Table II.

Inhibitors used in this study^a

Symbolb	Inhibitor/Reagentc	Target/Effectd	Infiltrate XXO	Spray O3
			μme	μmf
Van	Metavanadate	ATPases	50,000	100,000
Lan	LaCl3	Ca2+ channels	1,000	2,000
Ama	α-Amanitin	Transcription	2.2	4.4
Hba	Herbimycin A	Tyr kinases	1,000	2,000
K25	K252a	Ser/Thr kinases	2.2	4.4
Pep	Pepstatin	Asp proteases	1.0
E-64	E-64	Cys proteases	1.0
VAD	z-VAD-fmk	Caspases	50
PMSF	PMSF	Ser proteases	500
Ion	A23187	Ca2+ ionophore	10
Ca	CaCl2	Increased Ca2+	2,000
Mg	MgCl2	Control	2,000
EGTA	EGTA	Decreased Ca2+	1,000
Gd	Gd(III)Cl3	Ca2+ channels	1,000

^aInhibitors used in this study with their respective abbreviations, concentrations used, and proposed targets.

^bAbbreviations used in the figures for each inhibitor.

^cFull name of all inhibitors and reagents used.

^dProposed inhibitor target or the expected effect of the treatments.

^eConcentrations used for in vitro coinfiltration experiments with XXO as the radical source.

^fConcentrations used for pretreating plants by spraying intact plants with the inhibitor 1 h prior to O₃ exposure.