Survey of Oomycetes Associated with Root and Crown Rot of Almond in Spain and Pathogenicity of Phytophthora niederhauserii and Phytopythium vexans to ‘Garnem’ Rootstock
Ver/Abrir
Fecha de publicación
2022-02-18ISSN
2077-0472
Resumen
From 2018 to 2020, surveys of oomycetes associated with root and crown rot of almond
(Prunus dulcis) were conducted on diseased young almond trees in commercial orchards and nurseries
in six provinces of Spain. A total of 104 oomycete isolates were obtained from plant and soil samples,
which h were identified by sequencing the internal transcribed spacer (ITS) region of the ribosomal
DNA. Diverse species belonging to the genera Globisporangium, Phytophthora, Phytopythium and
Pythium were found, Phytopythium vexans and Phytophthora niederhauserii being the most frequent. The
pathogenicity of these two species to one-year-old almond seedlings of ‘Garnem’ (P. dulcis × P. persica)
rootstock was studied. All seedlings inoculated with Pp. vexans and Ph. niederhauserii isolates
showed severe symptoms at the late stage of the pathogenicity test (defoliation, wilting and dieback)
and several plants died. Some isolates of Ph. niederhauserii significantly reduced the dry weight of
the roots compared with the control, but this effect was not observed in seedlings inoculated with
Pp. vexans. These results provide new information about the oomycete species present in almond
crops in Spain and highlight the importance of carrying out frequent phytosanitary surveys for a
better knowledge of potential risks posed by these soil-borne pathogens.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
English
Materias (CDU)
633 - Cultivos y producciones
Páginas
15
Publicado por
MDPI
Publicado en
Agriculture
Citación
Beluzán, Francisco, Xavier Miarnau, Laura Torguet, Josep Armengol, and Paloma Abad-Campos. 2022. "Survey Of Oomycetes Associated With Root And Crown Rot Of Almond In Spain And Pathogenicity Of Phytophthora Niederhauserii And Phytopythium Vexans To ‘Garnem’ Rootstock". Agriculture 12 (2): 294. doi:10.3390/agriculture12020294.
Número del acuerdo de la subvención
INIA-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2017-00009-C04-01/ES/Estrategias de control de enfermedades fúngicas del almendro basadas en la epidemiología, en la genética de la resistencia y en las prácticas de cultivo/
INIA-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/RTA2017-00009-C04-04/ES/Estudio integrado de Diaporthe y Phytophthora en almendro/
MICINN-FEDER/Programa Estatal de I+D+I orientada a los retos de la sociedad/PID2020-114648RR-C33/ES/BIOLOGIA, EPIDEMIOLOGIA Y CONTROL DE DIAPORTHE AMYGDALI Y OOMICETOS FITOPATOGENOS EN ALMENDRO/
Program
Fructicultura
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