highly significantP<0.001
We found a significantly higher N concentration in mistletoe on N-fixing hosts than on non-N-fixing hosts ( Figure 5A ), and a highly significant correlation of leaf δ 15 N between mistletoe and host (R 2 = 0.94, P<0.001) across the nine mistletoe–host pairs (both N-fixing and non-N-fixing hosts, Figure 3F ), indicating a high N dependency of mistletoe on its hosts.