Figure legends
Figure 1. The temperature response of photosynthesis at 400 ppm
CO2 (P400; left-hand panels) and at 800
ppm CO2 (P800; right hand panels) ofTabebuia rosea plants, as affected by growth conditions. Panels a
and b show the effect of growth at elevated temperature and
[CO2] relative to control plants grown at ambient
conditions; effects of short-term transfer from control to treatment (c,
d), and from treatment to control conditions (e, f) are also shown.
Curves were fitted with Eqn 6 with MCMC sampler (4000 iterations, 100
random samples are plotted). TOpt is indicated in solid
lines for control (blue) and treatment (red) plants; dashed lines
indicate the 5 and 95% percentiles of the credible interval of
TOpt.
Figure 2. Posterior distributions of TOpt of
P400 (a), P800 (b),
VCMax (c), and JMax (d), with
highlighted 50, 90, and 99% credible intervals.
Figure 3. Maximum RuBP carboxylation capacity (left-hand
panels) and maximum electron transport rate (right-hand panels) in
relation to leaf temperature in Tabebuia rosea plants. Panels a
and b show the effect of growth at elevated temperature and
[CO2] relative to control plants grown at ambient
conditions; effects of short-term transfer from control to treatment (c,
d), and from treatment to control conditions (e, f) are also shown.
Curves were fitted with Eqn 3 with MCMC ( iterations).
TOpt is indicated in solid lines for control (blue) and
treatment (red) plants; dashed lines indicate the 5 and 95% percentiles
of the credible interval of TOpt.
Figure 4. JMax to VCMax ratio
in relation to leaf temperature in Tabebuia rosea plants grown at
ambient conditions and plants grown at elevated temperature and
[CO2] conditions (a). Also shown are
JMax to VCMax ratios of control plants
before and after they were transferred to treatment conditions (b) and
of treatment plants before and after they were transferred to control
conditions (c).
Figure 5. Stomatal conductance (gs) in relation
to leaf temperature (left-hand panels) and leaf-to-air vapor pressure
deficit (VPD) (right-hand panels) in Tabebuia rosea plants grown
at ambient conditions and plants grown at elevated temperature and
[CO2] conditions (top). Also shown are relationships
of control plants before and after they were transferred to treatment
conditions (center) and of treatment plants before and after they were
transferred to control conditions (bottom).
Figure 6. Stomatal limitation of net photosynthesis determined
with Eqn 7 in relation to temperature in Tabebuia rosea plants
grown at ambient (control) and at elevated temperature and
[CO2] (left-hand panels), and plants that were
transferred from control to treatment and from treatment to control
conditions (right-hand panels). Complete suppression of photosynthesis
by low stomatal conductance would yield an l of 1.0, whereas 0
indicates that measured photosynthesis is identical to what it would be
under infinite stomatal conductance.
Figure 7. Dark respiration rates in relation to leaf
temperature in Tabebuia rosea plants grown at ambient conditions
and plants grown at elevated temperature and [CO2]
conditions (a). Also shown are respiration rates of control plants
before and after they were transferred to treatment conditions (b) and
of treatment plants before and after they were transferred to control
conditions (c) Curves were fitted to the data pooled across 4–5 plants
per treatment with Eqn 2 with MCMC (100 random samples of which are
plotted).
Table 1. Leaf mass per area (LMA), concentrations of leaf
nitrogen (N) and carbon (C), and nitrogen concentration per unit leaf
area (NArea) for Tabebuia rosea plants (n = 4)
grown at ambient (Control) and elevated temperature and
CO2 concentration (Treatment), and then transferred from
control to treatment conditions and vice versa before being
re-measured after >7 days.