Skip to main content

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.