L e a f g a s e x c h a n g e : Stomatal conductance of
specific leaf positions, where inoculation had taken place,
was measured with an open photosynthesis system (GFS
3000, Walz, Germany) using a leaf chamber of a cuvette
area of 3 cm2. Measurements were taken by selecting cuvette
temperature and carbon dioxide set to ambient. CO2
concentrations ranged from 440 to 455 μmol·mol-1. Airflow
was fed through the chamber at 750 ml·min-1.