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Table 1 Pythium -induced disease symptoms on rice seedlings at 10 dpi

From: Pythium species from rice roots differ in virulence, host colonization and nutritional profile

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
  1. *Mean shoot and root length data (n = 18).
  2. **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.
  3. ***The percentage of dead seedlings displays the mean number of shoots (n = 3) with disease severity score 5.
  4. 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.