CONSTITUTIVE AND INDUCED RESISTANCE IN HAZELNUT CULTIVARS

The chemical inducers acibenzolar-S-methyl (BTH), -aminobutyric acid (BABA) and potassium monophosphate (KH2PO4) were tested for their capacity to control hazelnut cankers caused by Cytospora corylicola. Chemicals were applied twice by foliar spray (BTH and KH₂PO₄) or soil drench (BABA) on hazelnut plants, cultivars ‘Tonda Gentile Romana’ and ‘Nocchione’, which represent the most common ones in the district of Viterbo (Central Italy). Treated plants were assayed for the induction in their tissues of pathogenesis related (PR) proteins -1.3 glucanase, chitinase and peroxidase, as biochemical indicators of resistance.
Beside the presence of constitutive isoenzymatic forms, the results show that the chemical inducers activated the differential induction of particular de novo synthesised isoenzymes of these proteins.
Two dimensional electrophoresis were applied to demonstrate differences between protein species.
Moreover, novel protein species previously reported from plant-pathogens interactions and some species with unknown homologues were reported and identified by using mass spectrometry.
Hazelnut plants treated with the three chemical inducers of resistance were inoculated with the three pathogens and disease development and severity was evaluated.

VII International Congress on Hazelnut

P. Magro, C. Ciambella, D. Sborchia, M.P. Aleandri, G. Chilosi, A.M. Timperio

hazelnut cankers, induced resistance, acibenzolar-S-methyl, β-aminobutyric acid, potassium monophosphate

https://doi.org/10.17660/ActaHortic.2009.845.76