Table 5.
Presence and intensity of the symptoms recorded in the plants systemically infected by Xylella fastidiosa. The data refer to the number of plants (out of a total of ten) that showed symptoms within the first 14 months post inoculation (mpi) and at 24 mpi. Three plants were destructively sampled at 14 mpi thus the total plants at 24 mpi do not correspond to the original inoculated plants. Reduction in growth was determined by measuring the plant size (expressed as height) of the symptomatic plants and mock-inoculated controls. F-test in One-Way ANOVA was used and outputs for ANOVA and Tukey’s HSD post-hoc tests are reported in the Supplementary Table S4.
| CULTIVAR | PLANTS SHOWING DESICCATION | % OF THE CANOPY AFFECTED BY DESICCATION1 | PLANTS SHOWING DESICCATION2 | % OF THE CANOPY AFFECTED BY DESICCATION3 | REDUCTION IN PLANT SIZE4 (%) |
|---|---|---|---|---|---|
| 14mpi | 24mpi | ||||
| CELLINA DI NARDO’ | 7/10 | 44.8 ± 14.3 a | 6/7 | 85.7 ± 14.3 a | 36.5 |
| CORATINA | 0/10 | 0.0 ± 0.0 b | 2/7 | 7.4 ± 5.1 b | 17.9 |
| FRANTOIO | 2/10 | 4.0 ± 2.7 b | 5/7 | 23.3 ± 7.2 b | 24.9 |
| LECCINO | 3/10 | 1.9 ± 0.9 b | 6/7 | 42.0 ± 8.6 b | 7.5 |
1,3Average values. These values were calculated by measuring the length (cm) of the symptomatic portion of each shoot on the total length (cm) of the shoots present on each plant. The standard error of the mean (SEM) is used to describe the variability within the sample.
2Number of plants showing symptoms at 24 mpi over the total number of plants under observation after the destructive sampling.
1,3Different letters represent significant differences between mean values at p < 0.05, according to one-way ANOVA comparison, followed by Tukey’s HSD post-hoc test.
4Values are expressed in percentage and indicate the height difference between mock-inoculated and symptomatic plants.