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Phosphonate alters the defence responses of Lambertia species challenged by Phytophthora cinnamomi

Suddaby, Therese ; Alhussaen, Khalaf ; Daniel, Rosalie ; Guest, David

Australian journal of botany, 2008-01, Vol.56 (6), p.550-556 [Periódico revisado por pares]

Collingwood, Victoria: CSIRO Publishing

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  • Título:
    Phosphonate alters the defence responses of Lambertia species challenged by Phytophthora cinnamomi
  • Autor: Suddaby, Therese ; Alhussaen, Khalaf ; Daniel, Rosalie ; Guest, David
  • Assuntos: biochemical pathways ; disease outbreaks ; disease resistance ; enzyme activity ; fungal diseases of plants ; Lambertia ; Lambertia formosa ; Lambertia inermis ; microbial colonization ; mortality ; phenylalanine ammonia-lyase ; phenylpropanoids ; phosphonates ; Phytophthora cinnamomi ; plant pathogenic fungi ; potassium phosphonate ; resistance mechanisms ; roots ; shrubs ; signs and symptoms (plants) ; species differences ; superoxide anion
  • É parte de: Australian journal of botany, 2008-01, Vol.56 (6), p.550-556
  • Notas: The Australian Journal of Botany is an international journal publishing original research encompassing all plant groups including fossil plants. Plant science areas covered by the scope are as follows: ecology and ecophysiology, conservation biology and biodiversity, forest biology and management, cell and molecular biology, palaeobotany, reproductrive biology and genetics, mycology and pathology, structure and development.
    http://dx.doi.org/10.1071/BT07228
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  • Descrição: Phytophthora cinnamomi is a destructive pathogen that causes dieback and death in many plant species in Australian native ecosystems. Susceptibility varies widely between related taxa, although the reasons for this variability are poorly understood. In glasshouse studies we confirmed field observations that Lambertia formosa , a New South Wales shrub, is less susceptible to P. cinnamomi than the related Western Australian species, L. inermis . Following inoculation, L. inermis roots are heavily colonised by the pathogen, leading to dieback and high mortality rates. Pathogen restriction in L. formosa correlates with more rapid and intense release of superoxide at the penetration site, and the activation of the phenylpropanoid pathway, than in L. inermis root tissues. Potassium phosphonate reduces symptom severity in inoculated L. formosa , and reduces both mortality and symptom severity in L. inermis. Phosphonate-induced protection in both species is associated with increased superoxide release 8 h after inoculation, and increased phenylalanine ammonia lyase activity 24 h after inoculation.
  • Editor: Collingwood, Victoria: CSIRO Publishing
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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