Table 4.

The effect of salinity Amax, Gross Respiration and Carboxylation efficiency parameters of tolerant and sensitive ecotypes of quinoa, obtained from A/Ci curves (Figure 5).

Ecotype	NaCl	CONDITION	Amax		Sig.	Gross Resp.		Sig.	Carbox.		Sig.
	M		µmol CO2 m−2 s−1	± SD		µmol CO2 m−2s−1	± SD		Efic.	± SD
Amarilla	0	R	13.8	1.03	cd	−4.09	1.39	ab	0.135	0.036	d
Amarilla	0.4	R	12.8	0.94	c	−4.8	1.15	a	0.117	0.034	d
Amarilla	0	nR	21.49	2.93	f	−2,9	1.12	cd	0.127	0.026	d
Amarilla	0.4	nR	16.05	2.46	e	−3.42	1.3	bc	0.071	0.033	b
Hueque	0	R	13.75	2.82	cd	−3.25	1.11	cd	0.096	0.026	c
Hueque	0.4	R	7.3	0.82	a	−3.2	0.31	cd	0.023	0.005	a
Hueque	0	nR	14.67	3.2	de	−1.95	0.95	e	0.07	0.027	b
Hueque	0.4	nR	10.31	1.62	b	−2.51	0.98	de	0.036	0.008	a

R: with stomatal restriction; nR no stomatal restriction; Amax: Maximum assimilation rate; Gross resp.: Gross respiration (dark and photorespiration); Carbox. Efic.: Carboxylation efficiency; Different letters indicate Significance level (p ≤ 0.01).