Abstract
The annual seedlings of ten Toona Sinensis provenances were selected for the study of the relationship between cold resistance and fatty acid composition and content of leaves. The results indicated that the fatty acid composition was the same among different provenances. The main ones were Dodecanoic acid, Hexadecanoic acid, (Z,Z)-9,12-Octadecadienoic acid, (Z,Z,Z)-9,12,15-Octadecatrienoic acid, Octadecanoic acid and Eicosanoic acid. But there were evident differences in fatty acid content and index of unsaturated fatty acid (IUFA) among different provenances. The content of unsaturated fatty acid and the IUFA was smaller in southern provenances of Xiapu of Fujian, Qianxinan of Guizhou and Dongkou of Hunan than those of the other provenances from north .The fatty acid content and IUFA were higher in provenances whose cold resistance were stronger. And the results showed that the fatty acid content and IUFA had a positive correlation with cold resistance of Toona sinensis.
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