. 2010 Apr 2;61(9):2281–2291. doi: 10.1093/jxb/erq055

Table 3.

Nodule CO₂ fixation per plant, specific N₂, CO₂ fixation per nodule mass and specific CO₂ fixation per N fixed in experiment four

Parameter	Unit	Time of measurement
Parameter	Unit	Vegetative growth 23–24 DAE	Pod formation 41–42 DAE
¹³C fixation through nodules	μg h⁻¹ plant⁻¹	0.5	14.6*
Nodule specific ¹³C fixation	mg nodule dm⁻¹ h⁻¹	33	120*
Nodule specific ¹⁵N₂ fixation	mg N nodule dm ⁻¹ h⁻¹	1.45	1.88
CO₂ fixation per N₂ reduced	g C g N⁻¹	0.04	0.11*

Data are means of four or two replicates from plants at vegetative growth or at pod formation, respectively. An asterisk indicates a statistically significant difference compared to the measurement at vegetative growth (t test, P ≤0.05).