Table 3.
Percentages of volatile ornagic compounds in different citrus varieties.
| Compound | LRI HP-5MS | Hamlin sweet orange | Madam vinous sweet orange | Carrizo citrange | Valencia sweet orange | Ruby red grapefruit | Duncan grapefruit | Volkamer lemon | Mexican lime | Palestine sweet lime | Sour orange | Poncirus trifoliata | Citrus latipes | Alemow | Severinia buxifolia |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (E)-2-hexenal | 836 | 0.6 ± 0.3ab | nd | 0.6 ± 0.6ab | 2.3 ± 4.4ab | 1.6 ± 1.4ab | nd | 3.2 ± 0.9ab | 2.1 ± 2.9ab | 1.1 ± 0.3ab | 0.1 ± 0.2ab | 6.8 ± 6.7a | 0.1 ± 0.1ab | 0.3 ± 0.4ab | 0.1 ± 0.0ab |
| α-thujene | 911 | 0.1 ± 0.0b | 0.1 ± 0.13b | nd | nd | 0.3 ± 0.1a | nd | nd | nd | nd | nd | nd | nd | 0.1 ± 0.1ab | nd |
| α-pinene | 921 | 1.2 ± 0.3a | 0.3 ± 0.1cde | nd | 0.8 ± 0.1abc | 1.1 ± 0.3ab | 0.5 ± 0.1bcde | 0.2 ± 0.1de | nd | 0.1 ± 0.0de | 0.1 ± 0.1e | nd | 0.7 ± 0.6abcd | 0.4 ± 0.4cde | nd |
| sabinene | 967 | 37.9 ± 2.5a | 5.1 ± 1.1cd | nd | 20.8 ± 4.3b | 15.1 ± 12.4bc | 20.6 ± 2.2b | 5.7 ± 0.4cd | nd | nd | 0.2 ± 0.1d | nd | 0.4 ± 0.3d | 0.1 ± 0.1d | nd |
| β -pinene | 974 | 1.0 ± 0.1bc | 0.2 ± 0.1d | nd | 0.7 ± 0.1c | 1.0 ± 0.2bc | 1.3 ± 0.0ab | nd | nd | nd | 1.5 ± 0.4a | nd | nd | 0.3 ± 0.2d | nd |
| β -myrcene | 983 | 3.1 ± 0.3bc | 1.3 ± 0.1cde | 0.9 ± 0.2cde | 2.8 ± 0.5bcd | 4.3 ± 1.1b | 1.4 ± 0.4bcde | 1.1 ± 0.1cde | 0.1 ± 0.1de | 0.8 ± 0.2cde | 8.5 ± 2.3a | 7.4 ± 2.7a | 1.1 ± 0.4cde | 0.7 ± 0.3cde | nd |
| α-phellandrene | 1005 | 0.2 ± 0.0b | nd | nd | 0.3 ± 0.0b | nd | nd | nd | nd | nd | nd | nd | 3.1 ± 0.9a | nd | nd |
| 3-carene | 1008 | 8.0 ± 0.5b | 3.5 ± 0.3c | 1.8 ± 0.6d | 10.2 ± 0.9a | nd | nd | nd | tr | nd | 0.2 ± 0.1e | nd | nd | 3.5 ± 0.3d | nd |
| d-limonene | 1033 | 2.6 ± 0.6ef | 55.3 ± 2.4a | 40.0 ± 3.1cd | 4.3 ± 1.7ef | 6.9 ± 2.4ef | 8.4 ± 7.8ef | 52.5 ± 0.8ab | 10.8 ± 4.7e | 47.0 ± 1.8bc | nd | 0.3 ± 0.2f | 10.5 ± 1.3e | 31.4 ± 1.9d | 2.7 ± 2.7ef |
| β-phellandrene | 1042 | nd | 0.6 ± 0.1b | nd | 0.1 ± 0.1b | nd | nd | nd | nd | nd | nd | nd | 11.4 ± 2.6a | 0.3 ± 0.1b | nd |
| ocimene | 1050 | 4.4 ± 0.5ab | 1.8 ± 0.5bcdef | 3.3 ± 2.2abcde | 5.7 ± 1.9a | 4.1 ± 0.8abc | 1.7 ± 1.7bcdef | 3.8 ± 0.3abcd | 0.7 ± 0.4def | 1.0 ± 0.1cdef | 3.4 ± 1.3abcde | 0.8 ± 0.5def | 0.3 ± 0.1ef | 1.0 ± 0.2cdef | nd |
| α-terpinene | 1066 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 3.4 ± 1.4a | nd |
| t-sabinene H2O | 1084 | 0.7 ± 0.1bc | 0.3 ± 0.1bc | nd | 0.2 ± 0.2bc | 0.8 ± 0.1b | 1.6 ± 1.0a | 0.1 ± 0.0bc | nd | nd | nd | nd | nd | 0.1 ± 0.0c | nd |
