TABLE 2.
Stimulation of methane emission by isolated hindguts of P. ephippiata (third instar) incubated in Ringer's solution by the addition of external electron donors
| Substrate added | CH4 formation rate (μmol g−1 h−1)a
|
Stimulation (fold)a | n | |
|---|---|---|---|---|
| Basal | After addition | |||
| H2b | 0.13 ± 0.03 | 0.21 ± 0.01 | 1.8 ± 0.4 | 3 |
| Methanolc | 0.15 ± 0.08 | 0.50 ± 0.20 | 4.3 ± 1.2 | 5 |
| Formated | 0.28 ± 0.19 | 1.04 ± 0.50 | 4.9 ± 1.2 | 4 |
a
All values are based on the fresh weight of the hindgut and are means ± standard errors for n different larvae.
b
Headspace partial pressure of 20 kPa.
c
Final concentration of 5 mM.
d
Final concentration of 10 mM.