Table 1.

Photosynthetic parameters of rice with altered OsALMT1 expression.

Parameters Light		Measured 1500 (μmol m-2s-1)>		250 (μmol m-2s-1)		Derived
[CO2]		400 (ppm)		400 (ppm)
	SPAD	A	gs	A	gs	Φ	𝜃	Jmax
OX5_null	30.8 ± 1.5	22.9 ± 5.7	0.49 ± 0.22	11.2 ± 0.8	0.35 ± 0.84	0.32 ± 0.01	0.78 ± 0.07	162 ± 40
OX5	32.4 ± 0.3	17.5 ± 4.1	0.35 ± 0.10	9.7 ± 1.3	0.28 ± 0.83	0.30 ± 0.07	0.85 ± 0.09	117 ± 29
R58_null	30.7 ± 0.9	20.0 ± 6.1	0.41 ± 0.13	10.0 ± 1.3	0.32 ± 0.84	0.30 ± 0.02	0.77 ± 0.12	141 ± 43
R58	31.1 ± 0.4	24.8 ± 5.3	0.60 ± 0.30	11.1 ± 0.5	0.37 ± 0.83	0.33 ± 0.03	0.79 ± 0.05	176 ± 39

Standard photosynthetic parameters were measured on OX5 plants with increased OsALMT4 expression and R58 plants with reduced OsALMT4 expression and their respective null lines. Average of CO₂ assimilation rate (A,μmol CO₂ m^-2s^-1) and stomatal conductance (g_s, mol H₂O m^-2s^-1) from the light response curves is presented as well as biochemical derived parameters (Φ, quantum yield; 𝜃, convexity factor; J_max, theoretical maximum rate of electron transport at saturating light). Gas exchange was measured for the flag leaves of 6-week-old plants grown in a glasshouse (n = 4 biological replicates per genotype). Irradiance intensity and [CO₂] are indicated. One-way analysis of variance (ANOVA) using a general linear model was performed using the function aov in R language to quantify the effects of genotype on different parameters. Differences between means in a pairwise comparison were tested using Tukey’s honestly test with package “predictmeans” (n = 4) and no significant differences were detected between OX5 and OX5_null or between R58 and R58_null.