. 2003 Oct;133(2):829–837. doi: 10.1104/pp.103.026518

Table II.

Net CO₂ assimilation rate (A) per leaf surface unit and per chlorophyll content, maximal net CO₂ assimilation rate in saturating light and CO₂ (A_max), evapotranspiration (E), CO₂ compensation point (Γ_{CO2 int}), dark respiration (R_dark), internal CO₂ concentration (CO_{2 int}), Rubisco activity (RuBPCase), initial slope of CO₂ assimilation rate curve response to photosynthetic photon flux density (δA/δ_PPDF) and to internal CO₂ concentration (δA/δCO_{2 int}), leaf absorptance (Leaf_abs), fluorescence estimation of photosystem II quantum yield (ΔF/F_m), photochemical (qP) and nonphotochemical (qN and NPQ) fluorescence quenching of absorbed light energy, basal (F₀), maximal (F_m), and fluorescence ratio (F_v/F_m with F_v = F_m-F₀) of dark-adapted leaves

P. australis plants were grown in the presence of 0 (control), 50, or 100 μm Cd in the hydroponic nutrient solution. Different letters in the same row mean significance of difference between the treatments (P < 0.05, ANOVA; post hoc test lsd). Values are indicated ± se. n = 4.

	Control	50 μm Cd	100 μm Cd
A (μmol CO₂ m^-2 s^-1)	22.5 ± 1.2	16.1 ± 1.0^b	9.2 ± 2.0^c
A (μmol CO₂ g chlorophyll^-1 s^-1)	63 ± 3^a	61 ± 4^a	70 ± 8^a
A_max (μmol CO₂ m^-2 s^-1)	36.0 ± 1.7^a	21.0 ± 2.1^b	17.9 ± 2.5^b
E (mmol H₂O m^-2 s^-1)	5.6 ± 0.9^a	5.8 ± 0.6^a	3.6 ± 1.2^a
Γ_{CO2 int} (μbar bar^-1)	40 ± 1^a	40 ± 1^a	40 ± 2^a
R_dark (μmol CO₂ m^-2 s^-1)	-0.6 ± 0.2^a	-0.5 ± 0.1*	-1.8 ± 0.3^b
CO_{2 int} (μbar bar^-1)	235 ± 11^a	264 ± 9^ab	285 ± 7^b
RuBPCase (μmol CO₂ m^-2 s^-1)	170.2 ± 16^a	71.1 ± 8^b	51.9 ± 8^b
RuBPCase_max/A_max	4.7	3.5	3.5
δA/δ_PPDF (0-150 μmol photons m^-2 s^-1)	0.050	0.050	0.040
δA/δCO_{2 int} (0-200 μbar bar^-1)	0.170	0.068	0.028
Leaf_abs (%; 400-700 nm)	83 ± 2^g	78 ± 3^a	70 ± 2^b
ΔF/F_m	0.28 ± 0.02^g	0.21 ± 0.06^ab	0.13 ± 0.02^b
A/(ΔF/F_m) × Leaf_abs	66.7	59.8	49.5
qP	0.54 ± 0.11^a	0.44 ± 0.09^a	0.35 ± 0.07^a
NPQ	1.7 ± 0.5^a	1.95 ± 0.21^a	3.4 ± 0.20^b
qN	0.76 ± 0.06^a	0.80 ± 0.01^a	0.89 ± 0.09^a
F_v/F_m	0.78 ± 0.04^a	0.78 ± 0.03^a	0.79 ± 0.05^a
F_o	37 ± 6^a	27 ± 2^a	26 ± 4^a
F_m	171 ± 8^a	131 ± 5^b	126 ± 4^b