Analysis of morphological traits in pine needles and mistletoe leaves
One day before the labeling, 10 mistletoe leaves and 20 pine needles of each selected tree were harvested separately for leaf morphological measurements. Leaf area was measured using a scanner and image analysis software (PIXSTAT v1.3, WSL, Birmensdorf, Switzerland). Fresh weight of all leaves was firstly measured, and dry weight was measured after oven-drying the samples at 65°C for 5 d, and leaf water content and leaf mass per area (LMA) were then calculated.