Abstract: Ivy glorybind（Calystegia hederacea） which reproduces mainly by rhizome can be used as an ideal model to study self/non-self discrimination. A greenhouse experiment including three treatments was set up：two connected ramets from the same genet,two dis-connected ramets from the same genet,and two ramets from different genets. The results showed that,compared with connected ramets,the above growth of the dis-connected ramets from the same genet had been inhibited. The rate of stem growth slowed down,branches from the stem base decreased,and biomass allocation to above stem and leaves reduced significantly,too. These results demonstrated that for ivy glorybind,neighboring ramets differentiated self from non-self through the connection of rhizome,which might enabled physiological integration and achieved a better fitness.

Key words: ivy glorybind（Calystegia hederacea）, rhizome, self/non-self discrimination, physiological integration