Analysis of Volatile Components in Rejuvenation Lines from a Fragrant Rice Variety Diantun 502

PurposeIt was still unknown for volatile components in aromatic rejuvenation lines which selected from a fragrant rice variety Diantun 502. Volatile components of the Diantun 502 and its five rejuvenation lines were identified.

MethodHeadspace solid phase micro-extraction (SPME) combined with gas chromatography-mass spectrometry (GC-MS).

ResultThe results showed that the volatile compounds in Diantun 502 and its five lines (502-23, 502-44, 502-50, 502-92 and 502-115) identified were about 85, 76, 71, 77, 68 and 72, mainly including aldehydes, alcohols, ketones, esters, hydrocarbons, furans, ethers, indoles and phenols. Aldehydes were the most abundant components, followed by alcohols and ketones. Eleven key aroma compounds in five lines were detected with the contents of 47.07%, 46.02%, 41.17%, 44.63% and 35.99%, respectively, each of all was higher than that of the Diantun 502 which was 34.42%. The contents of the key aroma compound (2-acetyl-1-pyrroline) of fragrant rice in these lines were 0.77%, 0.26%, 0.34%, 0.27% and 0.26%, respectively, and that in the line 502-23 was 16.67% more than that in Diantun 502. Aromatic substance geranyl acetone in the lines was also identified with the contents of 1.96%, 2.84%, 3.92%, 1.50% and 1.96%.

ConclusionIt is concluded that these aromatic rejuvenation lines are rich in aroma compounds, especially containing high levels of key rice aroma components.