Determinación del patotipo de Verticillium dahliae de aislados de olivares de la provincia de Jaén
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2014-09-15
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Jaén: Universidad de Jaén
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[ES]La extensión y gravedad de la infección por Verticillium dahliae (verticilosis)
hacen necesarias investigaciones que puedan paliar su incidencia tanto sobre el olivo
como sobre otros cultivos de importante valor económico. En esa línea, nuestro
trabajo ha consistido en la siembra de tres variedades de girasol y una de algodón, a
las que se han inoculado distintos aislados de V. dahliae para estudiar el desarrollo
de la infección. En el estudio, con una evaluación periódica de las plantas, se han
cuantificado la incidencia, la severidad, el Área Bajo la Curva de Progreso de la Enfermedad,
el número de plantas muertas y lo que tardaron en morir, y los parámetros
de crecimiento. El objetivo ha sido establecer un modelo de desarrollo de la enfermedad
para determinar la resistencia a los patotipos defoliantes y no defoliantes en
otras especies vegetales diferentes del olivo. Los síntomas de la enfermedad fueron
iguales en todas las plantas, pero sólo en el algodón, que fue el menos resistente a
la enfermedad, pudo apreciarse el carácter más virulento de los patotipos defoliantes.
El girasol, en cambio, se mostró más resistente frente a la verticilosis y en ninguna
de las variedades pudo diferenciarse mayor virulencia en relación a los patotipos
defoliantes y no defoliantes.
[EN]The extension and severity of infection by Verticillium dahliae (verticillium wilt) makes some necessary researches that may mitigate its impact both on the Olive tree and on other crops with an important economical value. In this way, our work has consisted of the sowing of three different sunflower's varieties and one cotton's variety which have been inoculated with different isolates of V. dahliae in order to study the development of the infection. In the study, with a periodical evaluation of the plants, the incidence, the severity, the area under the disease progress curve, the number of dead plants, its life expectances and the parameters of growth have been quantified. The aim has been to set out a development model of the disease in order to determine the resistance to the defoliating and non-defoliating pathotypes in other vegetable species different from the olive tree. The disease symptoms were the same in all the plants, but only in the cotton, which was the less resistant to the disease, the most virulent character of the defoliant patotipos could be estimated. On the other hand, the sunflower was more resistant to verticilosis and in none of the varieties the major virulence could be differentiated in relation to the defoliating and non-defoliating pathotypes.
[EN]The extension and severity of infection by Verticillium dahliae (verticillium wilt) makes some necessary researches that may mitigate its impact both on the Olive tree and on other crops with an important economical value. In this way, our work has consisted of the sowing of three different sunflower's varieties and one cotton's variety which have been inoculated with different isolates of V. dahliae in order to study the development of the infection. In the study, with a periodical evaluation of the plants, the incidence, the severity, the area under the disease progress curve, the number of dead plants, its life expectances and the parameters of growth have been quantified. The aim has been to set out a development model of the disease in order to determine the resistance to the defoliating and non-defoliating pathotypes in other vegetable species different from the olive tree. The disease symptoms were the same in all the plants, but only in the cotton, which was the less resistant to the disease, the most virulent character of the defoliant patotipos could be estimated. On the other hand, the sunflower was more resistant to verticilosis and in none of the varieties the major virulence could be differentiated in relation to the defoliating and non-defoliating pathotypes.
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Biología