DNA extraction and purification efficiency was evaluated in a
test soil from a maize field spiked with a defined number of Erwinia
amylovora CFBP 6449 (108 cells per gram soil). A logarithmic dilution
series of the Powersoil DNA extracts was quantified in four
replicates using an E. amylovora specific TaqMan assay (Gottsberger,
2010). The mean DNA recovery from soil using this procedure was
approx. 60%. No inhibition was detectable at a 101 dilution of the
Powersoil DNA eluate.