Fig. 1. Relative rates of acetylene reduction activity (ARA) and root plus nodule respiration (RNR) during drought stress. Fraction transpirable-soil water (FTW) for water-deficit treatments on Day 1 through 5 were 0.60, 0.24, 0.19, 0.15, and 0.10, respectively. Error bars represent + SE (n = 4).