Table 4.

Summary of the quantified phenolic, sugar, or combined effect of both inducers, released from tobacco and maize as conditioned by wounding, organ/tissue types, or age.

Plant Condition	vir-inducers		6-month-old tobacco			2-month-old maize		2-week-old (young) tobacco
			Stem	Midrib	Leaf	Midrib	Leaf	Stem	Midrib	Leaf
Wounded	Phenol	Conc.	10-100 µM	10-100 µM	5-10 µM	1-5 µM	5-10 µM	0-0.1 µM	0-0.1 µM	0-0.1 µM
		Peak length	>18 days	>18 days	>18 days	<11 days	<7 days	<7 days	<7 days	<7 days
	Sugar	Conc.	0.5-1 mM	0.5-1 mM	0.1-0.5 mM	0.1-0.5 mM	0.5-1 mM	0-0.1 mM	0-0.1 mM	0.1-1 mM
		Peak length	<18 days	<18 days	<18 days	<18 days	<18 days	>7 days	>7 days	>7 days
	Induction potential		0.1	0.03	0.08	0.01	0.01	0.01	0.02	0.01
Unwounded	Phenolic		ND	ND	ND	ND	ND	ND	ND	ND
	Sugar		ND	ND	ND	ND	ND	ND	ND	ND

The concentration and duration of phenol or sugar exudation is quantified according to GFP response ( Figures S4–6 ) with Figure 1 as the reference. The induction potential is presented as how AB650^wt with wt signal sensitivity responded to plant tissue without exogenous inducers ( Figures S4–6 ), normalized to the maximum induction level seen from YHL301^ss across all the treatment groups. The vir-inducers exuded by unwounded plant tissue tobacco seedlings were not detected (ND) by AB650^wt or YHL301^ss.