TABLE 3.

Nitrogen content and dry weight of Vigna unguiculata plants inoculated with the Bradyrhizobium sp. (Vigna) wild-type M5 and hupSL mutant M5.1 strains in three independent experiments^a

Experiment	Strain	30 days		40 days
		N content	Dry weight	N content	Dry weight
I	M5	58.4a	1.31a	81.4a	2.48a
	M5.1	40.7b	1.24a	74.3b	2.46a
	Uninoculated	6.11c	0.48b	2.91c	0.56b
II	M5	46.7a	1.25a	113.1a	3.64a
	M5.1	30.2b	0.94b	102.4b	4.71a
	Uninoculated	6.05c	0.43c	2.53c	0.61b
III	M5	ND	ND	81.1a	3.31a
	M5.1	ND	ND	70.2b	3.02a
	Uninoculated	ND	ND	2.35c	0.49b

^aDeterminations were carried out after 30 or 40 days of cultivation. Nitrogen content (determined with a Kjeldhal apparatus) is expressed as mg plant⁻¹ and dry weight (measured after drying for 48 h at 80°C) in g plant⁻¹. Values are averages of eight determinations. Different letters within the same column and experiment indicate significant differences at 1% based on Duncan's test. ND, not determined.