Figure 2

Denaturing gradient gel electrophoresis (DGGE) fingerprints of bacterial 16S rRNA gene fragments amplified from stem and leaf DNA templates obtained from four genotypes of Lippia sidoides using the primers (a) F203α/L1401 and U968/L1401 [26],[30] specific for Alphaproteobacteria, (b) F948β/L1401 and U968/L1401 [26],[30] specific for Betaproteobacteria and (c) F243/L1401 and U968/L1401 [26],[27] specific for Actinobacteria. Two gels were used to compose figures (a), (b) and (c). Lanes 1, 2, 3, 4, 1′, 2′, 3′, 4′ – stem samples and 5, 6, 7, 8, 5′, 6′, 7′, 8′ – leaf samples from genotypes LSID003, LSID006, LSID104 and LSID105, respectively. Lanes marked with M correspond to a 1 kb ladder (Promega). Letters C, D and E followed by numbers indicate bands that were extracted from the gels a, b and c, respectively, for sequence analysis. The right side shows the corresponding dendrograms obtained after cluster analysis with mathematical averages (UPGMA) and Dice similarity coefficients comparing group-specific 16S rRNA gene fragments amplified from stem and leaf DNA templates obtained from four genotypes of L. sidoides. The genotypes are represented by the three first numbers (LSID - 003, 006, 104 and 105), followed by C or F for stem and leaf samples, respectively, and T1 and T2 corresponding to the replicates.