Table 1.

Paeoniflorin and paeonol contents determined by different drying methods.

Sample	Compound	Freeze drying	Air drying	Rate of change (%)
P. ostii root phloem	Paeoniflorin (mg/g)	18.72 ± 1.24	3.51 ± 0.54	−81.27
	Paeonol (mg/g)	5.92 ± 0.34	14.57 ± 1.09	146.05
P. ostii root xylem	Paeoniflorin (mg/g)	21.27 ± 1.12	11.4 ± 0.81	−46.41
	Paeonol (mg/g)	1.86 ± 0.16	6.48 ± 0.27	247.9
P. lactiflora root	Paeoniflorin (mg/g)	44.6 ± 3.31	7.74 ± 0.32	−82.65
	Paeonol (mg/g)	0.00	0.00	/