Table 1.

Root nodulation assays on S. rostrata

Treatment	Tube assay		Leonard jar assay
	Type	Number	Type	Number
Control	D	100.0 ± 11.6 a	I	34.2  ±  2.1 a
10 μM Ag2SO4	I	20.1 ±  2.0 b	I	33.0  ±  4.7 a
20 μM ACC	D	105.2 ± 10.3 a	D	45.0  ±  6.6 a
20 μM CEPA	D	ND	D	44.8  ±  5.1 a

Type (D, determinate; I, indeterminate) and number (average of three independent experiments with 10 plants each) of mature nodules developed on S. rostrata roots grown in tubes or in the vermiculite compartment of Leonard jars are tabulated. The same letter in a column indicates numbers that are significantly different (P > 0.05). ND, not determined.