. 2017 Sep 14;8:1546. doi: 10.3389/fpls.2017.01546

Table 2.

Nodule number per plant, nodule fresh weight per plant, nodule density, and single nodule N fixation of eight soybean cultivars grown for 120 days (R8) under aCO₂ or eCO₂.

	Nodule number (number plant⁻¹)		Nodule fresh weight (mg plant⁻¹)		Nodule density (number m⁻¹)		Fixed-N per nodule (mg nodule⁻¹)
	aCO₂	eCO₂	aCO₂	eCO₂	aCO₂	eCO₂	aCO₂	eCO₂
XHJ	80	132^*	368	1,392^*	1.35	1.87^*	2.04	3.54^*
SN14	132	136^ns	431	1,726^*	2.71	2.27^*	1.89	3.42^*
SN8	78	112^*	554	1,480^*	1.19	1.51^*	3.19	3.58^ns
HN45	101	142^*	368	1,035^*	1.82	2.32^*	1.73	1.65^ns
SN22	104	171^*	712	1,376^*	1.74	2.54^*	1.64	1.36^ns
HJ6	55	108^*	509	1,698^*	1.05	1.48^*	3.71	2.10^*
NF9	56	62^*	353	1,125^*	1.08	1.03^ns	3.83	3.92^ns
NF1	30	42^*	228	560^*	0.52	0.67^*	8.97	5.56^*
LSD_0.05	10.3		307		0.15		0.33
SIGNIFICANCE LEVEL
CO₂	<0.001		<0.001		<0.001		<0.001
Cultivar	<0.001		<0.001		<0.001		<0.001
CO₂×Cultivar	<0.001		0.002		<0.001		<0.001

and ns indicate significant and non-significant difference (t-test) between aCO₂ and eCO₂ within a genotype, respectively, for individual cultivars. LSD values correspond to the CO₂ × cultivar interaction (two-way ANOVA).