Relationships between main aroma constituents and aroma notes index of flue-cured tobacco leaves of different flavor styles.

In order to determine material base of aroma component influencing tobacco leaves main aroma notes,relationship between flue-cured tobacco aroma constituents( polyphenol,organic acid and neutral aroma constituents)and aroma notes( hay fragrance,burnt-sweetness aroma,burnt aroma,pure-sweetness aroma,fresh-sweetness aroma and green fragrance) were investigated by analytical methods of partial correlation analysis,path analysis and stepwise regression with 269 samples of 3 flavor styles as testing material. Results showed as follows: Scopoletin,linalool,geranyl acetone,benzyl alcohol,benzene ethanol,guaiacol and neophytadiene were very significantly positive correlation with hay fragrance and had greater positive effect; burnt-sweetness aroma and burnt aroma had extremelysignificantly positive correlation with sophorone oxide,6-methyl-5-heptylene-2-alcohol,geranyl acetone,benzyl alcohol,farnesyl acetone,β-damascone and solanone with greater positive effect; pure-sweetness aroma was extremely significantly positive correlation with benzene ethanol,rutin,megastigmatrienone 1 ~ 4 and had greater positive effect;positive correlation between green fragrance and benzyl alcohol and neophytadiene was extremely significantly with greater positive effect; fresh-sweetness aroma was extremely significantly positive correlation with sophorone oxide,6-methyl-5-heptylene-2-one,β-damascone,megastigmatrienone 1,farnesyl acetone and 3-hydroxyl-β-damascone with greater positive effect,but organic acid had negative correlation with nuances; optimum regression equation of main aroma index of different flavor styles and aroma component was established,and regression equation could be used to predict aroma notes characters of different flavor style.