the absence of chemical fungicides capable of stopping the development of the Chestnut Blight and considering the reduced effectiveness of other mitigation measures, hypovirulence is the most advantageous way to control the disease in Europe. The method showed high ability to heal the cankers and promote the complete recovery of chestnut. The molecular mechanism of hypovirulence is associated with the presence of dsRNA virus of the genus Hypovirus. In Sergude (Minho) in a chestnut grove with all trees attacked by C. parasitica in a period of 3-4 years occurred the natural remission of cankers leading to the recovery of diseased trees. Our objective was to understand the mechanisms involved in the expression of hypovirulence and factors associated with its natural dispersion . We studied the population structure of C. parasitica present in chestnut and associated epiphytic and endophytic mycoflora
Description
Keywords
Chancro del castaño C. parasitica Micoflora epifítica y endofítica Dispersión natural de la hipvirulencia
Citation
Ibáñez, Isabel; Pereira, Eric; Luísa, Moura; Castro, João; Gouveia, Eugénia (2015). Dispersión natural de la Hipovirulencia en Cryphonectria parasitica. Un caso de estudio, Sergude – Minho – Portugal = Natural spread of Hypovirulence in Cryphonectria parasitica. A case study, Sergude - Minho – Portugal. Revista de Ciências Agrárias. ISSN 0871-018X. 38:2, p. 266-274