Non-targeted and targeted metabolomics profiling of tea plants (Camellia sinensis) in response to its intercropping with Chinese chestnut

Table 2 The amino acids based on the target metabolomics in the tea samples of 80 T (intercropping) vs. T (monoculture)

Name	Abbreviation	MEAN 80 T (nmol/g)	MEAN T (nmol/g)	VIP	P value	Fold change	Log_Fold change	Flavor or not
L-Methionine	Met	77.24	60.68	1.07	0.19	1.27	0.35	sweet
L-Proline	Pro	175.52	124.45	1.19	0.15	1.41	0.50	sweet, bitter
L-Alanine	Ala	1786.97	1375.01	1.31	0.03	1.30	0.38	sweet
L-Threonine	Thr	4539.63	3356.81	1.31	0.09	1.35	0.44	sweet
L-Serine	Ser	13,202.69	7802.77	0.73	0.22	1.69	0.76	sweet
L-Asparagine	Asn	3532.84	1069.28	1.49	0.06	3.30	1.72	umami
L-Glutamic acid	Glu	18,283.39	12,094.54	0.66	0.41	1.51	0.60	umami
L-Aspartic acid	Asp	12,427.77	8698.41	0.64	0.46	1.43	0.51	umami
L-Glutamine	Gln	17,306.94	9891.39	0.75	0.21	1.75	0.81	umami
L-Phenylalanine	Phe	293.31	291.15	0.21	0.95	1.01	0.01	floral aroma
L-Glycine	Gly	777.64	623.06	1.11	0.17	1.25	0.32	floral aroma
L-Tryptophan	Trp	851.86	769.41	0.70	0.57	1.11	0.15	bitter
L-Arginine	Arg	3785.44	3147.93	0.74	0.59	1.20	0.27	bitter, sweet
L-Histidine	His	2696.35	1439.46	1.33	0.18	1.87	0.91	bitter
L-Valine	Val	1319.02	1220.96	0.61	0.75	1.08	0.11	bitter, sweet
L-Tyrosine	Tyr	6.37	3.61	1.29	0.06	1.76	0.82	bitter
L-Lysine	Lys	783.85	470.56	1.30	0.06	1.67	0.74	bitter, sweet
4-Aminobutyric acid	GABA	1380.00	854.07	1.54	0.01	1.62	0.69	no
L-Citrulline	Cit	314.20	184.52	1.00	0.30	1.70	0.77	no
β-Alanine	β-Ala	15.95	7.85	1.07	0.04	2.03	1.02	no
L-Ornithine	Orn	320.31	173.38	0.39	0.69	1.85	0.89	no
4-Hydroxyproline	4-Hyd	56.33	214.33	0.90	0.37	0.26	−1.93	no
1-Methyl-L-histidine	1-Mhis	107.07	237.82	0.67	0.41	0.45	−1.15	no
3-Methyl-L-histidine	3-Mhis	115.18	133.47	0.35	0.53	0.86	−0.21	no

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