Effects of mixed-culture densities of Spartina alterniflora on eco-physiological characteristics of Kandelia candel seedling

Kandelia candel seedlings were mix-cultured with Spartina alterniflora of different densities for 120 days,and their growth,photosynthetic characteristics as well as osmotic adjustment law were studied.The results showed that the stem height and biomass of K.candel seedlings were enhanced with low density S.alterniflora and inhabited with high density ones.With the density of S.alterniflora going up,Pn、Gs、Tr、WUE and protein content in K.candel seedlings decreased respectively.On the contrary,the content of sugar,starch,proline increased with the density of S.alterniflora increasing.These changes in the physiological properties helped K.candel seedlings to counteract the adverse effects from S.alterniflora.