Abstract:Androdioecy (the coexistence of two genders,bisexuals and males,in a single population) is a rare breeding system.The association between plant functional traits and breeding system give us a new insight to determine the strategies how plants adapt to environment.It is considered to be necessary to analyze the correlation of functional traits and carbon contents,especially when studying about the differences between reproductive and vegetative growth process.We analyzed the specific leaf area(SLA),leaf dry matter content(LDMC),branch dry matter content(BDMC),leaf carbon content and branch carbon content in different flower and fruit developmental stages of both genders.The main results can be summarized as follows:(1) no significant difference was found in the same flower and fruit developmental stages for these functional traits except for LDMC in fruit inflating stage(P<0.05).However,these functional traits are significantly different between three flower and fruit developmental stages.As for bisexuals,LDMC,SLA,strong correlation were observed between full-bloom stage and fruit inflating stage,fruit inflating stage and mature stage,respectively(P<0.001),while no difference for males.(2) Strong positive correlation were observed between LDMC and BDMC as for bisexuals (P<0.001).Conversely,weak positive correlation were observed between LDMC and BDMC for males(P<0.05).(3) No significant difference was found in the same flower and fruit developmental stages for both genders’ leaf carbon content and branch carbon content.Obvious difference was found among three stages(P<0.001),and the branch carbon content in the full-bloom stage was the greatest,the second for fruit inflating stage and the least for mature stage (4) Positive correlation was found between leaf carbon content,branch carbon content and LDMC,BDMC for bisexuals(P<0.001),while there was positive correlation only between leaf carbon content and BDMC for males(P<0.05).We can conclude that Acer mandshuricum’s reproductive and vegetative growths vary among phases obviously.Bisexuals showed stronger correlation between leaf and branch than that in males,and this was also found in the ability to obtain and maintain resource.This suggests that bisexuals have a high concordance with obtain resource and transmission system,which is a strategy to adapting to the environment.For bisexuals,reproductive cost seems not to be high enough to affect vegetative growth,and we infer that bisexuals may have compensation mechanism.