| Bacterial culture |
Acetylene added |
Rate |
| µg N2 h-1 mg dry wt cells-1 |
µg N2O h-1 mg dry wt cells-1 |
| Pseudomonas aeruginosa |
No |
22.6 ± 6.8a,b
| 35.5 ± 10.7 a,b,c
|
| Pseudomonas aeruginosa |
Yes |
UDd
| 25.8 ± 3.3a,b
|
| Pseudomonas chloroaphis |
No |
UDd
| 2.9 ± 1.0b,e
|
| Pseudomonas chloroaphis |
Yes |
UDd
| 2.3 ± 1.1b,e
|
amean of five determinations; bBased on the results of t-tests (p > 0.05), we failed
to reject the null hypothesis that the means of the rates obtained the presence
and absence of acetylene with either P. aeruginosa (single underline) and P.
chloroaphis (double underline) were the same; cValue was not measured directly
as N2O was not produced. The rate was obtained by converting the rate, measured
by the production of N2, to N2O h-1 mg dry wt cells-1; dUD, unable to determine as N2
was not produced. emean of triplicate determination |
