Susceptibilidad de las semillas y brotes de aliso común (Alnus glutinosa) a Phytophthora alni y otras especies del género Phytophthora
Resumen
Phytophthora alni es un patógeno muy destructivo de los alisos (Alnus spp.) que se está expandiendo por toda Europa. Recientemente este patógeno ha sido citado como causante de enfermedades del aliso común (Alnus glutinosa) en España. Semillas y plántulas de A. glutinosa fueron analizadas in vitro para ver su susceptibilidad a Phytophthora alni y otras especies del género Phytophthora. En el experimento se usaron aislamientos de P. alni ssp. alni, P. cinnamomi, P. citrophthora, P. nicotianae y P. palmivora. Las semillas fueron inoculadas con una suspension de zoosporas mientras que las plántulas fueron inoculadas con bloques uniformes de micelio de agar de las especies de Phytophthora utilizadas. La susceptibilidad fue calculada evaluando la germinación de las semillas y la mortalidad de las plántulas después de 42 y 67 días tras la inoculación respectivamente. Los ratios de germinación de las semillas y de mortalidad de las plántulas variaron significativamente entre los aislamientos utilizados. Los resultados demostraron que el aliso común y sus semillas y plántulas tienen riesgo de ser infectados por P. alni. Además, otras especies de Phytophthora fueron capaces de infectar, lo que evidenció una relativa falta de especificidad por el hospedante. Estos datos son importantes por su transcendencia para la regenaración del aliso en las áreas infectadas, y la dispersión de la enfermedad en este material vegetal.Descargas
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