Plant Pathology (1998) 47, 687-692

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J.J. Diez and L. Gil (1998)
Variability in phenylalanine ammonia-lyase activity among cell cultures of elm clones inoculated with Ophiostoma novo-ulmi spores
Plant Pathology 47 (6), 687-692
Abstract: Sixteen elm genotypes with different levels of resistance to the Dutch elm disease (DED) were chosen to establish cell suspension cultures. After inoculation with spores of Ophiostoma novo-ulmi, an increase in phenylalanine ammonialyase (PAL) activity was detected in most of the clones. This activation varied between genotypes and was not related to the degree of resistance to DED in the parent trees. The level of PAL activity increased greatly in the cells of some susceptible elms, as opposed to suspensions of some resistant elm tissues where no significant increases were found. These results invalidate the assessment of PAL enzyme activity in tissue cultures as means of screening elms for resistance to DED.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Julio Diez, Luis Gil

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

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Ophiostoma novo-ulmi Elm (Ulmus)