Table 2.

Differential metabolites of PLR-U and PLR-F were determined by UPLC-MS analysis.

Classification	Compounds	Type	FC	Classification	Compounds	Type	FC
amino acids and derivatives	L-Serine	Up	19.815	flavone	3,4,2′,3′,4′,6′,alpha-Heptahydroxychalcone 2′-glucoside	Down	0.188
	L-Tryptophan	Up	5.974		(2S)-Naringenin	Up	5.134
	L-Threonine	Up	4.126		Naringeninchalcone	Up	3.392
	L-(+)-Aspartic acid	Down	0.358		5,3′,4′,5′-Tetrahydroxy-6,7-dimethoxyflavone	Up	3.296
terpenoids	Mudanpioside J	Down	0.179		Catechin	Up	2.801
plant polyphenol	Protocatechuic acid	Down	0.209		Quercetin	Up	2.437
	Protocatechuic aldehyde	Up	2.176		Naringenin trimethyl ether	Up	2.429
sugars	1,3,6-Trigalloylglucose	Up	2.985	organic acids	Syringic acid	Up	5.994
lipids	(12Z)-9,10,11-trihydroxyoctadec-12-enoic acid	Up	3.240		Citric acid	Down	0.385

*, metabolites detected in PLR-F but not in PLR-U. #, metabolites detected in PLR-U but not in PLR-F.