Comprehensive Characterization of Extractable Phenolic Compounds by UPLC-PDA-ESI-QqQ of Buddleja scordioides Plants Elicited with Salicylic Acid

Table 2

Accumulation levels of phytochemical compounds in Buddleja scordioides plants preconditioned at 25°C.

No.	Compound	rt (min) PDA	rt (min) QqQ	λmax (nm)	m/z^−	Transitions m/z^−	Precondition content (µg/g dry sample)		value
							Initial	14 days
Hydroxybenzoic acids
(1)	Shikimic acid	1.50	2.35	297.53	173.18	111.07, 93.06	1.85	4.02 (↑2.17)	0.0124
(2)	Protocatechuic acid	5.99	6.80	293.53	153.15	109.05, 91.04	0.02	0.29 (↑14.5)	0.2936
(3)	4-Hydroxybenzoic acid	8.05	8.82	254.53	137.04	93.05, 65.09	0.16	0.31 (↑1.93)	0.4037
(4)	Vanillic acid	9.04	9.82	294.53	167.18	152.18, 123.09	0.19	0.36 (↑1.89)	0.4701
(5)	Syringic acid	9.31	10.06	273.53	197.21	182.05, 153.11	0.07	0.08 (↑1.14)	0.1924
Hydroxycinnamic acids
(6)	Quinic acid	1.51	2.28	--	191.20	93.06, 85.06	6.04	13.65 (↑2.25)	0.0053
(7)	Chlorogenic acid	7.51	8.30	324.34	353.34	191.06, 85.05	0.00	0.02 (↑)	0.1403
(8)	Caffeic acid	9.09	9.85	322.53	179.19	135.08, 89.09	1.84	1.14 (↓1.61)	0.0345
(9)	Coumaric acid	11.07	11.79	308.53	163.24	119.08, 98.07	0.16	0.24 (↑1.50)	0.3354
(10)	Sinapic acid	11.65	12.36	323.53	223.24	164.06, 149.04	0.11	0.09 (↓1.22)	0.2171
(11)	Ferulic acid	11.73	12.43	322.53	193.24	178.07, 134.04	0.29	0.28 (↓1.03)	0.4865
(12)	4,5-Dicaffeoylquinic acid	11.75	12.45	324.53	515.43	353.20, 179.06, 173.01	0.00	0.00 (↓)	0.2723
Xanthones
(13)	Mangiferin	8.83	9.62	317.53	420.89	332.02, 300.99	0.03	0.02 (↓1.5)	0.0022
Flavonols
(14)	Rutin	10.86	11.62	353.53	609.28	300.24, 271.13	0.02	0.00 (↓)	0.0020
(15)	Isoquercitrin	11.34	12.10	353.53	463.36	300.42, 271.11	5.78	0.75 (↓7.70)	0.2829
(16)	Quercetin	15.25	16.01	370.53	301.20	179.04, 151.02	0.76	1.10 (↑1.44)	0.1062
(17)	Kaempferol	17.16	17.89	363.53	285.22	185.02, 151.02	0.02	0.01 (↓2.00)	0.0021
Flavanones
(18)	Naringin	12.07	12.82	282.53	579.32	271.12, 151.02	0.05	0.01 (↓5.00)	0.0022
(19)	Naringenin	16.86	17.53	288.53	271.28	151.04, 119.06	0.06	0.09 (↑1.5)	0.0026
Flavones
(20)	Linarin	12.43	13.22	329.53	591.54	283.23, 268.10	11.31	3.33 (↓3.39)	0.0498
(21)	Luteolin	15.08	15.85	347.53	285.21	151.05, 133.04	0.34	0.72 (↑2.11)	0.0190
(22)	Acacetin	16.08	17.03	333.53	283.23	268.10, 211.10	0.00	3.69 (↑)	0.7988
(23)	Apigenin	16.68	17.38	335.53	269.27	148.27, 177.04	0.12	0.65 (↑5.41)	0.0132

Statistical differences vs initial precondition content of compounds by Dunnett test (); rt denotes retention time.