TABLE 5.
Nodulation response of two soybean genotypes in response to population density of the wild type and nolA and nodD2 gene mutants of B. japonicum USDA110 in natural, nonsterile soil
| Strain and inoculum density (cells/ml) | Nodulation response on G. max genotypea
|
|||
|---|---|---|---|---|
| cv. Lambert
|
PI 417566
|
|||
| No. of nodules | Nodule dry mass (mg) | No. of nodules | Nodule dry mass (mg) | |
| Wild type | ||||
| 105 | 20.3 E | 32.6 BC | 6.7 DE | 36.3 A |
| 109 | 24.3 B | 20.3 F | 2.7 H | 12.0 E |
| nolA mutant | ||||
| 105 | 22.3 CD | 37.9 AB | 8.0 CD | 34.0 A |
| 109 | 24.3 BC | 28.7 CD | 12.3 B | 36.0 A |
| nodD2 mutant | ||||
| 105 | 23.0 BC | 35.2 B | 9.7 C | 35.7 A |
| 109 | 27.3 A | 45.6 A | 15.0 A | 37.3 A |
| Uninoculated | 0 H | 0 G | 0 I | 0 F |
a
Values are means of results for three replicate experiments. Nodule number and dry mass values are per plant. Numbers in a column not followed by the same letter differ significantly at a P value of 0.05 as tested by ANOVA and the Duncan-Waller multiple-range test.