Abstract:
Four kind of
Begonia species were used as experimental materials. The volatile compounds in flower aroma were determined by headspace solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS). Different characteristic aroma and main aroma compounds were identified by odar activity value (OAV) and principal component analysis. The results showed that: ① Fifty-four kinds of volatile compounds were detected in 4 species, the contents of terpenes and benzene/phenylpropanoid compounds are rich. The volatile substances and their total release of 4 species are different. The most volatile substances and total release are in
B. fuchsioides , followed by
B. grandis and
B. pseudodryadis, and the lowest ones are in
B. listada; ② There are 15 characteristic aroma substances (OAV ≥ 1), linalool,
β-myrcene,
D-limonene and decanal have high aroma activity values in 4 species, forming unique aroma together with their own characteristic aroma substances. The aroma characteristics of
B. pseudodryadis flowers are mainly fruity ester- like flavor, green-like flavor is the most prominent in
B. grandis, and
B. fuchsioides is mainly mixed with fruity ester- like and sweet-like flavor; flora, fruity ester- like and sweet-like flavor are the most in
B. listada; ③ The main aroma substance of
B. pseudodryadis is caryophyllene,
α-farnesene
β-ocimene and benzyl nitrile, etc. is mainly in
B. grandis, nonanal and phenylethyl alcohol in
B. fuchsioides contribute greatly, while butylated hydroxytoluene and dodecanal has high contents in
B. listada.