The
[CO2
] in the leaf chamber was controlled by the LI-COR CO2
injection system, and an irradiance of 1 600 μmol photons
m–2 s–1 was supplied using an built-in LED lamp (red/blue).
Values of Pn
and Ci
were used to calculate Vc, max and Jmax
using the model described by Sharkey et al (2007). Pn
and
Gs were also measured at the same irradiance, temperature
and the vapour pressure when measurements. [CO2
] in the
leaf chamber was set to 400 and 550 μmol mol–1 for each
treatment, and three upper most fully-expanded leaves were
measured per plot.