Abstract
The present study was conducted to provide information on intraspecific competition using clones of Phragmites australis (Cav.) Trin. ex Steudel (Common Reed). For our purpose, P. australis growths under single plantings with identical clones only (intragenotypic experiments) were compared with those under mixed plantings with different clones (intergenotypic experiments) in laboratory conditions. As the results show, there were not significant differences between growths of above-ground organs of P. australis clones in intragenotypic experiments and those in intergenotypic experiments. Negative effects, however, were shown in growths of below-ground organs of P. australis clones; the dry weights of below-ground organs of P. australis clone in intragenotypic experiments were significantly inhibited as compared with those in intergenotypic experiments (89.0 % of the latter). The above-mentioned results suggest P. australis has intraspecific competition among identical clones in the root communication. Furthermore, these results would offer meaningful information for revegetation, bio-environmental control and elucidation of succession, or biotechnology which enormously produces the plant clones.
