Journal of Plant Pathology (2002) 84, 19-25

O. Métoui, A. Porta-Puglia, M. Marrakchi, M. Kharrat and R. Angelini (2002)
The Vicia faba diamine oxidase system and its role in response to Ascochyta fabae and to wounding
Journal of Plant Pathology 84 (1), 19-25
Abstract: Diamine oxidase (DAO) activity was determined in internodes and leaves of faba bean (Vicia faba L.) cultivars susceptible and resistant to Ascochyta blight. DAO activity was measured in stems and leaves of whole plants and on detached leaves, untreated or inoculated with a highly virulent Ascochyta fabae isolate. DAO activity was higher in leaves than in stems, and decreased acropetally along the plant. No increase in activity was detected as a response to inoculation. The time course of DAO activity was analysed during A. fabae infection of the third leaf of V. faba seedlings. In fact, DAO activity with different inoculum concentrations showed no significant differences between inoculated plants and controls. Moreover, no increase was detected either in the susceptible line 14-12 or in the resistant line 29H. The time courses of DAO activity was also analysed during wound healing of the third internodes and leaves of the faba bean cultivar 'Lunga delle Cascine' and line 29H. Enzyme activity was enhanced during the days following wounding, showing that this enzyme may have an important role in tissue repair.
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Full text of article
Database assignments for author(s): Angelo Porta-Puglia, Mohamed Kharrat

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host
molecular biology - genes

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Ascochyta fabae	Broad/faba bean (Vicia faba)