Abstract
Abstract Measurement of the characteristics of the quantitative resistance in plum to the plum pox virus and evidence for their interrelations Two plum clones, with different degrees of susceptibility towards the plum pox virus (PPV), were inoculated with either a weakly or strongly pathegonic strain of PPV. The symptoms which developed in the older leaves (i. e. the 3rd to 5th basal leaves) were measured by visual rating as well as with the aid of a UV‐VIS‐spectralphotometer SPECORD M 40. Additionally, the relative virus concentrations in these leaves were determined by ELISA. Significant differences were established between the infected leaves of the PPV‐sensitive and PPV‐resistant plum clones, irrespective of the method of measurement. The values recorded for the weakly and strongly pathogenic PPV strains were significantly different only with the PPV‐sensitive clone. A significant correlation was established between the visual ratings and the colormetrical values or the ELISA‐values, as well as between the individual colormetrical values a, L and b. In the system plum‐PPV, the b‐values are the most important in the evaluation of the severity of the symptoms and in the qualitative colour changes.
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Claims 5
Claim · model-written summary
Infected leaves differed significantly between sensitive and resistant plum clones by all measurement methods.
- Taxon
- plum
Prunus domesticae0 - Material
- PPV‐sensitive and PPV‐resistant plum clonese0
- Interactor
- PPVe0pathogen
- Outcome
- infected leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were established between the infected leaves of the PPV‐sensitive and PPV‐resistant plum clones, irrespective of the method of measurement”
Claim · model-written summary
Weakly and strongly pathogenic strains differed significantly only in the sensitive clone.
Verbatim
e0“The values recorded for the weakly and strongly pathogenic PPV strains were significantly different only with the PPV‐sensitive clone”
t0“Pflaume”
Claim · model-written summary
Visual ratings correlated significantly with colorimetric and ELISA values.
Not reportedDirection
Verbatim
e0“A significant correlation was established between the visual ratings and the colormetrical values or the ELISA‐values”
t0“Pflaume”
Claim · model-written summary
Colorimetric a, L and b values were significantly correlated.
- Taxon
- Pflaumet0
- Outcome
- colormetrical values a, L and be0
- Comparator
- individual colormetrical values a, L and be0
Not reportedDirection
Verbatim
e0“as well as between the individual colormetrical values a, L and b”
t0“Pflaume”
Claim · model-written summary
The b value was most important for assessing symptom severity and color change.
Verbatim
e0“the b‐values are the most important in the evaluation of the severity of the symptoms and in the qualitative colour changes”
t0“Pflaume”