Table 5.
Partial pressures of O2 (pO2; kPa) measured in the range 100–400 µm from the central cylinder in succulent stems of Tecticornia auriculata and Tecticornia medusa in air, submerged (i.e. as soon as stems were first submerged) or after 3 d of submergence, in light or darkness
| Species | Treatment | Light | Darkness |
|---|---|---|---|
| T. auriculata | air | 19·9 ± 0·8a | 19·1 ± 0·5e |
| submerged | 26·0 ± 1·7b | 3·8 ± 0·4b | |
| 3 d submerged | 21·4 ± 0·4ab | 7·5 ± 0·6c | |
| T. medusa | air | 26·1 ± 1·5b | 16·9 ± 0·5d |
| submerged | 34·2 ± 0·8c | 0·2 ± 0·1a | |
| 3 d submerged | 32·7 ± 1·4c | 0·5 ± 0·4a |
The mean diameters of stems were 3100 ± 130 and 6700 ± 110 µm for T. auriculata and T. medusa, respectively. Different letters indicate significant differences between columns using ANOVA and Tukey’s HSD post-hoc test (P < 0·05). Values are means ± s.e. (n = 4).