FIG. 4.

Cluster analysis based on ARISA patterns obtained from individual plants of different plant species, taken at two different time points (indicated by 1 and 2). Young leaves of P. reptans, which were taken during the second sampling, are indicated by (y). The ARISA pattern of each sample shows the relative abundance of ARISA fragments. Peaks that contributed less than 3% to a pattern are represented by the fraction called “rest.” Fragment sizes are expressed in experimentally determined numbers of base pairs. The different clusters are grouped together and labeled according to the dominant plant species. Samples whose ARISA chromatograms are shown in Fig. 3 are indicated by an asterisk.