Research Progress and Perspectives of Nitrogen Fixing Bacterium, Gluconacetobacter diazotrophicus, in Monocot Plants

Table 3

Nitrogenase activity of Gluconacetobacter diazotrophicus strains Pal5 and Mad3A measured by acetylene reduction assay.

Nitrogen sources	Nitrogenase activity (nmol C2H4 h^−1 mg^−1 protein)
	Pal5	Mad3A	Control
Nitrogen free	296±16	0	0
1 mM NO3^−	269±15	0	0
10 mM NO3^−	228±21	0	0
1 mM NO4^+	103±19	0	0
10 mM NO4^+	0	0	0

∗Results are ±SD averages of 3 replicates for each treatment (Yoon and Tian, unpublished).