Abstract:

In order to compare the component and variation of volatile profiles of different family of Larix olgensis，volatiles from eight families of L. olgensis1，L. olgensis2，L. olgensis3×L. gmelinii1，L. olgensis4×L. gmelinii2，L. olgensis5×L. kaempferi，L. olgensis6，L. olgensis7，L. olgensis8 were collected with a silonite T M container by dynamic headspace collection. The collected volatiles were concentrated by using a 7 100A precondensable apparatus before they were analyzed and identified with GC-MS. The 33 species of volatiles were isolated and identified with 17 species of terpenoids and 16 species of alkanes. The primary terpenoids in the volatile profiles in the all families were camphene，βmyrcene，1Rαpinene，αterpinen，βphellandrene，γterpinen，(+)4carene，germacren D. Some families had tricyclene，Dlimonene，βtransocimene，camphor，bornyl acetate，αlongipinene，copaene，caryophyllene，αcaryophyllene. The relative percentage and species of terpenoids were obvious difference in the various families. L. olgensis2 had the highest relative percentage of terpenoids at 89.65% of the collected volatiles with 8 species of terpenoids(including 5 species of sesquiterpenes), followed by L. olgensis 7 at 84.41% with 7 species；L. olgensis4 at 78.59% with 7 species(including 1 species of sesquiterpenes)； L. olgensis6，L. olgensis3×L. gmelinii 1 and L. olgensis 5×L. kaempferi at 68.35% with 4 species，67.93% with 5 species(including 2 species of sesquiterpenes)，68.72% with 7 species，respectively；L. olgensis1 at 31.34% with 1 species； and finally L. olgensis8 at 24.59% with 5 species(including 1 species of sesquiterpenes).

Key words: Larix olgensis, family, volatile, GC-MS