Detection of <i>Phytophthora cinnamomi</i> on declining <i>Araucaria araucana</i> forests

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dc.contributor.authorSanfuentes, Eugenio
dc.contributor.authorGonzalez, Mariela
dc.contributor.authorCastillo, Miguel
dc.contributor.authorRubilar, Rafael
dc.contributor.authorBesoain, Ximena
dc.contributor.authorSanhueza, Claudia
dc.contributor.authorSmith, Milena
dc.date.accessioned2025-01-20T21:03:24Z
dc.date.available2025-01-20T21:03:24Z
dc.date.issued2022
dc.description.abstractSince 2016, crown death and mortality of Araucaria araucana trees have been observed at different localities of the Nahuelbuta Coastal Range, Chile. The objective of this study was to determine the presence of Phytophthora spp. in the rhizosphere of A. araucana trees that may explain its decline. Samples of soil rhizosphere were collected from trees with crown death as well as from asymptomatic trees at two visually contrasting severity areas. Phytophthora detection from soil samples was carried out using leaf bait technique, and isolates were identified by morphology and molecular methods. Recovered Phytophthora isolates were used in pathogenicity tests with A. araucana plants. From rhizosphere soil samples of 30 A. araucana trees, 56 isolates of Phytophthora cinnamomi were obtained. Isolations were more frequent in the rhizosphere of trees with severe crown symptoms and originated exclusively from the selected area showing severe crown symptoms. Plant stem inoculation with P. cinnamomi isolates caused 100% mortality; however, through root infestation, mortality was variable depending on the specific isolate. These results are the first report of the pathogenicity of P.cinnamomi A2 in natural forests of A. araucana in Chile.
dc.fuente.origenWOS
dc.identifier.doi10.1111/efp.12765
dc.identifier.eissn1439-0329
dc.identifier.issn1437-4781
dc.identifier.urihttps://doi.org/10.1111/efp.12765
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93147
dc.identifier.wosidWOS:000842562700001
dc.issue.numero5
dc.language.isoen
dc.revistaForest pathology
dc.rightsacceso restringido
dc.subjectcrown dieback
dc.subjectforest diseases
dc.subjectmonkey puzzle
dc.subjectroot disease
dc.titleDetection of <i>Phytophthora cinnamomi</i> on declining <i>Araucaria araucana</i> forests
dc.typeartículo
dc.volumen52
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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