## 2 Results and Discussion
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Kinds**} & \multirow{2}{*}{**Aroma Volatiles**} & \multicolumn{4}{c}{**Danghansuli**} & \multicolumn{4}{c}{**Nanguoli**} \\ \cline{3-8}  & & **CK** & **Linoleic Acid** & **Linolenic Acid** & **CK** & **Linoleic Acid** & **Linolenic Acid** \\ \hline Methyl acetate & - [\({}^{\rm(a)}\)] & \(15.7\pm 2.8\) [\({}^{\rm(b)}\)] & \(14.6\pm 4.9\) & \(5.7\pm 3.1\) & \(17.6\pm 8.9\) & \(10.1\pm 3.2\) \\ Ethyl acetate & \(45.9\pm 3.8\) & \(50.6\pm 7.1\) & \(55.6\pm 6.3\) & \(185.4\pm 27.7\) & \(324.8\pm 69.6\) & \(263.3\pm 115.6\) \\ Ethyl propionate & - & - & - & - & \(4.4\pm 1.1\) & \(6.8\pm 1.8\) & \(4.4\pm 1.0\) \\ Methyl butanoate & \(0.9\pm 0.1\) & \(1.8\pm 0.0\) & \(0.7\pm 0.1\) & \(7.4\pm 1.3\) & \(31.5\pm 18.2\) & \(11.1\pm 2.1\) \\ Methyl 2-butenoate & - & \(0.1\pm 0.1\) & \(0.2\pm 0.0\) & - & - & - \\ Ethyl butanoate & \(64.3\pm 8.1\) & \(18.7\pm 3.7\) & \(8.8\pm 5.4\) & \(39.6\pm 13.1\) & \(132.1\pm 2.1\) & \(132.8\pm 11.4\) \\ Butyl acetate & - & - & - & - & \(33.1\pm 17.2\) & \(24.2\pm 6.3\) \\ Ethyl 2-butenoate & - & - & - & \(6.2\pm 2.0\) & \(7.0\pm 4.2\) & \(4.7\pm 2.0\) \\ Ethyl pentanoate & \(0.2\pm 0.0\) & - & - & \(0.8\pm 0.8\) & \(0.2\pm 0.1\) & \(2.7\pm 2.4\) \\ Pentyl acetate & \(1.3\pm 0.1\) & \(7.0\pm 0.8\) & - & \(1.5\pm 0.5\) & \(1.9\pm 0.8\) & \(1.3\pm 0.9\) \\ Methyl hexanoate & \(1.3\pm 1.0\) & \(54.5\pm 3.9\) & \(31.4\pm 12.8\) & \(33.6\pm 8.5\) & \(231.4\pm 10.7\) & \(130.0\pm 3.3\) \\ Methyl 2-hexenoate & \(0.5\pm 0.2\) & \(6.8\pm 0.9\) & \(6.7\pm 3.0\) & \(0.3\pm 0.4\) & \(3.0\pm 1.8\) & \(1.5\pm 1.1\) \\ Esters & Ethyl Hexanoate & \(39.2\pm 5.6\) & \(13.1\pm 11.6\) & \(17.3\pm 10.2\) & \(187.2\pm 37.9\) & \(162.7\pm 15.1\) & \(391.2\pm 10.0\) \\ Ethyl Hex-3-enoate & - & \(21.2\pm 5.5\) & \(43.7\pm 12.1\) & - & - & - \\ Hexyl acetate & \(39.3\pm 14.7\) & \(165.7\pm 9.4\) & \(26.6\pm 1.5\) & \(168.5\pm 28.6\) & \(118.7\pm 6.7\) & \(136.2\pm 11.3\) \\ (Z)-2-Hexenyl acetate & - & - & \(48.2\pm 1.0\) & - & - & - \\ Methyl heptanoate & - & \(8.1\pm 1.1\) & \(3.5\pm 0.7\) & - & - & - \\ Ethyl 2-hexenoate & \(0.2\pm 0.0\) & \(0.2\pm 0.1\) & \(0.3\pm 0.1\) & \(6.7\pm 1.9\) & \(10.346.5\) & \(10.8\pm 0.1\) \\ Ethyl heptanoate & \(1.5\pm 0.5\) & - & - & - & - & - \\ Heptyl acetate & \(0.2\pm 0.1\) & \(0.8\pm 0.5\) & - & \(0.2\pm 0.0\) & - & \(1.8\pm 0.2\) \\
3-Hepten-1-o1-o1-o4-acetate & - & \(0.5\pm 0.3\) & - & - & - & - \\ Methyl octanoate & - & \(28.8\pm 2.6\) & \(11.3\pm 1.8\) & - & \(9.6\pm 1.7\) & \(5.6\pm 0.6\) \\ Methyl (\(E\))-2-ocenoate & - & \(2.6\pm 0.5\) & \(4.9\pm 1.2\) & - & \(1.5\pm 0.1\) & - \\ Ethyl (Z)-4-ocenoate & - & - & - & - & - & \(0.3\pm 0.1\) \\ Hexyl butanoate & - & - & - & \(0.3\pm 0.1\) & - & - \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Contents (ng g\({}^{-1}\).FW) of aroma volatiles derived from fatty acid metabolism for pear fruits feeding on linoleic acid and linolenic acid; \({}^{\rm(a)}\) -, not detected; \({}^{\rm(b)}\) Values represented means \(\pm\) SD of three replicates; \({}^{\rm(c)}\) Capitals denoted significant difference in a line for one cultivar at the level of 0.01. Lowercase letters denoted significant differences in a line for one cultivar at the level of 0.05, according to [PERSON]’s test.