Figure 1. Agarose gel electrophoretogram of the total DNA extracted from one rhizospheric soil sample (sampling site 1) with three different approaches independently and with a combination all the three approaches. Lane 1: hot SDS lysis; Lane 2: bead beating; Lane 3: freeze thaw cycles; Lane 4: extraction with hot SDS followed by bead beating and freeze thaw cycles and Lane 5: Molecular size marker (λDNA digested with Hind III and pUC18 DNA digested with Sau 3AI and Taq I).