Messung von Merkmalen der quantitativen Scharkaresistenz der Pflaume und Nachweis ihrer Wechselbeziehungen

• DOI: 10.1111/j.1439-0434.1989.tb01052.x
• Publication Date: 2008-05-01T16:32:34Z
• Authors: H. Kegler; H. Kleinhempel; U. Meyer; K. Berka; Maria Grüntzig
• Keywords: 0301 basic medicine; 03 medical and health sciences; 3. Good health

AbstractMeasurement of the characteristics of the quantitative resistance in plum to the plum pox virus and evidence for their interrelationsTwo 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.