TABLE 6.
Substrate-dependent oxygen consumption by washed cells of thiocyanate-oxidizing alkaliphilic autotrophs grown with thiocyanate or thiosulfate at pH 10.0
| Sulfur compound | Maximum respiration rate (minus
endogenous rate) at pH 10.0 (nmol of O2 mg of
protein−1 min−1)
|
|||||||
|---|---|---|---|---|---|---|---|---|
| ARh 1 grown
with:
|
ARh 2 grown with:
|
ARh 3 grown
with:
|
ARh 4 grown with:
|
|||||
| CNS− | S2O32− | CNS− | S2O32− | CNS− | S2O32− | CNS− | S2O32− | |
| CNS− | 130/160a | 0 | 180/300 | 0 | 220 | 10 | 260/400 | 0 |
| CS2 | 60/90 | 12 | 0/0 | NDb | 0 | ND | 0 | ND |
| S2O32− | 210/580 | 350 | 580/10 | 360 | 280 | 120 | 450/180 | 480 |
| HS− | 1,500/2,900 | 3,800 | 1,400c/820 | 850 | 720c | 570c | 810c/740 | 800c |
| S62− (polysulfide) | 400 | 2,600 | 960c | 450 | 650c | 400c | ND/220 | 490c |
| S8 | 25/50 | 50 | 450/250 | 330 | 160 | 110 | 160/180 | 220 |
| S4O62− (pH 9) | 0/0 | 0 | 90 | 200 | 0 | 30 | 90/0 | 80 |
a
Rate for cells from a batch culture/rate for cells from a CNS−-limited chemostat.
b
ND, not determined.
c
Initial rate.