Table 1. Comparison of the carbon uptake kinetics of freshwater cyanobacteria and green algae measured by MIMS using the chemical disequilibrium assay (29, 30).
Units for K1/2 and Vmax are μM and μmol C (mg chl a)−1 hour−1, respectively.
| Species | Net CO2 uptake | Bicarbonate uptake | References | ||||||
| K½,CO2 | Vmax,CO2,net | K½,HCO3 | Vmax,HCO3 | ||||||
| Low | High | Low | High | Low | High | Low | High | ||
| pCO2 | pCO2 | pCO2 | pCO2 | pCO2 | pCO2 | pCO2 | pCO2 | ||
| Cyanobacteria | |||||||||
|
Microcystis aeruginosa PCC 7806 |
0.4 | 1.6 | 23 | 118 | 5 | 12 | 112 | 103 | This study |
|
Microcystis aeruginosa PCC 7941 |
0.6 | 0.9 | 73 | 134 | 8 | 9 | 92 | 55 | This study |
|
Synechococcus PCC 7942 |
0.4 | 5.6 | 165 | 110 | 15 | 270 | 224 | 126 | 23 |
|
Synechococcus PCC 7942 |
0.5 | 3.6 | 103 | 116 | 9 | 248 | 230 | 206 | 24 |
|
Synechocystis PCC 6803 |
1 | 3.5 | 145 | 173 | 4.8 | 86 | 281 | 218 | 22 |
| Green algae | |||||||||
|
Chlamydomonas noctigama |
3.1 | 8.1 | 37 | 39 | 75 | 379 | 41 | 37 | 49 |
|
Chlamydomonas reinhardtii |
2 | 15 | 46 | 36 | 26 | 104 | 38 | 60 | 50 |
|
Chlamydomonas reinhardtii |
0.9 | 8.3 | 113 | 82 | 78 | 316 | 92 | 75 | 51 |
|
Scenedesmus obliquus |
0.3 | 4.5 | 107 | 105 | 13 | 55 | 34 | 35 | 50 |
| Tetraedron minimum | 2.1 | 9.4 | 11 | 7 | 279 | 841 | 60 | 53 | 49 |