Table 3.

Endogenous hydrogen peroxide (H₂O₂) and salicylic acid (SA) levels in plant leaves of different species and genotypes in stable optimal (laboratory) conditions and under abiotic and biotic stresses.

Genotype	Conditions					References
	Optimal		Stress
	SA	H2O2		SA	H2O2
	(×10−6 M)			(× 0−6 M)
Arabidopsis Ws-0	25	38.00	field	23.0	8	[186]
Arabidopsis lsd1	126	75.00	field	69.0	45	[186]
Arabidopsis eds1	36	37.00	field	25.0	7	[186]
Arabidopsis pad4	42	37.00	field	27.0	7	[186]
Arabidopsis eds1/lsd1	23	33.5	field	24.0	11	[186]
Arabidopsis pad4/lsd1	24	34.0	field	21.0	10	[186]
Arabidopsis Ws-0	14	4000	UV	16	5000	[187]
Arabidopsis lsd1	53	5500	UV	607	30,000	[187]
Arabidopsis eds1	19	2500	UV	54	6000	[187]
Arabidopsis pad4	46	3000	UV	64	12,000	[187]
Arabidopsis eds1/lsd1	25	2000	UV	28	4500	[187]
Arabidopsis pad4/lsd1	29	3800	UV	35	6500	[187]
Arabidopsis Col-0		~40	excess light		80	[13]
Arabidopsis Col-0	552	53	wounding	658	152	[9]
Arabidopsis Col-0	552	57	NAA/SAA	772	71	[9]
Salvia miltiorrhiza		200	SA		~6000	[188]
Salvia miltiorrhiza		200	H2O2		~5000	[188]
Salvia miltiorrhiza		200	SA + catalase		~1000	[188]
Stylosanthes guianensis		120	38°C		500	[189]
Salix sp., Robinia sp., Ailanthus sp.		25,000–45,000	drought		15,000–45,000	[190]
Arabidopsis Col-0		~8	Pseudomonas syringae pv. tomato DC3000		~30	[191]
Phaseolus vulgaris		~150	Pseudomonas syringae pv. phaseolicola		550	[192]
Phaseolus vulgaris		~150	Botrytis cinerea		300	[192]
Lupinus luteus	~5	~150	Fusarium oxysporum f. sp. lupini	14	400	[193]