Abstract
Apple (Malus × domestica Borkh. cv. Golden Delicious) trees were inoculated with fungal pathogens, corresponding either to an incompatible strain of Venturia inaequalis or to non-host pathogens (Venturia pyrina, Alternaria brassicicola) in order to characterize the regulation of PR-10 genes in these different situations in relationship to symptom development. Macro-and microscopic observations of the plant-fungus interactions revealed typical symptoms of resistance with V. inaequalis and symptoms of hypersensitivity (HR) on around 5 % of leaves with V. pyrina. No HR was microscopically observed with A. brassicicola. In the non-host situations, the PR-10 expression in leaves at the transcriptional level was not (A. brassicicola) or very slightly (V. pyrina) activated. This strongly suggests that PR-10 is not a component of the non-host resistance in the interactions studied here. By contrast specific up-regulation of PR-10 was evident after inoculation with V. inaequalis.
Abbreviations
- Ct:
-
cycle threshold
- HR:
-
hypersensitive response
- ITS:
-
internal transcribed spacers
- PR:
-
pathogenesis related
- SEM:
-
scanning electron microscopy
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Chevalier, M., Parisi, L., Gueye, B. et al. Specific activation of PR-10 pathogenesis-related genes in apple by an incompatible race of Venturia inaequalis . Biol Plant 52, 718–722 (2008). https://doi.org/10.1007/s10535-008-0138-9
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DOI: https://doi.org/10.1007/s10535-008-0138-9