Figure 6.

SSCP profiles of partial 16S rRNA gene products PCR amplified from density gradient fractions of soil DNA from microcosms incubated with ¹³C-DCP. Comparisons of results obtained from soil variants NIL, NPK and FYM, incubated over a period of 9, 14 and 21 days, respectively. Brackets indicate lanes with density fractions in the range of 1.71–1.73 g ml⁻¹. Each band represents a specific PCR product. No specific PCR products were detected in the corresponding density fractions with DNA from control soil incubated with unlabeled (¹²C) DCP (Supplementary Figure S5). Bands (DNA) indicated by numbers 1–6 were sequenced and characterized for the phylogenetic assignment (see Figure 7).