Table 2.
Effects of CO2 enrichment on the activities of soluble fructokinase and hexokinase from different organs of pepper flowers
| Enzymatic activity | ||||
| Fructokinase | Hexokinase | |||
| Organ | Control | High CO2 | Control | High CO2 |
| nmol (10–6 pollen grains)–1 min–1 | ||||
| Pollen | 32 ± 2 | 48 ± 3 | 3·0 ± 0·1 | 3·8 ± 0·1 |
| nmol (mg protein)–1 min–1 | ||||
| Pollen | 650 ± 100 | 1080 ± 85 | 56 ± 7 | 84 ± 8 |
| Anther | 3·6 ± 0·5 | 4·9 ± 0·2 | 1·3 ± 0·2 | 2·6 ± 0·3 |
| nmol (g f.wt used in test)–1 min–1 | ||||
| Anther | 15 ± 1·2 | 25 ± 1·8 | 2·0 ± 0·3 | 2·8 ± 0·2 |
Control treatment is 26/22 °C (day/night) and high CO2is 26/22 °C + high CO2.
Data are means (n = 5) ± s.e.