Table 4. Leaf gas exchange, chlorophyll fluorescence parameters, and relative Rubisco amount per leaf surface of ambient air-grown Col-0, Compl-HPR1-13, Compl-T335A-23, Compl-T335D-4, and hpr1-1.

A_n, R_dark, the CO₂ compensation point, g_s, Tr, photosynthetic ETR, NPQ, qP, the Fv/Fm ratio, and relative Rubisco large subunit amount per leaf surface values (with the value of Col-0 set to 1) of 6-week-old Col-0, hpr1-1, Compl-HPR1-13, Compl-T335A-23, and Compl-T335D-4 rosettes. Values are means ± sd (n = 3 independent plants). Asterisks indicate significant differences from Col-0 as determined by Student’s t test (*P < 0.05 and **P < 0.01).

Parameter	Col-0	Compl-HPR1-13	Compl-T335A-23	Compl-T335D-4	hpr1-1
An (µmol CO2 m−2 s−1)	8.05 ± 1.20	8.62 ± 0.48	8.55 ± 0.63	6.22 ± 0.90*	4.85 ± 1.33**
Rdark (µmol CO2 m−2 s−1)	−0.72 ± 0.10	−0.72 ± 0.37	−0.59 ± 0.12	−0.61 ± 0.15	−0.45 ± 0.11**
CO2 compensation point (µmol mol−1 CO2)	72.9 ± 3.0	68.1 ± 5.3	67.0 ± 3.7	73.1 ± 2.8	110.9 ± 11.8**
gs (mmol H2O m−2 s−1)	0.23 ± 0.06	0.21 ± 0.04	0.16 ± 0.05	0.16 ± 0.5	0.16 ± 0.06
Tr (mmol H2O m−2 s−1)	2.17 ± 0.84	3.38 ± 0.40	2.29 ± 0.51	2.43 ± 0.51	2.55 ± 1.02
ETR	56.4 ± 4.6	55.8 ± 4.7	56.8 ± 1.4	44.31 ± 5.4*	38.9 ± 6.6**
NPQ	0.56 ± 0.10	0.47 ± 0.06	0.75 ± 0.36	0.83 ± 0.27	1.53 ± 0.34**
qP	0.75 ± 0.03	0.73 ± 0.04	0.70 ± 0.08	0.62 ± 0.04**	0.64 ± 0.07*
Fv/Fm	0.796 ± 0.012	0.790 ± 0.019	0.801 ± 0.008	0.791 ± 0.009	0.779 ± 0.008
Relative Rubisco amount per leaf surface (arbitrary units)	1 ± 0.05	0.94 ± 0.09	0.96 ± 0.03	0.90 ± 0.08	0.72 ± 0.07*