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Table 2 VOC composition of fruits of RH and RHB at different ripening stages.

From: Study of 'Redhaven' peach and its white-fleshed mutant suggests a key role of CCD4 carotenoid dioxygenase in carotenoid and norisoprenoid volatile metabolism

       RH      RHB   
Class Compound Id. RI S1 S2 S3 Br S4 S1 S2 S3 Br S4
Aromatic aa-related Benzaldehyde MS, KI, Std 960 16.7 4.4 461.2 199.1 72.6 11.2 0.2 223.3 242.7 49.7
  Benzenacetaldehyde MS, KI, Std 1042 0.4 0.3 18.9 30.2 9.9 0.3 n.d. 18.1 13.1 3.8
  Benzoic acid MS, KI 1164 1.1 0.3 69.5 46.4 39.7 1.0 0.1 35.3 49.6 34.8
  4-vinylphenol MS, KI 1219 n.d. 0.1 21.1 16.7 14.8 n.d. n.d. 11.8 29.3 19.8
  Chavicol MS, KI 1253 n.d. n.d. 0.7 6.7 40.0 n.d. n.d. n.d. 7.6 10.5
  Eugenol MS, KI, Std 1358 n.d. n.d. 12.6 85.6 158.4 n.d. n.d. 6.4 71.0 68.4
  Vanillin MS, KI, Std 1394 0.2 n.d. 10.5 13.6 21.5 1.4 n.d. 11.1 16.5 13.7
Branched chain aa-related Iso valeric acid MS, KI 828 n.d. n.d. 115.2 93.3 71.9 n.d. n.d. 110.1 77.4 28.4
Fatty acid-related 2-hexen-1-ol-E MS, KI 854 0.8 0.1 123.7 29.7 8.2 0.5 10.0 82.3 31.8 12.7
  3-hexen-1-ol-acetate-Z MS, KI 1005 n.d. n.d. 7.7 11.0 9.7 n.d. 3.3 4.6 10.0 7.8
  2-hexen-1-ol acetate-E MS, KI 1015 n.d. n.d. 5.2 31.7 9.7 n.d. 0.3 n.d. 22.8 n.d.
  Dodecane MS, KI 1189 n.d. n.d. 25.2 41.7 28.6 n.d. 0.3 27.6 53.1 26.0
  Dodecanoic acid MS, KI 1556 n.d. n.d. 41.6 195.0 162.8 n.d. n.d. 8.7 24.5 19.0
  Tetradecanoic acid MS, KI 1758 n.d. n.d. 22.6 42.0 46.2 n.d. n.d. 9.1 29.8 10.0
  Unknown Fatty acid-rel.-1   1957 0.4 0.4 286.7 441.3 451.0 0.5 0.1 214.6 397.2 238.6
  Unknown Fatty acid-rel.-2   2103 0.3 0.1 69.6 39.5 3.1 0.2 0.2 100.8 102.0 14.3
  Methyl linoleate MS, KI 2127 0.3 0.4 125.3 160.8 206.8 0.6 0.1 123.8 209.5 161.6
Furan-related 2.5-Furandione MS, KI 833 3.2 12.2 2007.3 2195.3 3009.0 3.3 n.d. 1668.4 3930.2 2313.2
  3-methyl-2.5-furandione (put.) MS 941 0.1 0.2 389.9 387.9 197.1 0.1 0.1 438.9 940.4 230.2
  dihydro-2.5-furandione (put.) MS 1022 0.4 0.4 144.9 210.7 278.8 0.3 n.d. 131.9 208.4 278.9
  3.4-dimethyl-2.5-furandione (put.) MS 1038 n.d. n.d. 13.4 11.4 4.6 n.d. n.d. 17.2 47.3 41.6
  Unknown Furan-related   1110 n.d. n.d. 19.6 25.8 18.8 n.d. n.d. 8.8 20.4 12.6
Lactones γ-hexalactone MS, KI 1043 n.d. n.d. 16.5 31.2 119.5 n.d. 0.1 4.0 12.7 81.5
  δ-deca-2.4-dienolactone (put.) MS 1453 n.d. n.d. 2.6 2.1 27.8 n.d. 6.1 n.d. n.d. 5.2
  δ -decalactone MS, KI 1493 n.d. n.d. 10.7 1.8 91.0 n.d. n.d. n.d. n.d. 17.3
Monoterpenes Linalool MS, KI. Std 1090 n.d. n.d. 7.2 14.9 101.8 n.d. n.d. n.d. n.d. 21.8
  Carvone MS, KI 1244 n.d. n.d. n.d. 3.0 n.d. n.d. 0.1 1.1 n.d. n.d.
  8-Hydroxylinalool MS, KI 1336 n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d. n.d.
Norisoprenoids 3-hydroxy-β-damascone (put.) MS 1618 n.d. n.d. 24.8 65.7 116.8 n.d. n.d. 69.9 221.8 258.0
  Unknown norisoprenoid-1   1658 n.d. n.d. 1.0 11.5 31.3 n.d. 1.3 15.0 48.0 83.1
  3-hydroxy-5.6-epoxy-β-ionone MS, KI 1683 0.1 n.d. 14.1 12.1 18.6 n.d. n.d. 27.1 52.3 66.1
  4-hydroxy-3.5.6-trimethyl-4-(3-oxo-1-butenyl)-2-cyclohexen-1-one. (put.) MS 1785 0.1 n.d. 43.4 60.4 144.8 0.1 n.d. 213.4 259.5 410.2
  Unknown norisoprenoid-2   2220 n.d. 0.1 183.9 211.7 221.4 n.d. 0.3 112.3 183.0 87.1
  Unknown norisoprenoid-3   2244 n.d. 0.1 248.1 282.1 271.3 n.d. 0.1 157.8 258.9 125.2
Others 1H-pyrazole (put.) MS 1036 n.d. n.d. 110.7 120.5 74.3 n.d. 0.3 133.4 284.9 60.6
  Pentanoic acid-4-oxo (put.) MS 1143 n.d. 0.1 28.7 18.8 12.2 n.d. n.d. 23.8 38.0 9.8
  Salicylic acid (put.) MS 1294 0.3 n.d. 74.6 98.0 74.5 0.2 n.d. 82.5 120.8 50.6
  2-propanoic acid 3-phenyl-E (put.) MS 1622 2.0 2.3 457.1 362.7 263.5 1.3 n.d. 366.7 463.0 124.5
  Unknown-1   1829 0.1 0.2 118.0 57.0 7.5 0.2 0.1 120.6 122.0 6.5
  Unknown-2   1906 n.d. 0.1 120.4 232.5 323.4 n.d. 0.1 99.5 243.0 179.5
  Unknown-3   1894 0.6 0.5 212.1 287.1 236.2 0.5 0.1 178.9 337.1 94.5
  1. Average data of 4 to 8 replicates. Values are in ng/g fresh weight. Id.: identification method (MS, Mass Spectrometry; KI, Kovacs Index; Std, standard compound data). Positive compound identification was obtained by matching both MS and KI or Standard compound data. Otherwise, putative (put.) best compound is listed. RI: retention index. aa: amino acid. n.d.: not detectable.
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