| δ-terpinolene | 1098 | 1.0 ± 0.1b | 0.3 ± 0.1c | 0.2 ± 0.1c | 1.2 ± 0.2b | nd | nd | nd | nd | nd | nd | nd | 2.2 ± 0.7a | 0.1 ± 0.0c | nd |
| linalool | 1114 | 11.2 ± 0.7bcd | 4.1 ± 1.4cd | 0.3 ± 0.2d | 8.1 ± 1.6bcd | 7.4 ± 2.0bcd | 18.1 ± 14.3b | 3.3 ± 0.1cd | 0.1 ± 0.1d | 12.8 ± 0.5bc | 68.3 ± 1.4a | nd | 7.6 ± 1.8bcd | 1.5 ± 0.1cd | 0.3 ± 0.3d |
| citronellal | 1172 | 0.5 ± 0.1e | 3.8 ± 0.5de | 0.7 ± 0.4 | 9.1 ± 2.0cd | 30.3 ± 4.3a | 16.1 ± 5.2b | 19.8 ± 0.3b | 0.6 ± 0.2e | 32.6 ± 2.2a | 0.1 ± 0.0e | nd | 0.9 ± 0.4e | 13.9 ± 5.2bc | nd |
| (E,Z)-2,4-nonadienal | 1222 | 3.2 ± 1.3abc | 0.5 ± 0.3bc | nd | 1.5 ± 0.7bc | 6.2 ± 1.8a | 5.6 ± 2.6a | 1.8 ± 0.7bc | 0.6 ± 0.2bc | 0.5 ± 0.2bc | 3.5 ± 0.5ab | 3.1 ± 2.2abc | 0.5 ± 0.2bc | 1.1 ± 1.1bc | 0.3 ± 0.7bc |
| fenchol | 1224 | 0.2 ± 0.2abc | 0.3 ± 0.0a | nd | 0.3 ± 0.2ab | nd | nd | nd | nd | 0.3 ± 0.2abc | nd | nd | 0.2 ± 0.2abc | 0.0 ± 0.0bc | nd |
| undecanal | 1230 | 0.1 ± 0.0b | 0.2 ± 0.2b | nd | 0.1 ± 0.0b | 0.3 ± 0.3b | 0.1 ± 0.0b | 0.3 ± 0.1b | 0.1 ± 0.0b | 0.1 ± 0.0b | 0.3 ± 0.2b | nd | 19.6 ± 0.8a | 0.1 ± 0.1b | 0.3 ± 0.3b |
| neral | 1268 | 2.7 ± 0.2cd | 9.7 ± 2.1bc | nd | 5.9 ± 2.9cd | 3.7 ± 1.8cd | 8.2 ± 5.9bcd | nd | 16.6 ± 4.5ab | 0.3 ± 0.0d | 0.1 ± 0.2d | nd | 24.6 ± 8.3a | 16.1 ± 2.8ab | nd |
| geranial | 1299 | 3.6 ± 0.2de | 11.6 ± 1.6c | nd | 7.4 ± 4.3cd | 1.9 ± 0.7de | 12.1 ± 1.4c | nd | 31.5 ± 4.4a | nd | nd | nd | nd | 22.8 ± 4.1b | nd |
| δ-elemene | 1365 | nd | nd | 1.4 ± 0.4b | nd | nd | nd | 0.7 ± 0.0b | 0.9 ± 0.2b | nd | nd | 2.2 ± 0.6ab | 5.7 ± 5.0a | 0.3 ± 0.0b | 1.6 ± 0.4b |
| citronellyl acetate | 1375 | nd | nd | nd | nd | nd | nd | 0.2 ± 0.0ab | 0.3 ± 0.3ab | 0.4 ± 0.0a | nd | nd | nd | 0.1 ± 0.0b | nd |
| neryl acetate | 1385 | nd | nd | nd | nd | nd | nd | 0.8 ± 0.1bc | 1.6 ± 1.1ab | 0.1 ± 0.0c | 2.3 ± 0.0a | nd | 0.1 ± 0.0c | 0.2 ± 0.0c | 0.1 ± 0.0c |
| geranyl acetate | 1404 | nd | nd | 1.8 ± 0.6b | nd | nd | nd | 0.1 ± 0.0b | 11.7 ± 6.3a | 0.2 ± 0.0 | 3.0 ± 0.2b | nd | 3.5 ± 0.8b | 0.9 ± 0.1b | nd |
| β-elemene | 1420 | 10.92 ± 1.1ab | 0.3 ± 0.1e | 9.0 ± 1.7abc | 11.4 ± 6.4a | 7.5 ± abcd | 2.4 ± 0.4cde | 0.1 ± 0.0e | 2.1 ± 0.7de | nd | 0.1 ± 0.0e | 4.6 ± 3.2bcde | 0.11 ± 0.0e | 0.2 ± 0.0e | 0.2 ± 0.0e |
| α-santalene | 1450 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 34.6 ± 1.0 |
| t-caryophyllene | 1453 | 2.87 ± 0.1cd | 0.6 ± 0.1d | 20.5 ± 2.1b | 3.1 ± 0.8cd | 5.3 ± 1.3cd | 1.0 ± 0.1d | 4.2 ± 0.2cd | 8.6 ± 1.0c | 1.5 ± 0.2d | 5.4 ± 0.6cd | 48.5 ± 8.2a | 2.1 ± 0.4 | 1.8 ± 1.2cd | 17.3 ± 1.4b |
| γ-elemen | 1458 | nd | nd | 9.6 ± 1.1b | nd | nd | nd | 0.1 ± 0.0c | 0.9 ± 0.1c | nd | nd | 14.9 ± 0.8a | nd | 0.1 ± 0.0c | nd |
