Table 1.
Bacterial strain added | Pythium added | Fresh wt per flask (g) |
Colonization (mean log CFU of inoculants/g of roots ± SD) | |
---|---|---|---|---|
Shoot | Root | |||
None | − | 0.60A | 0.33A | ND |
CHA0(pBBRMCS-5) | − | 0.55A | 0.32AB | 6.91 ± 0.24 |
CHA0PSOR(pBBRMCS-5) | − | 0.58A | 0.33AB | 7.42 ± 0.30 |
CHA0(pBBRPsoR) | − | 0.60A | 0.37A | 6.94 ± 0.14 |
None | + | 0.53A | 0.13D | ND |
CHA0(pBBRMCS-5) | + | 0.58A | 0.28B | 7.42 ± 0.14 |
CHA0PSOR(pBBRMCS-5) | + | 0.56A | 0.19C | 7.49 ± 0.36 |
CHA0(pBBRPsoR) | + | 0.52A | 0.27B | 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.