Abstract: The studies on the photosynthetic characters and growth of Baby's Tears in response to photosynthesis active radiation (PAR) were conducted indoors. The optimum PAR for the growth of S. soleirolii were investigated in the study. The experiment sites were selected to represent the patterns of light intensities in the rooms. The room temperature was in the arrange of 15～25℃ and 33%～69% was for the relative humidity. After 40 days cultivation, the photosynthetic characters of S. soleirolii plants in response to different PAR were measured with a LI-6400 apparatus. The light compensation point, light saturation point, and the maximum net photosynthesis rate were calculated. The increments in branch length and leaf quantity were also measured in all the experiment sites. The results showed that the PAR scope for the growth of S. soleirolii was >8.5μmol·m^-2·s^-1～<299.0μmol·m^-2·s^-1 (425～14950 lx).

Key words: AM fungi, DBP, Pollution, Translocation