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Table 2 Identification of the main POD inhibitors from Excoecaria leaves by UPLC-DAD-QTOF-MS/MS

From: In planta high levels of hydrolysable tannins inhibit peroxidase mediated anthocyanin degradation and maintain abaxially red leaves of Excoecaria Cochinchinensis

Fractiona

Compound No.b

Rt(min)

Molecular Formulac

Molecular Mass

△mass (ppm)

m/z

Putative Namec

[M-H]−

Fragment Ions

F1

1

0.509

C13 H16 O10

332.0754

3.05

331.0682

151.0030; 169.0135; 211.0233; 331.0616

Galloyl hexoside [49] (Monogalloylglucose)

2

0.726

C13 H16 O10

332.0745

0.59

331.0673

151.0032; 169.0135; 211.0235; 331.0642

Galloyl hexoside [49] (Monogalloylglucose)

F2

3

0.517

C14 H16 O10

344.0748

1.41

343.0676

125.0250; 169.0137; 191.0552; 343.0642

Galloyl quinic acid [49]

4

0.859

C14 H16 O10

344.0749

1.49

343.0676

127.0398; 169.0136; 191.0549; 343.0642

Galloyl quinic acid [49]

F13

5

1.629

C8 H8 O5

184.0375

1.99

183.0303

78.0112;124.0168; 153.0219; 168.0070

Methyl gallic acid

6

1.724

C41 H28 O27

952.0814

0.38

951.0738

300.9991; 461.0359; 583.0310; 933.0622

Ellagitannin

(HHDP derivative [49])

7

1.855

C55 H28 O26

1104.0936

0.76

1103.0859

300.9992; 445.0416; 631.0566; 951.0722

Ellagitannin [50]

(HHDP derivative)

8

2.002

C56 H30 O26

1118.1099

6.57

1117.1012

166.9995; 300.9995; 461.0346; 965.0902

Ellagitannin [50]

(HHDP derivative)

F14

9

1.608

C8 H8 O5

184.0373

0.5

183.0560

78.0109;124.0164; 153.0175; 168.0058

Methyl gallic acid

10

1.612

C41 H28 O27

952.0819

0.16

951.0747

169.0143; 300.9993; 461.0390; 933.0627

Ellagitannin

(Galloyl HHDP derivative [49])

11

1.862

C42 H30 O27

966.097

0.51

965.0897

300.9994; 461.0401; 805.9860; 933.0648

Ellagitannin [50]

(HHDP derivative)

12

1.885

C34 H28 O22

788.1076

0.42

787.1003

169.0143; 465.0666; 573.0867; 617.0789

Tetragalloyl hexoside

(Tetragalloyl glucose) [49]

13

2.017

C41 H32 O26

940.1182

3.83

939.1110

125.0247; 169.0146; 465.0682; 617.0791

Pentagalloyl hexoside

(Pentagalloyl glucose) [49]

  1. a The fractions were of high inhibitory efficacy on POD as indicated in Fig. 5B
  2. b The compound numbers represent the main peaks as indicated in Fig. 5D-G
  3. c The molecular formula and the compounds were deduced based on searching the m/z and MS/MS spectra of negative modes in “METLIN” database
  4. HHDP—Hexahydroxydiphenoyl unit
  5. Rt—Retention time
  6. [M-H]−—Molecular ion
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BMC Plant Biology

ISSN: 1471-2229

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