Abstract: Volatile compounds emitted by Acer truncatum were collected and analyzed by SPME–
GC–MS in spring，summer and autumn，and the photosynthetic characteristics of the species were
measured by CIRAS-Ⅱ photosynthetic apparatus. The main components，seasonal change and influencing
factors of volatile compounds were analyzed. The results showed，the main volatile compounds included
esters，followed by alcohols，aldehydes and terpenes，and the main components were 3-hexenal，
3-hexen-1-ol，3-hexen-1-ol, acetate，acetic acid hexyl ester and β-caryophyllene. The total volatile
compounds concentration varied with seasons，presenting a tendency of spring > summer > autumn，and
the main components showed different releasing patterns. The correlation analysis indicated that there was
a positive correlation between the total volatile compound and the stomatal conductance at the significant
level. And the total volatile compound was accord with temperature，photosynthetic rate and transpiration
rate，but not accord with the PAR.

Key words: Acer truncatum, volatile compound, seasonal change, solid-phase microextraction