Table IV. Bootstrap ratios of metabolites (absolute values) from the two tomato cultivars and the three ripening mutants.

The bootstrap ratios of metabolites were obtained from 3,000 bootstrap samples for the first three principal components. Values denoted in boldface are significant at α = 0.01, while underlined values are significant at α = 0.05.

No.	Metabolite	PC1	PC2	PC3
1	Ala	1.66	1.00	0.66
2	β-Ala	0.95	−1.28	−0.58
3	γ-Aminobutyrate	0.25	−0.54	−1.95
4	Gly	0.40	−2.33	−0.50
5	Ile	−1.54	−2.23	−0.24
6	Phe	−1.35	0.18	−1.56
7	Ser	−1.81	−0.81	−0.80
8	Thr	−1.46	−0.75	0.15
9	Val	−0.57	−2.01	−0.39
10	Asp	−1.90	1.26	0.11
11	Citric acid	1.57	0.12	−0.35
12	Dehydroascorbic acid	1.69	0.08	0.65
13	Glu	−0.84	−0.20	0.60
14	Malic acid	2.13	1.34	0.50
15	Threonic acid	1.31	−1.01	1.33
16	Fru	1.62	0.22	−0.53
17	Glc	1.00	1.42	−1.28
18	Rha	1.38	0.40	−0.31
19	Suc	−0.32	−2.12	−0.57
20	Xyl	2.51	0.05	1.01
21	Myoinositol	1.12	0.07	−0.90
22	Hexadecanoic acid	0.85	3.23	−0.46
23	Octadecanoic acid	1.89	−0.11	0.49