Table 4.
Evidence for production of volatile inhibitory compounds in bacterial endophytes.
| Strain1 | Medium2 | Colony radius (cm)3 | |
|---|---|---|---|
| Expt 1 | Expt 2 | ||
| PDA control | PDA | 34.4 a | 20.2 a |
| WP 4-2-2 | PDA | 33.7 bcd | Not tested |
| WP 4-4-6 | PDA | 33.2 de | 19.3 bc |
| WP 4-5-3 | PDA | 34.0 abc | 20.0 a |
| WP 4-10-4 | PDA | 34.2 abc | 19.0 c |
| WP40 | PDA | 33.0 e | 19.3 bc |
| WP41 | PDA | 34.2 ab | 19.8 ab |
| Pf Q8r1-96 | PDA | 34.0 abc | 19.7 ab |
| Pf -5 | PDA | 33.5 cde | 20.0 a |
| MG/L control | MG/L | 34.7 a | 31.3 a |
| WP 4-3-2 | MG/L | 34.2 a | 30.8 a |
| Pf 2-79 | MG/L | 34.3 a | 29.8 b |
1
Controls were done with medium only; WP41 was included as a negative endophyte control.
2
Preferred medium for rapid growth.
3
Radius of the R. solani AG8 colony 5 d and 4 d after growth on I-plates for experiments 1 and 2, respectively. n = 3. Letters indicate significant (P < 0.05) differences among means within each column, based on Fisher's LSD (Statistix, Tallahassee, FL).