Fig. 1

Copy numbers of the 16S rRNA gene and cytC gene. Copy numbers were detected in genomic DNA isolated from the wood logs and casing sand used for maitake cultivation for different durations (years) as determined by quantitative (q)PCR). A Log copy number of cytC gene per ng DNA in wood log and casing sand used for maitake cultivation during different years. B Log copy number of 16S rRNA gene per ng DNA in the wood logs and casing sand used for maitake cultivation during different durations. C Log ratio of cytC gene to 16S rRNA gene in the wood logs and casing sand used for maitake cultivation of different durations. Error bars: standard error of the mean. Means with the same letters were not significantly different at p < 0.05 among the different samples