. 2011 Jul;77(13):4579–4588. doi: 10.1128/AEM.00183-11

Table 1.

Contribution of PsoR to the suppression of Pythium damping-off disease of wheat by Pseudomonas fluorescens CHA0 in natural soil^a

Bacterial strain added	Pythium added	Fresh wt per flask (g)		Colonization (mean log CFU of inoculants/g of roots ± SD)
Bacterial strain added	Pythium added	Shoot	Root	Colonization (mean log CFU of inoculants/g of roots ± SD)
None	−	0.60^A	0.33^A	ND
CHA0(pBBRMCS-5)	−	0.55^A	0.32^AB	6.91 ± 0.24
CHA0PSOR(pBBRMCS-5)	−	0.58^A	0.33^AB	7.42 ± 0.30
CHA0(pBBRPsoR)	−	0.60^A	0.37^A	6.94 ± 0.14
None	+	0.53^A	0.13^D	ND
CHA0(pBBRMCS-5)	+	0.58^A	0.28^B	7.42 ± 0.14
CHA0PSOR(pBBRMCS-5)	+	0.56^A	0.19^C	7.49 ± 0.36
CHA0(pBBRPsoR)	+	0.52^A	0.27^B	7.42 ± 0.17

The data represent means from 10 replicate flasks (each containing three wheat plants) per treatment. Means within the same column followed by different superscript capital letters are significantly different (P ≤ 0.05) according to Fisher's protected LSD test. The experiment was repeated once with similar results. ND, not detected. P. fluorescens strains were added at 10⁷ CFU per g of natural soil contained within 200-ml flasks (60 g of soil per flask), after planting three 90-h-old, sterile-grown wheat seedlings per flask. P. ultimum was added (+) or not added (-) as a millet-seed inoculum to soil before planting. Plants were harvested after 14 days.