To investigate the differences in volatile components between Chinese and European Japonica rices.
Headspace arrow-type solid-phase microextraction (HS-SPME Arrow) combined with gas chromatography-mass spectrometry (GC-MS) was used for determination, and principal component analysis (PCA),hierarchical cluster analysis (HCA), orthogonal partial least squares analysis (OPLS-DA) and odor activity value(OAV) were applied to analyze the volatile components of Chinese and European Japonica rice.
The 130 kinds of and 129 kinds of volatile components were identified based on HS-SPME Arrow combined with GC-MS for Chinese and European Japonica rices, respectively. Differences between the volatile components of Chinese and European Japonica rices were revealed by PCA and HCA; variable importance in projection (VIP) values in OPLS-DA were applied to determine the differential volatile components between Chinese and European Japonica rices, and 4 kinds of key differential volatile components were further screened by the OAV, which were 2-n-pentylfuran (26.98 in China, 6.48 in Europe), n-hexanol (4.51 in China, 0.07 in Europe), trans-2-octenal (15.61 in China, 4.82 in Europe) and trans-2,4-decadienal (369.42 in China, 84.94 in Europe).
The study reveal significant differences in volatile components between Chinese and European Japonica rices, providing a reference basis for the construction of branding and value-added enhancement of speciality rice.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |