Fig. 5. Principal component analysis (PCA) of the relative species compositions (based on identification by fatty acids) of cultured rhizobacteria from the non-transgenic control (DES), transgenic control plant line (DC1), and transgenic lines (DL4 and DL5) in five samplings. The clustering of the species patterns was based on PCs 1 and 2, explaining 28 and 16% of the variance, respectively. Reproduced with permission from Heuer et al. (2002).