Table 7. Effect of 100 mM NaCl with or without glutathione, ascorbic acid, or amino acid mixture on photosynthetic efficiency of two barley cultivars at the seedling stage.

Treatments	Photosynthetic efficiency
	G124	G119
Control	0.75±0.003	0.77±0.001
NaCl	0.74±0.002	0.76±0.001
Glutathione	0.76±0.002	0.75±0.001
Glutathione plus salt	0.77±0.001	0.72±0.002
Ascorbic acid	0.74±0.011	0.77±0.005
Ascorbic acid plus salt	0.75±0.001	0.78±0.001
Amino acid mixtures	0.76±0.003	0.78±0.001
Amino acids plus salt	0.73±0.003	0.78±0.002
F	9.06	1844.2
P	**	**
LSD	0.011	1.32

^**Highly significant at P≤0.01.