| t-α-bergamotene | 1460 | nd | nd | 0.3 ± 0.1cd | nd | nd | nd | 0.6 ± 0.0bc | 0.5 ± 0.1bc | 0.5 ± 0.0bcd | nd | 0.1 ± 0.0d | nd | 0.7 ± 0.5ab | 1.0 ± 0.1a |
| t-β-farnesene | 1474 | 1.3 ± 0.0abc | 0.1 ± 0.0d | 2.0 ± 0.2ab | 0.9 ± 0.7cd | 2.2 ± 1.0a | 1.0 ± 0.1bcd | nd | 0.1 ± 0.1d | nd | 0.1 ± 0.1d | nd | nd | 0.1 ± 0.0d | nd |
| epi-β-santalene | 1475 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 3.2 ± 0.2 |
| β-santalene | 1487 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 5.1 ± 0.1 |
| α-humulene | 1487 | 0.6 ± 0.0abcd | 0.1 ± 0.0d | 1.22 ± 0.1ab | 0.8 ± 0.4abcd | nd | nd | 0.1 ± 0.0cd | 1.2 ± 1.3abc | 0.1 ± 0.0d | 0.2 ± 0.0bcd | 1.4 ± 0.2a | 0.2 ± 0.0bcd | 0.3 ± 0.1bcd | nd |
| germacrene D | 1510 | 0.4 ± 0.0c | nd | 5.88 ± 1.1b | nd | nd | nd | 0.1 ± 0.0c | 0.8 ± 0.7c | 0.1 ± 0.0c | nd | 9.5 ± 1.0a | 0.6 ± 0.1c | 0.4 ± 0.0c | 0.1 ± 0.0c |
| α-farnesene | 1521 | nd | nd | nd | 0.3 ± 0.2b | nd | nd | nd | 5.5 ± 3.9a | nd | 1.3 ± 0.1b | nd | nd | nd | nd |
| bicyclogermacrene | 1524 | nd | nd | 0.39 ± 0.1cd | nd | nd | nd | 0.2 ± 0.0d | 0.1 ± 0.2d | nd | 1.3 ± 0.1c | 0.4 ± 0.1cd | 4.3 ± 1.2b | 0.7 ± 0.2cd | 6.6 ± 0.4a |
| β-bisabolene | 1528 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 0.8 ± 0.1a | 0.4 ± 0.0b |
| sesquiterpenol 1 | 1598 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 0.4 ± 0.1 | nd | nd |
| coumarin 1 | 1624 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 0.2 ± 0.2 |
| sesquiterpenol 2 | 1669 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 13.7 ± 2.7 |
| sesquiterpenol 3 | 1679 | 1.2 ± 0.1b | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 3.5 ± 0.9a |
| β-sinensal | 1691 | 0.5 ± 0.1b | 0.3 ± 0.2b | 0.2 ± 0.0b | 1.9 ± 2.0ab | nd | nd | 1.0 ± 0.0ab | 2.5 ± 1.0a | 0.7 ± 0.1ab | nd | nd | nd | nd | nd |
| coumarin 2 | 1703 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 4.8 ± 2.6 |
| seselin | 1898 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 4.7 ± 0.4 |
| coumarin 3 | 1911 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 0.9 ± 0.4 |
Means in the same line with the same letters are not significantly different from each other (Tukey test, p < 0.05). nd: not detected and tr: < 0.01.
Bolded compound were identified by LRI and mass spectra of authentic standards; non-bolded compounds were tentatively identified by LRI and mass spectrum.
Coumarin 1: 7-Methoxy-8-(2-formyl-2-methylpropyl) coumarin
Coumarin 2: 7-Methoxy-8-(2-oxo-3-methylbutyl) coumarin
Coumarin 3: coumarin-6-ol, 3,4-dihydro-7,8-dimethoxy-4,4,5-trimethyl-