TABLE 2.

Peak assignments for ¹H NMR spectra of tomato root exudates.

						20 dap [Chitosan] (mg⋅mL–1)
Part of the spectra	dap	Peak number	Compound	Shift (ppm)	H mult.	0	0.1
I	20	13	Leucine/isoleucine	0.94		0.25475	0.17575
I	10-20-30	36	Lactate	1.33	d	0.35685	0.18225
I	20	53	Acetate	1.92	s	4.7895	3.4135
I	10-20-30	62	Malate	2.3	t	0.6217	0.5769
I	10-20-30	64	Malate	2.41		1.725	1.26
II	20-30	80	Methanol	3.36	s	0.34845	0.2379
II	20	99	Raffinose	4.99	d	0.027535	0.03025
II	20	100	Glucose	5.237	d	0.02523	0.035445
II	20	103	Raffinose	5.42	d	0.02462	0.02018
II	20	105	Uracil	5.79	d	0.031275	0.02049
III	20	109	Cinnamic acid/fumaric acid	6.52/6.51	d/s	0.2005	0.15425
III	20	112	p-Aminobenzoic acid	6.82	d	0.0033845	0.0050605
III	20	119	Cinnamic acid	7.43	m	0.049535	0.04216
III	20	120	Uracil	7.52	d	0.00791	0.016235
III	20	121	Cinnamic acid	7.62	dt	0	0.002784
III	20	122	p-Aminobenzoic acid	7.73	d	0.0056825	0.00603
III	20	125	Trigonelline	8.07	m	0.006835	0.01239
III	20-30	129	Formic acid	8.44	m	0.35505	0.1718
III	20	130	Trigonelline	8.82	m	0.028845	0.022265
III	20	131	Trigonelline	9.13	s	0.03144	0.024555

This table includes identified peaks only. Spectra parts I, II, and III are indicated in Supplementary Figure 3. Abbreviations: Dap, days after planting; H mult., H multiplicity; d, doublet; s, singlet; t, triplet; dt, double of triplets; m, multiplet. Treatment abbreviations: 0, Tomato Root Exudates Control; 0.1, Tomato Root Exudates from plants irrigated with 0.1 mg mL^–1 chitosan. Numbers in treatments correspond to the mean of maximum intensity of the peaks (arbitrary units). Bold numbers indicate significant differences (ANOVA, p < 0.05).