Table 3. Comparison of phenylpropanoid content of leaves by buckwheat varieties (μg/g dry weight)¹⁾

Compounds	USA	Japan HS4251	Daewon	Daegwan	Daesan	Yangjul
Gallic acid	11.98±0.06^c2)	7.79±0.65^d	18.64±1.46^ab	17.31±0.45^bc	10.31±0.70^cd	19.46±0.62^a
Chlorogenic acid	226.20±9.61^b	178.38±1.71^c	217.45±6.82^bc	424.92±9.69^a	175.36±4.23^c	192.57±2.47^d
Caffeic acid	22.87±1.16^e	27.26±1.18^d	35.66±1.08^c	55.62±2.82^a	22.06±0.68^e	41.03±1.19^b
(-)-Epicatechin	24.727±7.02^d	35.36±6.65^b	27.89±9.35^c	97.37±8.06^a	24.07±4.16^d	33.5±4.12^b
p-Coumaric acid	18.56±1.94^a	12.27±0.68^bc	10.31±0.45^e	13.92±0.76^b	11.29±0.71^d	9.98±0.23^e
Ferulic acid	6.72±0.18^f	8.04±0.17^d	9.10±0.38^c	13.11±1.09^a	7.62±0.31^e	10.60±0.37^b
Benzoic acid	77.49±3.24^a	52.81±6.40^c	46.03±0.38^e	48.77±1.32^d	67.71±8.61^ab	65.60±5.52^b
Rutin	9,953.39±173.63^b	8,494.52±81.91^bc	9,305.33±338.88^b	12,535.85±431.43^a	9,900.59±340.66^b	8,937.03±385.76^bc
trans-Cinnamic acid	6.55±0.06^a	1.19±0.06^de	0.79±0.03^f	1.25±0.08^d	2.66±0.12^b	1.66±0.07^c
Quercetin	521.93±13.96^c	328.35±2.54^f	479.93±14.65^d	2,199.77±60.53^a	417.84±10.15^e	747.87±15.59^b
Kaempferol	16.77±2.38^ab	4.51±0.56^e	11.71±0.87^d	17.03±2.33^a	14.81±1.90^c	16.77±1.39^ab
Total	10,887.25±204.27^b	9,150.48±83.20^d	10,161.84±362.40^bc	15,424.90±479.62^a	10,654.32±350.75^bc	10,076.08±363.24^bc

Buckwheat leaves were freeze-dried and extracted with 80% methanol at 60°C.
Means±SD (n=3) with different letters at the same row are significantly different among buckwheat varieties (p⟨0.05).