Table I. NO3 and NO2 reductase activities in nodule, root, and leaf of M. truncatula plants

Data are means ± sd of six (nodule) or three (root and leaf) independent experiments.

NR or NiRNoduleRootLeaf
NR (nmol min−1 g−1 fresh weight)9.7 ± 1.23.3 ± 1.31.7 ± 0.6
NiR (nmol min−1 g−1 fresh weight)18.5 ± 2.326.1 ± 8.313.2 ± 5.0
NiR-NR1.97.97.8