Table II.

Low (0.2 mm) vs. normal (2.0 mm) Ca²⁺ with eight inducers

Inducer	Glycinebetainea 0.2 mm Ca2+		Glycinebetaine 2.0 mm Ca2+		Ratiob 0.2/2.0 mm Ca
	μmol g−1
None	0.90	1.14	0.82	1.17	1.02
PEG	4.60	4.42	4.12	4.48	1.04
H2O2	2.86	2.62	2.68	2.49	0.93
CuHP	3.01	2.64	2.50	3.04	1.10
ABA	3.68	4.31	4.95	3.87	0.93
Salicylate	3.08	2.63	2.27	2.08	1.32
MgCl2	4.62	5.25	1.40	1.64	3.22
NaCl	5.02	5.70	7.26	7.84	0.71
KCl	4.90	5.22	8.78	7.07	0.64

The concentrations were NaCl and KCl at 150 mm, MgCl₂ at 15 mm, ABA at 50 μm, salicylate at 1.5 mm, CuHP at 0.5 mm, PEG at 15% (w/v), and H₂O₂ at 15 mM. All inducers were added to the growth medium, which was changed on d 2. Leaves were harvested on d 4 and stored frozen until analyzed.

^a Results with duplicate leaf samples shown. 

^b Ratio, based on the average for the two determinations.