Species | Shoot length (cm)* | Root length (cm)* | DSI%** | Dead seedlings %*** |
---|
Control | 16.07 (0.34) a | 9.19 (0.43) a | 3 (1.92) a | 0 a |
P. arrhenomanes
| 6.24 (0.62) b | 3.42 (0.15) b | 59 (7.22) b | 28 (11.11) b |
P. graminicola
| 10.26 (0.57) c | 4.74 (0.23) c | 32 (1.00) c | 0 a |
P. inflatum
| 17.97 (0.42) a | 9.06 (0.50) a | 23 (0) d | 0 a |
- *Mean shoot and root length data (n = 18).
- **Average disease severity indices (DSI) (n = 3) were calculated using the disease severity scale (see “Methods”). Indices vary from 0% (healthy shoots) up to 100% (dead shoots) and illustrate the degree of yellowing or browning in culms and leaves in parallel with shoot stunting. Eighteen plantlets were individually scored for each treatment.
- ***The percentage of dead seedlings displays the mean number of shoots (n = 3) with disease severity score 5.
- Statistical analyses were mostly performed by Kruskal-Wallis and Mann–Whitney non-parametric tests in SPSS 21 (SPSS Inc.). Only shoot length data were normally distributed and therefore, analyzed with one-way ANOVA and the Duncan Post-Hoc test. In each column, distinct lower case letters (a,b,c,d) indicate significant differences between the treatments (α = 0.05, P ≤ α). Values between brackets are standard errors.