Stomatal conductance
Stomatal conductance was measured in one young leaf in five
plants of each treatment by using a porometer system (Porometer
AP4, Delta-T Devices Ltd, Cambridge, UK) following the user manual
instructions. Stomatal conductance measurements were taken
in the second young leaf of each plant at midday the day before
harvest. Plants were watered early in the morning and brought
back at 50% WHC. At midday, SC measurements were performed
in full-developed young leaves