Analysis of Phenolic Acids of Jerusalem Artichoke (Helianthus tuberosus L.) Responding to Salt-Stress by Liquid Chromatography/Tandem Mass Spectrometry
Table 2
Concentration of total phenolics and phenolic compounds in H. tuberosus leaves (cv. NanYu).
Phenolic compounds
Concentrationa (mg/g dry weight)
Caffeoylquinic acid (peak 2)b
0.063 ± 0.008d
3-o-Caffeoylquinic acid
7.752 ± 2.872b
Caffeoylquinic acid (peak 4)b
0.538 ± 0.081d
Caffeic acid
0.098 ± 0.052d
p-Coumaroyl-quinic acid
0.153 ± 0.061d
Feruloylquinic acid
0.527 ± 0.199d
3,4-Dicaffeoylquinic acid
0.618 ± 0.215d
3,5-Dicaffeoylquinic acid
4.900 ± 1.492c
Caffeoyl glucopyranosec
0.001 ± 0.319d
1,5-Dicaffeoylquinic acid
1.733 ± 0.567d
Isorhamnetin glucosided
0.348 ± 0.057d
4,5-Dicaffeoylquinic acid
5.633 ± 2.990bc
Kaempferol glucuronided
0.186 ± 0.034d
Kaempferol-3-o-glucosided
1.020 ± 0.379d
Total phenolicse
23.570
Total phenolicsf
30.159 ± 4.410a
Values are expressed as mean ± SD of triplicate measurements; the means in a column followed by the same letters represent values that are not significantly different according to Duncan’s test (); bquantified as 3-o-caffeoylquinic acid; cquantified as caffeic acid; dquantified as glucoside; esum of the individual phenolic compounds; and fquantified as gallic acid equivalents.