Table 1.

Leaf Cl⁻ Concentration in different plant species grown with nutrient solutions containing Cl⁻ in the low milli-molar range (4.5–5.0 mM).

	Citrus Cl− Excluder 2	Arabidopsis (Col0) 3	Citrus Cl− Includer 4	Tomato 5	Tobacco 6
Leaf Cl− Concentration (mg·g−1 DW)	5–13	25	30	32	50
Cl− Excess (Respect to micronutrient requirement) 1	25–70	125	150	150	250

¹ Considering 0.2 mg·g⁻¹ DW as the critical Cl⁻ requirement. ² Cleopatra mandarin and Rangpur lime plants (respectively) treated for 30 weeks with a nutrient solution containing 4.5 mM Cl⁻ [18]. ³ Arabidopsis thaliana (Columbia ecotype) treated for 5 weeks with a nutrient solution containing 5.0 mM Cl⁻ [20]. ⁴ Carrizo citrange plants treated for 30 weeks with a nutrient solution containing 4.5 mM Cl⁻ [18]. ⁵ Tomato plants treated for 6 weeks with a nutrient solution containing 5 mM Cl⁻ [19]. ⁶ Tobacco plants treated for 6 weeks with a nutrient solution containing 5 mM Cl⁻ [2].