TABLE 2.
Strain | Relevant genotypea | Number of nodules | Nodule dry weight | Nitrogenase activityb | Relative Fix activityc |
---|---|---|---|---|---|
mg | %/min/g | % | |||
110spc4 | Wild type | 20.4 ± 4.0 | 2.4 ± 0.7 | 3.0 ± 0.7 | 100 ± 22.3 |
6611 | ΔpcuABCDE-a | 25.8 ± 7.8 | 1.3 ± 0.3 | 0.8 ± 0.5 | 25.9 ± 16.9 |
6612 | ΔpcuABCDE-b | 23.3 ± 5.1 | 1.4 ± 0.4 | 0.7 ± 0.4 | 24.4 ± 12.5 |
a Strain 6611 has insert in the same orientation (-a) and strain 6612 in the opposite orientation (-b).
b Nitrogenase activity is expressed as percentage of C2H4 formed/min/g.
c Relative nitrogen fixation activity is expressed as a percentage of wild type.