Table 1.

H₂ evolution of M. truncatula nodules after short-term increase of the temperature around shoots. Data are given as means of 10 replicates. The electron allocation coefficient (EAC, relative efficiency of nitrogenase) was measured at the beginning and the end of the experiment Data were compared statistically (within a column) between the points in time of the analysis but showed no significant differences (Tukey’s test, p < 0.05, n = 10; comparison of the EAC by the t-test, p < 0.05, n = 10).

Growth conditions	H2 evolution
	[μmol H2·h−1·plant−1]	EAC
20 °C/400 ppm CO2 around shoots	4.68	0.59
20 °C around nodules
1 h
30 °C/400 ppm CO2 around shoots	4.64	n.d.
20 °C around nodules
2 h
30 °C/400 ppm CO2 around shoots	4.64	n.d.
20 °C around nodules
6 h
30 °C/400 ppm CO2 around shoots	4.73	0.61
20 °C around nodules